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View Full Version : Put 450r carb on my 440ex



Mobile Dyno
05-09-2005, 08:03 PM
I got me a 450r carb last week for my 440ex. I wanted to share my experience with installing it. I found out that I had to clear the stop ring that is inside the airbox boot. I just sanded it down smooth. Then I heated it up and it fit right in. I had no problem getting the carb to fit the intake boot on the head. The only problem I had was the choke. The stock 450r choke was hitting the petcock on the tank. So I just fabricated one. I also trimmed the heat shield for the tank so it would clear the Hot Start. Other than the choke, it was a nice and easy installation. I still have to Dyno it to get the A/F right. I put a dynojet 170 in it to start with. Feels good. I also lapped in my valves this weekend(thanks Chad). I want to get over the 40hp mark. I was at 36hp. It will get on the Dyno Wednesday and I will post the Gains of what it did.

Mobile Dyno
05-09-2005, 08:09 PM
The Choke. I'm fabricating a better one. This one works for now.

Mobile Dyno
05-09-2005, 08:14 PM
I just got some fuel hose from my local store. Works good.

Mobile Dyno
05-09-2005, 08:17 PM
..

Mobile Dyno
05-09-2005, 08:24 PM
I wish I would of taken a pic of the valves before but I didn't. I was in a hurry. Here ia pic of them cleaned up. Imagine 3 years of build up on them.

Mobile Dyno
05-09-2005, 08:28 PM
Nice view.

Mobile Dyno
05-09-2005, 08:32 PM
Here is what my bike looks like now. I'll show pics of it on the dyno.

Mobile Dyno
05-09-2005, 08:35 PM
Side

400exredrider
05-09-2005, 09:59 PM
LMK if you get something fabbed up to re mount that airbox,,, mine is zipped tied on,,, im useing FCR40mm

6858-400ex
05-10-2005, 07:27 AM
lookin good what do u have instead of a snorkel on ur air box

Mobile Dyno
05-10-2005, 07:32 AM
I have a Nac's block off.

400exredrider
05-10-2005, 08:23 AM
beer can and ducttape :D

khen
05-10-2005, 09:36 AM
Looks good Mobile Dyno.. What cam are you running? I'm looking forward to seeing the results of your dyno run.

Mobile Dyno
05-10-2005, 09:48 AM
I just have a White Bros. XC cam. I will go with a more aggressive came later

QuadJunkies
05-11-2005, 12:32 AM
nice pics. Glad your likin your Carb too!! I put mine on this winter and am TOTALLY luvin this carb! :macho The throddle response is AWESOME isnt it??!

Rico
05-11-2005, 08:51 AM
I need to find one and see if It'll even work with a larger Gas Tank...:ermm:

400exredrider
05-11-2005, 09:23 AM
yeah rico your tank is huge :eek2: id gt an FCR if i were you

Doibugu2
05-11-2005, 09:28 AM
Originally posted by Rico
I need to find one and see if It'll even work with a larger Gas Tank...:ermm:

Price of the regular FCR's are coming down. If your tank is at the same level as the stocker the FCR should fit okay.

khen
05-13-2005, 08:53 PM
Hey Mobile Dyno, did you ever get a chance to dyno your 440 with the 450R carb?

bakeen
05-14-2005, 11:20 PM
Is the only problem with this the choke? If so I may try this. I heard the 450R carb is only around $155-$165 on Service Honda. I have a mostly stock 400EX but I will be at least putting a high compression piston & cam in it. Probably will go with a 426 or 440 kit but I'm thinking of getting a FCR carb first and the 450R carb is cheap. My gas tank is stock so this should fit correctly right?

400exredrider
05-14-2005, 11:23 PM
yes but it will then make your air box fitting to short, you can either make an adaptor or move the airbox forward an inch.

Rico
03-08-2006, 05:26 AM
what did you do with the 2 electical connections coming off the carb??

Rico
03-08-2006, 05:32 AM
also I'll be buying a brand new one.

What needs to change, needle, pilot, i know the main jet will need adjusted.

I"M running a 416 bore, HRC Cam, mild port work, slightly modified airbox lid, it runs good and strong.

Chino886
03-08-2006, 06:03 AM
Originally posted by Rico
what did you do with the 2 electical connections coming off the carb??

I think that is either the TPS or Hotstart.........nothing if that is the case.

