Motoworks Slip On K&n Filter

[GAZ-V-21]

I JUST PUT ON A MOTOWORKS SLIP ON AND K&N FILTER WITH OUTERWEAR SEEMS TO RUN PRETTY GOOD BUT DO I GOTTA JET CARB OR ADJUST AIR FUEL MIX WITH THESE ADD ONS? PIPE AND FILTER I REPLACED WERE BOTH STOCK. SORRY FOR ALL THE CAPS I JUST NOTICED LOL.

[dxcody]

Yes you will need to re-jet.

probably around a 160 main.

Go ahead and bump up your pilot to a 40 or 42, this will make it easier to start in the colder weather and it wont run quite as lean as stock.

[Pipeless416]

160 will be rich for those minimal mods. i think you're looking more at like a 152 main.

[dxcody]

I always ran between 155-160 on mine. But Pipeless knows more about jetting than i do.

[GAZ-V-21]

Will jetting give anymore power? Seems to start great sorry for all the questions but i know you guys know your stuff.

[GAZ-V-21]

Can i just richen the carb for now? If so is the a/f mix screw easy to get to

[trxPOWER]

Some people just make me laugh! You spend 250 dollars on a pipe and filter and dont even wanna jet it? Hell, just run her till she melts down!

[TheAwesomehonda]

4) Main jet: Start with the biggest numbered main jet and run at wide open throttle, the engine should stumble at wide open throttle. Install the next smaller size until the stumble is gone. A general rule is to increase the main jet as long as each jet causes the engine to run as well as or better than the smaller jet in it before. When there is no longer any additional performance gain from the larger jets the jet size is too big - go back down one size.

^^ that is a quote from here http://www.jetsrus.com/FAQs/FAQ_rejetting_101_how_to_rejet.htm

[GAZ-V-21]

Originally posted by trxPOWER
Some people just make me laugh! You spend 250 dollars on a pipe and filter and dont even wanna jet it? Hell, just run her till she melts down! i will jet it if its needed im new to this stuff only been riding a year and a half this is first quad i ever had thats why i was asking thanks for all the helpful info.

[GAZ-V-21]

Originally posted by TheAwesomehonda
4) Main jet: Start with the biggest numbered main jet and run at wide open throttle, the engine should stumble at wide open throttle. Install the next smaller size until the stumble is gone. A general rule is to increase the main jet as long as each jet causes the engine to run as well as or better than the smaller jet in it before. When there is no longer any additional performance gain from the larger jets the jet size is too big - go back down one size.

^^ that is a quote from here http://www.jetsrus.com/FAQs/FAQ_rejetting_101_how_to_rejet.htm thank you you guys are awesome

[Drfat400ex]

If you're keeping the stock lid on, then go 152, my buddy runs a k&n and a t-4 which is very similar to motoworks and 152 works perfect. If your running no lid or an aftermarket lid start at 158 but probably 155 will be the best.

[HondaRacing83]

I havnt got around to rejetting mine yet, i have a motoworks and a uni. ive been riding a lot lately, very minimal pop on decel so it hasnt really been a priority. plus my local dealer doesnt even carry jets -_-

[GAZ-V-21]

Thanks guys ill make appt to get her jetted in next week or so. Are there any other simple mods i can do to gain a little more power?

[TheAwesomehonda]

Originally posted by GAZ-V-21
Thanks guys ill make appt to get her jetted in next week or so. Are there any other simple mods i can do to gain a little more power? A stage two hot cam is relitibly ez to install and there will be a noticable power gain.

