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View Full Version : Need Info On 39fcr Carbs, Girly Pics Included


DCREIF
06-28-2003, 04:23 PM
DOES ANYONE KNOW IF ANY OF THE FCR 39MM CARBS WILL WORK ON THE 400EX, SUCH AS THOSE ON, YAMAHA'S, KTM'S, AND HONDA CRF'S, OR IS THERE A DIFFERENCE?


IF I GO TO AN FCR CARB WHAT TYPE OF THROTTLE CABLE WILL I NEED TO USE WITH THE STOCK THUMB THROTTLE?

ANY INFO WOULD BE APPRECIATED.

NO GIRLY PICS, JUST WANTED SOMEONE TO HELP!!!:devil:


THANKS:) ;) ;)
H_W
06-28-2003, 04:31 PM
Yes, I have a 39 mm FCR carb on my 400ex. It works extremely well. You will need a different throttle cable to hook up to the thumb throttle. I ordered my carb and throttle cable from C & D Racing.
DCREIF
06-28-2003, 05:12 PM
I'M TRYING TO FIND A USED CARB AND WAS WONDERING WHAT FCR CARB WOULD INTERCHANGE WITH THE 400EX.

KTM, HONDA, YAMAHA, HARLEY, ETC.

I DON'T KNOW IF ALL FRC39 CARBS ARE THE SAME, I DO KNOW THAT I MAY HAVE TO CHANGE THE INTAKE BELL, IF THIS CAN BE DONE.

WHAT WEB ADDRESS CAN I PURCHASE PARTS FROM, CAN'T FIND C & D RACING


SOMEONE PLEASE HELP, I'M LOST.


THANKS,
H_W
06-29-2003, 05:27 AM
C & D Racing is the primary sponsor of this web site. You can call the big flashing number at the top of this page to contact them. They may be able to answer your questions.
JD400exrider
06-30-2003, 12:19 PM
H W

Did you notice a big difference in power. Any complaints. How was the jetting right out of the box from C&D
norcalatver
06-30-2003, 12:28 PM
JD400exrider, just break down and spend the coin on the FCR. You know you'll love it! I love mine!
Chef
06-30-2003, 12:29 PM
The 41 will fit as well, but the airboot requires some re doing if you run the aftermarket intake bell.
BigThumper33
06-30-2003, 01:48 PM
Why not just buy a crf450's FCR40mm off service honda for a lot cheaper than what the FCR39mm's are going for? From what I read the 40mm is a better carb
bmw500hp
06-30-2003, 02:02 PM
Originally posted by BigThumper33
Why not just buy a crf450's FCR40mm off service honda for a lot cheaper than what the FCR39mm's are going for? From what I read the 40mm is a better carb

True, cheaper :p a little detail on this one would be good!
Taco
06-30-2003, 02:06 PM
I believe the FCR off of the CRF requires some special mounting considerations. I believe Rocky Ridge sells em.
BigThumper33
06-30-2003, 03:01 PM
A guy I know has one on his z400. As far as I know he got it to hook up quite easily. I just don't see spending 500 bucks for an fcr 39 when I can get a 40mm at service honda for around 300 bucks... and the 40mm is a better carb. GT thunder said the 40mm was better because the "throttle pump....you know the thing that shoots gas immediately when you hit the throttle...I can't remember the name!" it is supposedly a lot better of a pump and is better suited for the bike.

Sorry I'm not being very specific the name of that piece has completely left my mind!

If a 41mm fits, I don't see how a 40 wouldn't!
Waynes400ex
06-30-2003, 07:56 PM
I didnt even think about this carb on the 400ex but i dont see why it wouldnt work. I believe someone told me they think a honda rancher throttle cable works on the 39fcr so why not the 40 right? What all would need to done and bought for this carb to work on a 400ex ? Thanks in advance for the info guys.
YZROOSTINYA
07-01-2003, 01:18 AM
accelerator pump
07-01-2003, 02:18 AM
Originally posted by Taco
I believe the FCR off of the CRF requires some special mounting considerations. I believe Rocky Ridge sells em.