Rico
03-08-2006, 06:32 AM
Originally posted by Chino886
I think that is either the TPS or Hotstart.........nothing if that is the case.

I knew they weren't connected to anything on the 400ex just wondering if people just tie them off, cut them off or what.

I did see mobiledyno's sig which has his settings on his carb so I'll probably start around what he has and go from there. I just hope it doesn't hurt poopin out 450's during races after I eat em up...:eek2:

Mobile Dyno
03-08-2006, 07:49 AM
Rico, The 2 electrical conection coming of the carb is for the TPS. I just taped them up and tied them out of the way. You do not need them. You do not nee the Hot Start. I just plugged that hole.

Stock pilot will be fine, Needle in the 3rd with no lid or the 2nd with lid, K175 main with no lid or a K160 with lid on.

Rico
03-08-2006, 08:27 AM
Originally posted by Mobile Dyno


Needle in the 3rd with no lid or the 2nd with lid

2nd from bottom or top???

Mobile Dyno
03-08-2006, 10:21 AM
Top

QuadJunkies
03-08-2006, 10:24 AM
Originally posted by Mobile Dyno
Rico, You do not nee the Hot Start. I just plugged that hole.



Thats what we did on mine as well.

RidinRed00400ex
03-08-2006, 08:43 PM
well, what'd it do with the 450R carb?

Rico
03-10-2006, 12:42 PM
My carb is shipping today.......:devil:

TheChknhwk
03-13-2006, 07:06 AM
I got mine too, just not ready to put it on yet.:(

Chino886
03-13-2006, 07:18 AM
nothing more frustrating then messing with a new carb....:grr:

I spent 2 1/2 hrs modding the old 400 to make my 39mm fcr work on Saturday afternoon. Now I have to mess with the jetting!

QuadJunkies
03-13-2006, 09:48 AM
My jetting was fairly simple on mine .

Rico
03-13-2006, 10:03 AM
Originally posted by QuadJunkies
My jetting was fairly simple on mine .

what is yours???

QuadJunkies
03-13-2006, 11:42 AM
Originally posted by Rico
what is yours???

Right now mine is set at a 175 main .middle on the needle, 3 turns out on the fuel screw. I think its a 45 pilot.

Temps are approx. 20-45 degrees right now and I can run this jetting with No problem. Mine tends to run better a little on the fatter side,its always been that way. I run between a 175-182 year round.

racer400ex10
04-04-2006, 07:20 PM
so what does everyone do with their choke in this situation.. and what size main jet does the 450r carb come with

Rico
04-05-2006, 06:09 AM
Originally posted by racer400ex10
so what does everyone do with their choke in this situation.. and what size main jet does the 450r carb come with


I removed the choke lever completely. Choke levers are for dummies....:o

I put a 50 pilot jet in mine, stock is 48 and it fires up and runs just fine.

Stock main jet is 185. My 416 actually ran ok on the 185 jet but I think it's a little on the fat side and will be going down on the size this week. I"ll post what my final carb settings are when I'm finished.

Mobile Dyno
04-05-2006, 07:07 AM
Stock 450r Carb comes with a 118 main not a 185! Rico you should be at a 175 main. Do you run the lid on or off?

Rico
04-05-2006, 07:59 AM
Originally posted by Mobile Dyno
Stock 450r Carb comes with a 118 main not a 185! Rico you should be at a 175 main. Do you run the lid on or off?

Mine had a 185 main in it but I also found out the carb I bought came off a dirtbike...LOL

I have velocity stack tube in mine from GT Thunder. I'm guessing a 170 - 180 should do the job.

insaneracin2003
04-05-2006, 11:46 AM
can we pruchase a 450r carb from service honda and for about how much,is 150-160 true??

Rico
04-05-2006, 12:15 PM
Originally posted by insaneracin2003
can we pruchase a 450r carb from service honda and for about how much,is 150-160 true??

I was told by service honda $170 for an 04 carb, 05 and 06 carbs are twice as much.

Chino886
04-05-2006, 12:17 PM
Originally posted by Rico
I was told by service honda $170 for an 04 carb, 05 and 06 carbs are twice as much.

I am almost 99.9% sure, but the 06 is a FCR carb....:p

Rico
04-05-2006, 12:19 PM
Originally posted by Chino886
I am almost 99.9% sure, but the 06 is a FCR carb....:p

I believe your right.