[400exjoker]

Originally posted by GAZ-V-21
Thanks guys ill make appt to get her jetted in next week or so. Are there any other simple mods i can do to gain a little more power?


uhh :confused: why even ask what the jetting should be if your going to have a shop jet it? were u just curious or did u try urself and couldnt get it done? there are so many threads on these forums about jetting with loads of info it would be worth not spending the cash at a shop if u do it yourself

[GAZ-V-21]

Originally posted by 400exjoker
uhh :confused: why even ask what the jetting should be if your going to have a shop jet it? were u just curious or did u try urself and couldnt get it done? there are so many threads on these forums about jetting with loads of info it would be worth not spending the cash at a shop if u do it yourself my question was do i need to jet it since putting on new pipe and filter

[kt1148]

you can jet it yourself, it's fairly simple, don't pay a shop to do it. Get a Clymer manual too. I run a 155 main, 40 pilot

[GAZ-V-21]

Cool thanks i actualy might try it myself when i order a jet kit will it come with everything i need. Also what brands do you guys recomend. I was looking at the moose ones

[JOHNDOE83]

I wouldnt order jets from anywhere except www.jetsrus.com

They are real jets not aftermarket stuff like moose or dyno jet.

[GAZ-V-21]

Originally posted by JOHNDOE83
I wouldnt order jets from anywhere except www.jetsrus.com

They are real jets not aftermarket stuff like moose or dyno jet. sweet thanks man i just checked them out pretty good pricing.

[400exjoker]

i ordered from jetsrus all the jets from 152 to 165 and a 42 pilot jet and that cost me 22 bucks with 7 dollars shipping, and the info on here is probably better than any instructions a jet kit will give you lot better than paying 40-60 bucks for a kit

[GAZ-V-21]

One last thing am i safe riding before i jet it with the slip on and k&n filter or do i need to park it until after i jet it thanks in advance for all the help

[TheAwesomehonda]

Originally posted by GAZ-V-21
One last thing am i safe riding before i jet it with the slip on and k&n filter or do i need to park it until after i jet it thanks in advance for all the help Maybe some but the issue with it running lean is it will get hotter and over heat so if your riding for 10 min yeah thats fine but if your riding all day i wouldn't recommend it.

[GAZ-V-21]

Thanks awesome i rode for a little bit yesterday and it did seem a little hotter on the legs than before the pipe and filter

[dxcody]

Originally posted by GAZ-V-21
Thanks awesome i rode for a little bit yesterday and it did seem a little hotter on the legs than before the pipe and filter

Alot of people on here would disagree, but your pretty much fine to ride with a just a slip on and stock jetting IF.... Your just going to be putting around in the yard, or a real light riding.

Slip on without jetting properly only really causes problems to the people who dont jet it and never plan to jet it for that matter, and ride the p*ss out of it for like a year (if it lasts that long) and can actually lead all the way up to a melted piston if its runnning really lean.

But if you want to just ride around for a few days until your jets come in, i would say your fine.

I wouldnt go on a 50 mile trail ride but you get the point.

[GAZ-V-21]

Thanks DX i just ordered a 152 main and 42 pilot from jetsrus i would of gotten a whole kit but funds are very limited after buying pipe filter and nerf bars wifey is gettin a little mad LOL. hope the 152 and 42 will be good for now compared to stock jetting.

[quadmanw]

(I know this was very stupid of me) but I find it funny because I ran a K&N with no lid and a motoworks for about 2 years. I beat the living P*** out of it and raced it almost every weekend. When I got it all taken apart this winter, No melted piston and nothing else wrong. I must have gotten lucky eh? :D

[TheAwesomehonda]

Originally posted by quadmanw
(I know this was very stupid of me) but I find it funny because I ran a K&N with no lid and a motoworks for about 2 years. I beat the living P*** out of it and raced it almost every weekend. When I got it all taken apart this winter, No melted piston and nothing else wrong. I must have gotten lucky eh? :D Wait you did that with stock jets? WOW

[quadmanw]

Yes haha. As I've learned more and more about how important jetting is a realize it was stupid and jetting wouldvr made me a better rider, and a cooler bike lol. Working on the whole jetting this right now.. Lol

[TheAwesomehonda]

Originally posted by quadmanw
Yes haha. As I've learned more and more about how important jetting is a realize it was stupid and jetting wouldvr made me a better rider, and a cooler bike lol. Working on the whole jetting this right now.. Lol Yup jetting is tricky thats why they made efi.

[quadmanw]

I guess I can dream...me and my cousin both race and we're basically a team but I race the 400 and he races his raptor 700.. Plug the little computer thingy in and he was ready to go... Lol

[dxcody]

Originally posted by TheAwesomehonda
Yup jetting is tricky thats why they made efi.