Ken at Rocky said he gets more HP outa the CRF custom 40 carb than either 39 or 41 FCR. I think the cost is around $300..
Taco
07-01-2003, 02:40 AM
Originally posted by Rico
Ken at Rocky said he gets more HP outa the CRF custom 40 carb than either 39 or 41 FCR. I think the cost is around $300.. How about a phone number?
07-01-2003, 02:45 AM
Originally posted by Taco
How about a phone number?

How about you STF.....ahhhhhhh nevermind..

270-259-9604
Taco
07-01-2003, 02:46 AM
I just shut the front door. Is that what you wanted?
:confused:
F-16Guy
07-01-2003, 03:09 AM
The only real difference between the carbs that I could think of would be a throttle positioning sensor, but the 400ex doesn't require it, so you could just leave it disconnected. The '03 CRF carb is $339 from Service Honda.
UglyMotha™
07-01-2003, 05:27 AM
where's the girly pics :confused: :(
BigThumper33
07-01-2003, 11:43 AM
Rico...I love being right! :p :D
Glamis400ex
07-01-2003, 01:48 PM
so, lemme git this straight...

I can get a 40mm CRF carb to put on my 416,....it's better AND cheaper than the FCR 39mm???

Where do I sign up? Can anyone verify this as being true??

Glamis
sharpshooter
07-01-2003, 02:00 PM
does anyone run any of these carbs on a completely stock motor or should you at least have changed the cam and piston before worrying about a carb?
can a stock motor run properly with this much of a carb on it?
Glamis400ex
07-01-2003, 02:03 PM
would probably only give you limited/minimal results. Build the motor then you'll need one.

Glamis
BigThumper33
07-01-2003, 02:56 PM
Yes the 40mm is better than the 39. Go to the GT Thunder website or call Rocky Ridge, they both will tell you that the 40mm is better, and ALOT cheaper than the 39! Hell, the 40mm comes stock on the crf450!
Glamis400ex
07-01-2003, 03:05 PM
Big Thumper,

I went to GT Thunder, but couldnt find that info anywhere....:confused:

Glamis
BigThumper33
07-01-2003, 03:34 PM
I can't remember where it was. It wasn't really an article just a small bit about how the accelerator pump on the 40mm is more well suited to its use in a quad motor or something along those lines... I've seen dynos on 39mm and 41mm's and on one 440 the increase between the 39 and 41 was only .3 horsepower... If the 40mm is better than both, hell yeah thats awesome, even if it was the same as both of them....your still spending 200 bucks less!
Glamis400ex
07-02-2003, 01:30 AM
I just recived a reply from an e-mail I sent to GT Thunder.

He states that he will not run that carb due to mounting/clearance issues that will shorten the life of the carb.

Straight from the horse's mouth...:(

Glamis
BigThumper33
07-02-2003, 12:49 PM
that totally sucks... i know it fits a z400 fine.

Did he mention where the mounting issues were....there has to be someway to fix this problem....I just don't want to spend 200 bucks more on a lesser carb!
Glamis400ex
07-02-2003, 01:38 PM
Big Thumper33,

He did not go into specifics about what those mounting and/or clearance issues may be, as he gets over 200 e-mails per day... That sux...I know, I was really looking forward to some great new info at a reasonable price.

Glamis
BigThumper33
07-02-2003, 04:50 PM
I wouldn't give up yet. Call rocky ridge and see what they say. There has to be some way to make it fit. I haven't lined up a 39 up to a 40, so I don't know exactly what makes them so much bigger....a 41 fits fine....
Glamis400ex
07-02-2003, 05:22 PM
Yah, I may do that. But, you gotta respect a shop like GT, I think they know what they're doin...