You can also look on ebay and other ATV forums like I did and pick up a almost new one for less than $100.

Chino886
04-05-2006, 12:19 PM
Originally posted by Rico

You can also look on ebay and other ATV forums like I did and pick up a almost new one for less than $100.

If I were looking, that is where I would go!

racer400ex10
04-05-2006, 09:10 PM
i have a 440 12.5:1 comp., stage 2 hotcam, port polish and kibble white valves and springs, curtis sparks x6 exhaust.. and obviously the 450 carb w/ the airbox lid off....... i was pry gonna start out with a 190 main i would rather be too rich than too lean.. and i just did what u guys said and did away with the choke for now

Rico
04-13-2006, 07:51 AM
Final carb settings on my 416ex, the carb did not come off a TRX450, but a CRF450 dirtbike. It came with a 48 pilot and 185 main.

I think if I had a dyno to run it on and a sniffer I could get it even better but for now she runs good.

My carb settings are....
Main jet 160 Dynojet from my 400ex carb kit
Pilot jet 48
Air/fuel mixture screw 2 full turns out

Motor mods..
Bored .080 over to 416cc
HRC cam
JE Piston 10.8:1 Compression
Hinson Clutch Basket
Cometic Gaskets
Sparks Racing 8 Plate Clutch w/Heavy Springs
Sparks Heavy Duty Cam Chain
Lightened Flywheel
GT Thunder Porting
GT Thunder CDI
GT Thunder Heavy Duty Head Studs
GT Thunder Air Box Intake Tube
FMF Powerbong Header
Red HMF Silencer
AMSOIL Air Filter

TheChknhwk
04-13-2006, 07:54 AM
I thought you said the 400ex dynojets wouldn't fit.

insaneracin2003
04-13-2006, 07:55 AM
Originally posted by Rico
Final carb settings on my 416ex, the carb did not come off a TRX450, but a CRF450 dirtbike. It came with a 48 pilot and 185 main.

I think if I had a dyno to run it on and a sniffer I could get it even better but for now she runs good.

My carb settings are....
Main jet 160 Dynojet from my 400ex carb kit
Pilot jet 48
Air/fuel mixture screw 2 full turns out

Motor mods..
Bored .080 over to 416cc
HRC cam
JE Piston 10.8:1 Compression
Hinson Clutch Basket
Cometic Gaskets
Sparks Racing 8 Plate Clutch w/Heavy Springs
Sparks Heavy Duty Cam Chain
Lightened Flywheel
GT Thunder Porting
GT Thunder CDI
GT Thunder Heavy Duty Head Studs
GT Thunder Air Box Intake Tube
FMF Powerbong Header
Red HMF Silencer
AMSOIL Air Filter
any mounting problems?

Rico
04-13-2006, 08:11 AM
Originally posted by TheChknhwk
I thought you said the 400ex dynojets wouldn't fit.

I lied.....:o

After I got the dynojet adapter I seen that they would fit. I'm sure if I had a dynojet needle in there it would work even better but the carb actually has a HRC needle in it.

For more instructions on the install click this

04gixxer
04-13-2006, 10:03 AM
I just picked up a 450 carb as well. I have not been into the motor yet, and was wondering if anyone knew what jet settings I should use, or at least a starting point.

BORY
04-17-2006, 06:21 AM
is it true that pputting a 450r carb on a 400ex moves the airbox and inlet tube toward the motor an inch?

Chino886
04-17-2006, 06:26 AM
yes it is, I had to do the same thing with my 39mm FCR, or pay money for an adapter.

Rico
04-17-2006, 07:06 AM
Originally posted by BORY
is it true that pputting a 450r carb on a 400ex moves the airbox and inlet tube toward the motor an inch?

Yes it's true but an easy fix.

Chino886
04-17-2006, 07:17 AM
Originally posted by BORY
is it true that pputting a 450r carb on a 400ex moves the airbox and inlet tube toward the motor an inch?

I forgot to mention, that the power that you gain from the 450R carb, or another aftermarket carb is worth the work.

I bought a "U-bolt" bracket and cut it in 1/2. Then drilled a hole in it and mounted it to the subframe and to the back of the air box. Cost me a total of $1.37 and 30 minutes of fabricating on Easter Sunday!

goinnukinfutz09
04-18-2006, 09:13 PM
Im made a medal plate to move my air box forward. I also removed my snorkel along time ago, I use the foot from a pair of nylons, and use that as a pre-filter for my air box. I put it on the outside and clamp it on, it works great.