I personally would rather have a $3 main jet instead of a $400 fuel optimizer and i dont like the idea of 3x as many wires on my quad to add to the risk of electronic failure.

Just me and my EFI ramblings... :cool:

[TheAwesomehonda]

Originally posted by dxcody
I personally would rather have a $3 main jet instead of a $400 fuel optimizer and i dont like the idea of 3x as many wires on my quad to add to the risk of electronic failure.

Just me and my EFI ramblings... :cool: Oh i know your right efi costs alot more and can't or is hard to fix when it brakes but you don't screw around with jets and choke.. I to don't want and don't need efi!!!

[GAZ-V-21]

Now that i ordered the main jet and pilot jet is there anything else i need like o rings or gaskets? Also where can i find a instruction manual with some pictures to help me through this process?

[TheAwesomehonda]

Originally posted by GAZ-V-21
Now that i ordered the main jet and pilot jet is there anything else i need like o rings or gaskets? Also where can i find a instruction manual with some pictures to help me through this process? http://clymer.com/Book.aspx?bid=1373&title=Clymer+Honda+TRX400EX+Fourtrax+and+Sportrax+ 1999-2007 < that is a complete honda 400ex serive manual and they have EVERYTHING in there.

[400exjoker]

Originally posted by TheAwesomehonda
http://clymer.com/Book.aspx?bid=1373&title=Clymer+Honda+TRX400EX+Fourtrax+and+Sportrax+ 1999-2007 < that is a complete honda 400ex serive manual and they have EVERYTHING in there.

get a weird page saying potentialy dangerous thread when i click on that

[CJM]

Just google 400ex manual, you can find it online for free usually.

[TheAwesomehonda]

HAHA sorry guys don't click on it..http://www.ebay.com/itm/Honda-Sportrax-TRX400EX-Service-Manual-1999-2007-/140529585913?pt=Motors_Manuals_Literature&hash=item20b8374ef9&vxp=mtr Try that one.

[GAZ-V-21]

Jets are here 152 main and 42 pilot wish me luck im goin in

[01boneless]

good luck..i think itl need to be richer i had 158 with similar mods

[GAZ-V-21]

damn i hope these work better than the stock jets

[chevymanrick]

Originally posted by 01boneless
good luck..i think itl need to be richer i had 158 with similar mods

I agree I have similar mods on mine and I run a 158 and I think I'm still a touch to lean but see how it goes, the 42 pilot really does make a huge improvement in starting a 400 and its idle when cold... Good luck man!

[GAZ-V-21]

A 152 has got to be beter than the stock jet though right?

[01boneless]

yea but i think itl still be lean but try it i could be very wrong it all depends on temps,flow, even temperature

[Rohr397]

Originally posted by dxcody
Alot of people on here would disagree, but your pretty much fine to ride with a just a slip on and stock jetting IF.... Your just going to be putting around in the yard, or a real light riding.

Slip on without jetting properly only really causes problems to the people who dont jet it and never plan to jet it for that matter, and ride the p*ss out of it for like a year (if it lasts that long) and can actually lead all the way up to a melted piston if its runnning really lean.

But if you want to just ride around for a few days until your jets come in, i would say your fine.

I wouldnt go on a 50 mile trail ride but you get the point.

I'd just like to point out that for the record, I ran my Trx450r with a slip-on and did not rejet it. I got over 500 hours out of that top end just doing regular maintenance and I rode it HARD. Some slip-ons will work with stock jetting but it's not a guarantee. It never read lean on the plugs and certainly never had a problem with the motor, can't say the same for the rest of the quad though.

[01boneless]

you know your slip on adds NO power when u dont have to rejet:blah:

[TheAwesomehonda]

^^ Hes right I when up to a 180 main for my full system and i gained lots of power.

[Rohr397]

I still gained power. But Two Bros also claimed it was designed for stock jetting. I had tons of bottom end. Before I couldn't pull a wheelie at all, afterwards I couldn't stop it from doing wheelies.

[01boneless]

it was a joke but if u rejet you will get the most performance

[Rohr397]

agreed haha I was just a noob at the time