Glamis
BigThumper33
07-02-2003, 05:51 PM
He said it would fit...but could cause issues correct? Perhaps we figure out what the issue is, and perhaps a different intake boot or something of that nature fixes the issue and is less than the 150 dollar jump to the 39mm I could see switching it out.

Or I'm going to start looking for a used 39...
Glamis400ex
07-03-2003, 01:20 AM
I feel your pain BigThumper33,;)

The problem with a used 39fcr is that people want as much for used as new would cost now-a-days. I've called several folks on here with used 39fcr's, and they want like $375-425. $hit, for that much, I will just buy new and guarantee myself no hassles.

It's like the guy that wants $5000 for his 18 year old STOCK 250r.

I'll try to do some research...you can too.

Glamis
Taco
07-03-2003, 01:25 AM
Originally posted by Glamis400ex
IIt's like the guy that wants $5000 for his 18 year old STOCK 250r.
Glamis yea but you can't buy a new 250R:D
lil400exman
07-03-2003, 01:58 AM
Originally posted by Taco
yea but you can't buy a new 250R:D it would be kool if ya could tho..........:devil:
BigThumper33
07-03-2003, 04:20 PM
Sure you can! WWW.SERVICEHONDA.COM lol

I know what you mean, guys are selling used 39mm's for the cost of a brand new 40mm and the 40mm is a nicer carb! It totally sucks..

What carb does the yzf450 dirtbike run? I know the new yfz450 quad runs a 39mm. Perhaps we can get it cheap going through a dealer, like servicehonda.com But from my experience with yamaha they really want a lot of money for their parts..

I had to order a new lower a arm for my old warrior....they wanted 180 bucks just for one! I can get one for my ex for like 50 bucks new, and the ex one is a lot better quality. But that was at a dealership, I've never searched the net for yamaha crap.
JD400exrider
07-03-2003, 07:28 PM
I was in the same boat. Used FCR carbs 325.00 to as high as 375.00 . Typicaly on here 375.00. I just received mine from C&D 440.00 with the air screw. 420.00 without. For the difference in money i felt it was worth it. I live in CA. It would cost me over 500.00 from sparks. 450.00 for the carb. + tax + air screw. They did not know what the air screw cost he said 25-30 not sure. Colby and his wife are great to deal with over at C& D

The 40mm sounds like it is worth looking into. I just don't have the time to order differenct parts or do allot of modifying to try to make it work.

Just my .02

Good Luck
07-03-2003, 07:40 PM
SO if the newer carbs are supposedly better (except for the potential "fit" problems) then why are they so much less $$$$ ?
BigThumper33
07-05-2003, 04:27 AM
Because on the CRF450 the 40mm is a stock part.... and servicehonda sells all honda stock parts a lot cheaper than what I've ever found at a dealership.

The 39mm is considered "aftermarket" and companies therefore jack up the prices.

I know the 39mm is stock on the yfz, so maybe yamaha will sell it cheap as a stock part....
Glamis400ex
07-05-2003, 05:55 AM
The new Yami 450 has a 39 fcr. Anyone find out what Yamaha would charge for this carb thru they're parts distributors? A 39 fcr is the same all the way around right? Meaning, a honda fcr would fit on a Yami and so on??

Glamis
H_W
07-05-2003, 09:30 AM
Been gone for a while, sorry for not responding sooner. Yes, I felt a big difference with just adding the carb, but I had already done all my motor mods. The jetting seems to be perfect. All I have had to do was adjust the air/fuel mixture screw. I really like my current setup on my 400.
BigThumper33
07-06-2003, 04:48 AM
It may work, I heard something about a throttle positioning senor on the FCR39 on the YFZ. I'm not sure if they all have it, or if it can be taken off of the yfz to work on the ex. Other than that, I would think they are the same.
H_W
07-06-2003, 07:17 AM
I don't think my carb has a throttle position sensor. I think that my be the only difference.