400exbilly
04-21-2006, 04:13 PM
So when you put a 450 carb on a 400ex wont it have to be an aftermarket one b/c the 450's hae a computer and a 400ex dont

400exstud
04-21-2006, 09:41 PM
As far as I know 450Rs don't have a computer. FI quads have comps but not the 450R.

400exredrider
04-22-2006, 09:47 AM
i didnt have to move anything ahead back when i did that to the old 416, i used a rubber plumbers fitting and some car exhaust and hose clamps to extend the airbox. worked very well and cost me about 7 dollars total and a little bit of sawing

Ralph
04-29-2006, 03:09 PM
Originally posted by Rico
Mine had a 185 main in it but I also found out the carb I bought came off a dirtbike...LOL

I have velocity stack tube in mine from GT Thunder. I'm guessing a 170 - 180 should do the job.

mine came with a 185 too and the guy u bought it from said it was off a quad but it has a little pull knob for the hot start which i know the quads dont have... hmm

Im gonna be installing mine tommoorow probably and ill also post how it goes.

insaneracin2003
04-30-2006, 09:41 AM
look like im going to be installing mine today also.so should we go to a 170 main,stock pilot,and needle in 3rd position?

Ralph
04-30-2006, 12:29 PM
Got mine on, i just need to deal with a few more things and then i will be ready to fine tune the thing!

I also have the k185 in it with the stock pilot and needle in the center with the open airbox, 416, port and polish, etc. It starts and revs fine but i have not been able to test it out yet.

insaneracin2003
04-30-2006, 03:28 PM
Originally posted by Ralph
Got mine on, i just need to deal with a few more things and then i will be ready to fine tune the thing!

I also have the k185 in it with the stock pilot and needle in the center with the open airbox, 416, port and polish, etc. It starts and revs fine but i have not been able to test it out yet.
i am installing my carb as we speak.did you have to cut some material off the intake to get the carb in there? and how did you stretch the boot from the air box to get that on the carb? Ricos beer bottle way?...lol.....anyway,i checked the main jet and it is a 168,should i go up a lil? mine is a 416 10;8-1 comp.kibblewhite valves,port-polish,stage 2 hotcam....thanks

goinnukinfutz09
04-30-2006, 04:26 PM
i used a razor blade to trim the inside of the intake boot from the motor and i used a mini blazer butane torch to heat up the rear boot from the air box, i heated it up and then stretched it over the carb. Becareful it's hot!!, but if you heat it up it works better, then when it cools down it tightens up and everything is great.

insaneracin2003
04-30-2006, 05:23 PM
Originally posted by goinnukinfutz09
i used a razor blade to trim the inside of the intake boot from the motor and i used a mini blazer butane torch to heat up the rear boot from the air box, i heated it up and then stretched it over the carb. Becareful it's hot!!, but if you heat it up it works better, then when it cools down it tightens up and everything is great.
sweet,thanks......

Ralph
04-30-2006, 05:28 PM
Originally posted by insaneracin2003
i am installing my carb as we speak.did you have to cut some material off the intake to get the carb in there? and how did you stretch the boot from the air box to get that on the carb? Ricos beer bottle way?...lol.....anyway,i checked the main jet and it is a 168,should i go up a lil? mine is a 416 10;8-1 comp.kibblewhite valves,port-polish,stage 2 hotcam....thanks

is there a keihin 168 or a dynojet?

Also, im at about ground level running a k185 but i will probably be going down a bit. I didnt trim anything on the intake. Its just really tight. I heated up the airboot an stretched it out too. I just need to go out and buy a 450r throttle cable and get this thing tuned in right now.

Ralph
04-30-2006, 05:46 PM
Also, for the fuel line i noticed my friends 450r had a breather tube that fit perfect for the fuel line. It starts off real small and then gets big at the end. Couldnt have found anything better.

pmptrk
04-30-2006, 06:33 PM
Another tip for the fuel line: Buy some 1/2 fuel line. cut a small piece off of your old line and slide it onto the petcock, then slide the new 1/2 inch line over that. the old line fits perfect inside 1/2 inch line and the new line is also a proper fit on the carb side.

Ralph
04-30-2006, 06:52 PM
I just got word that it was pissing gas while i had it in a friends truck and i know its not the fuel line so it looks like im gonna be spending some time tommorow finding out where it leaking, wether the float is stuck or whatever...

insaneracin2003
04-30-2006, 07:03 PM
Originally posted by Ralph
I just got word that it was pissing gas while i had it in a friends truck and i know its not the fuel line so it looks like im gonna be spending some time tommorow finding out where it leaking, wether the float is stuck or whatever...
did ya plug up the hot start hole?

ahatcher21
04-30-2006, 07:20 PM
Rico I need some advice. I tried to email and PM you but the site said you refused them. I need help with my 450r carb on my 400. Could you email me at polarisboy21@juno.com. I have a sock bore 400 with k&n filter, no air box lid, white bros slip on shortie, white bros rev box, I got the bike to run at idle with no choke, but I bet I have the air/fuel mixture screw out 3 turns or more. I'm running a stock 450r pilot (48). The quad wont take much throttle at all a little, but not much. The carb has the stock main in it still (118). Also I have a dynojet kit for a 400 ex stock carb. But the main jet on on a 450r carb is so much longer, can I use my jet kit on the 450r carb. I hope to hear from you soon.

Alan
polarisboy21@juno.com

Ralph
04-30-2006, 10:50 PM
Originally posted by insaneracin2003
did ya plug up the hot start hole?

Mine had one of those red pull levers so i did not remove it cause i fugured removing it would do the same thing as leaving it on and i wasnt sure if that was ok. I just left the stock lever on the carb because i didnt have any clearance issues with it.

sixer3
04-30-2006, 11:43 PM
Rico I need some advice. I tried to email and PM you but the site said you refused them. I need help with my 450r carb on my 400. Could you email me at polarisboy21@juno.com. I have a sock bore 400 with k&n filter, no air box lid, white bros slip on shortie, white bros rev box, I got the bike to run at idle with no choke, but I bet I have the air/fuel mixture screw out 3 turns or more. I'm running a stock 450r pilot (48). The quad wont take much throttle at all a little, but not much. The carb has the stock main in it still (118). Also I have a dynojet kit for a 400 ex stock carb. But the main jet on on a 450r carb is so much longer, can I use my jet kit on the 450r carb. I hope to hear from you soon.

i know regular kehin jets work fine in both carbs not sure about dno-jets, but for kehin have about the same as you, with a 170 main jet, stage1 cam, hmf slip, alba cdi, no airbox...good luck pm me if u need more advice, what elevation you at? turn the air screw out 2.5 turns while your at it, 3 and up is a lil rich

ahatcher21
05-01-2006, 09:40 AM
Should I go up to a 50 pilot or leave it where its at?

smartypants
05-01-2006, 12:32 PM
rico was banned.

you'll find him at q u a d z o n e.com for answers

Ralph
05-01-2006, 02:41 PM
Right now i still havent ridden mine but when i quickly punch the throttle it bogs out and dies. Any advice?

insaneracin2003
05-01-2006, 03:05 PM
Originally posted by Ralph
Right now i still havent ridden mine but when i quickly punch the throttle it bogs out and dies. Is this the pilot jet? Any advice?
i am not sure,i will be finishing up mine tonight and see what mine does.i think mine has the stock pilot in it.i will let ya know...

rob-u/21
05-01-2006, 03:59 PM
I'm also having problems. I already bolted everything. I have a 180 main with the stock pilot (48), I put a bolt where the hotstar goes. but it is hard to start and when it starts it wont idle. When I open the fuel/air mixture screw gas start leaking out. A advice.

pmptrk
05-01-2006, 05:34 PM
Originally posted by rob-u/21
I'm also having problems. I already bolted everything. I have a 180 main with the stock pilot (48), I put a bolt where the hotstar goes. but it is hard to start and when it starts it wont idle. When I open the fuel/air mixture screw gas start leaking out. A advice.

Gas shouldn't leak out from the A/F screw if it is turned out 3 or less turns. Sounds like you are opening the bowl drain screw, which is meant for gas to leak out (through the hose, not the screw). The A/F screw is underneath the carb, and a beotch to access. Im not saying you don't know what the a/f screw is, but the drain screw was my first thought.

goinnukinfutz09
05-01-2006, 07:58 PM
I have a 190 main jet in my carb. Im in wisconsin and the weather up here isn't always the best. It runs great, my throttle response is unbelieveable. You can look at my extra's to see whats all done.

ahatcher21
05-01-2006, 09:20 PM
I have a stock bore 400ex I put a dyno jet 170 main in it, I have a stock 48 piloy in a 450r carb. It idles ok but pops often. When I hammer the throttle it bogs quickly and then revs ok. What is my next step? A 50 pilot maybe? I have the A/F screw out 2.5 turns. Need help.

insaneracin2003
05-02-2006, 08:33 AM
I am having a hella time trying to get the air boot on the back of the carb all the way :chinese: ...once i get that i can hopefully tune the thing.....

insaneracin2003
05-02-2006, 08:36 AM
Originally posted by pmptrk
Another tip for the fuel line: Buy some 1/2 fuel line. cut a small piece off of your old line and slide it onto the petcock, then slide the new 1/2 inch line over that. the old line fits perfect inside 1/2 inch line and the new line is also a proper fit on the carb side.
where can i get 1/2 inch fuel line,i checked just about everywhere and cant find that size.....3/8 is the largest i found.......

rob-u/21
05-02-2006, 09:57 AM
Gas shouldn't leak out from the A/F screw if it is turned out 3 or less turns. Sounds like you are opening the bowl drain screw, which is meant for gas to leak out (through the hose, not the screw). The A/F screw is underneath the carb, and a beotch to access. Im not saying you don't know what the a/f screw is, but the drain screw was my first thought.

You are so right. I actualy figured it out as soon as I posted yesterday. I wish I had not posted that. I feel like an idiot. Well, I made 2 1/2 turns. The first couple of runs through the street felt crapy, would bog while wide open. Then it just fixed itself and felt great after. I still want to do some fine tuning. Thanks very much for the post. There is always some one in these forums that can tell you exactly what you need. Great website.

pmptrk
05-02-2006, 10:05 AM
Originally posted by insaneracin2003
where can i get 1/2 inch fuel line,i checked just about everywhere and cant find that size.....3/8 is the largest i found.......

I found it at a local hardware store. It may not be rated for fuel, but it is thick enough rubber hose that I doubt I will have any problems with it. Im surprised it is hard to find in your area.

Buffalo400
05-02-2006, 04:22 PM
Be sure that your bolt into the hot starter cable don't leak. I put a plastic plug with glue on the outside...

goinnukinfutz09
05-02-2006, 09:14 PM
I bought my fuel line at the local hardware store. It's hard plastic hose that i used. i also decided to keep my hotstart cable in my carb. I ran it to my steering stem and then put it right back under my gas tank and zip-tied it.

insaneracin2003
05-04-2006, 07:11 AM
i finally got that puppy installed,i didnt have to move my airbox forward :ermm: i know that my boot is on but not completely all the way to the carb body. i had to get some breather line from auto zone to use as my fuel line.That shouldnt hurt huh? here is a pic

TheChknhwk
05-04-2006, 07:13 AM
http://d14scrambler.com/quad/albums/uploads/400ex_rebuild/normal_DSCN0864.JPG

babiak400ex
05-04-2006, 08:23 AM
Hello All ! I have recentally purchaced a 450r carb that has the hrc modifications which I was told consisted of a needle and 185 jet. I plan on putting mine on soon im trying to gather as much information as I can first of corse. I have a dail-a-jet it has 5 differnt settings 1st setting being just a little richer than the main jet and 5th setting being the richest. That will help me greatly when I go to jetting. The thing is with this is that it recommends jetting your carb a few jets leaner than normal so you have a wider variation for tuneing So for instance if I put in a 160 sounds to me from what I have read would be on the lean side so this would allow me to dial in my jetting from 165 up to a 185 without removal of the carb to rejet. This is a great help too if you ride in differnt altitudes or hot and cold temps too. I guess that was mostly info about that. My ? was do you think 160 would be on the lean side or should I go 155. And I have a dyno jet kit And was wondering if anyone knew If I could use that needle out of the 400 carb in the 450 carb or can I just use the needle in the 450 carb. And I havent really figured out about the piolit jet if that needs to be changed or not.

insaneracin2003
05-05-2006, 07:54 AM
ok,got everything on,bolted up and i turn on my fuel pet-cock from the tank and now fuel is running out of the drain line out the bottom of the carb! are my floats stuck?? sheesh.....woopin up on me!!:scary:

Ralph
05-05-2006, 04:38 PM
Originally posted by insaneracin2003
ok,got everything on,bolted up and i turn on my fuel pet-cock from the tank and now fuel is running out of the drain line out the bottom of the carb! are my floats stuck?? sheesh.....woopin up on me!!:scary:

could be your float. Make sure everything down there is put together right. Also there is a screw to drain the bottom of the carb which you may need to screw in. It looks just like the a/f screw but its the one on the side. The one on bottom is a/f

Buffalo400
05-06-2006, 07:18 AM
Originally posted by insaneracin2003
ok,got everything on,bolted up and i turn on my fuel pet-cock from the tank and now fuel is running out of the drain line out the bottom of the carb! are my floats stuck?? sheesh.....woopin up on me!!:scary:

what he said.

Can be your fdloat but before, be sure your drain screw is tight.

jsmith2232
05-09-2006, 09:44 AM
is it necessary to have a 450r throttle cable to hook up the 450's carb t oa 400 ex

insaneracin2003
05-09-2006, 09:57 AM
Originally posted by Buffalo400
what he said.

Can be your fdloat but before, be sure your drain screw is tight.
would that make it leak through the the rubber line coming from the bottom of the carb??

smartypants
05-09-2006, 02:08 PM
Originally posted by insaneracin2003
would that make it leak through the the rubber line coming from the bottom of the carb??

Your bowl drain screw is open.

premiumtommy
05-10-2006, 09:35 AM
Originally posted by jsmith2232
is it necessary to have a 450r throttle cable to hook up the 450's carb t oa 400 ex

yes.. the fitting on the end of the cables are different

jsmith2232
05-10-2006, 09:38 AM
Can i just get the end from my local honda shop and about how much is it?

QuadJunkies
05-10-2006, 10:03 AM
Originally posted by jsmith2232
Can i just get the end from my local honda shop and about how much is it?
was it you that PM'd me about this??
Just by the 450 cable, its not that expensive. :o

you have to run the 450 cable like premiumtommy said ;)

jsmith2232
05-10-2006, 12:16 PM
Thanks guys, I'll post up on this next week when my carb comes and i get a chance to put it in.

Ralph
05-10-2006, 12:47 PM
You can get the cable for like 20 bucks from C&D racing

jsmith2232
05-13-2006, 07:54 PM
Alright I got my carb, am waiting on a cable I just want to make sure i got everything down. I will need to move my airbox closer to the carb, fab up a new choke lever, grind and heat air boots to fit the carb, tie off the electrical connections, is there anything else and has anyone tried removing a choke on these like I did on my stocker.?

ladyluckracing
05-13-2006, 11:05 PM
hey, we just got our 426 off the dyno at N motion in Wichita yesterday it ran a 190 main with the 450 r carb it was still running a little lean but when they went to a 215 it was way to fat. the motor was built by ladyluck racing 426 12.5 to 1 je piston port and polish oversized valves, springs, hardened rockers, web cams, full procurcuit exhaust, uni filter and when we dyno it blew the clutch apart at 38 hp. now it's sporting barnet clutches.

goinnukinfutz09
05-14-2006, 06:30 PM
Hey jsmith2232 that should be all you need, it'll just take a little time and muscle.haha. Anyways ladyluckracing i run a 190 main in my carb and im sporting a 440 kit. Currently it runs great so i dont know if it's just because of the 426 or what but if you hear any news bout lean/rich post it because everything will help!!!

smartypants
05-15-2006, 11:01 AM
Originally posted by ladyluckracing
it's sporting barnet clutches.

sorry to hear that.:ermm:

QuadJunkies
05-15-2006, 11:03 AM
Best of luck with the Barnett.. I personally had them and did NOT like it and switched after only one week. I found stock MUCH, MUCH better.

jsmith2232
05-18-2006, 09:34 AM
ahatcher21 It sounds like your getting too much gas when it bogs, try dropping the main a bit, is it popping when hitting the throttle or on decel.

Is the hotstart the pull knob on the 450r carb, and does it need to be removed?

EX Stud
06-18-2007, 11:03 AM
i just recieved my 450r carb last week, i bought it off ebay for $50 and it came with a dynojet kit with it....

so what would be a good starting point for me and my set-up in my sig?? I'll take it apart to see what is in it right now, he said he had it set up for a 450R with a pipe on it....