BAMA07 Posted June 25, 2007 Report Posted June 25, 2007 I was wondering on a stock motor what size mill carb should i be getting, and how do i go about chosing the dome cc on some new noss heads. When i get a new carb how many upgrades will i need to make it work??(i am leaving the airbox on btw) Quote
FredMW Posted June 25, 2007 Report Posted June 25, 2007 I was wondering on a stock motor what size mill carb should i be getting, and how do i go about chosing the dome cc on some new noss heads. When i get a new carb how many upgrades will i need to make it work??(i am leaving the airbox on btw) Buying carbs for a stock motor is a waste of money. What type of riding do you do? Plan your mods around your riding style. JMO Quote
BansheeDan Posted June 25, 2007 Report Posted June 25, 2007 Buying carbs for a stock motor is a waste of money. What type of riding do you do? Plan your mods around your riding style. JMO my bike is almost 70 hp tp the wheels and i have stock carbs..... bigger are a waste of money......it will kill your low end till you start porting as far as domes for a stock bike prolly 20 or 21 cc would be perfect Dan Quote
bonbon Posted June 25, 2007 Report Posted June 25, 2007 Stick with your stock carbs until you start doing porting and other major mods like that. As far as domes go, it all depends on what you want your compression at and type of fuel you want to use. Up to ~165psi you can get away with premium pump gas usually but any higher and you need to start mixing in race gas or AV gas. Depending on your elevation, if your around sea level you may be able to get away with 20cc domes and run 93 or just go with 21's and be safe and still run 93 octane. Do a compression test to be for sure though. Quote
dajogejr Posted June 25, 2007 Report Posted June 25, 2007 I'm gonna disagree to a point. Going to 33 or bigger carbs would be a waste on a stock motor. However, I think a set of 28PWK Keihins would be a nice change. They are much easier to work on and will probably add a little power every where. They are just much, much easier to work with than the stockers, even after you remove the TORS. However...that being said, you're gonna spend a few bills on carbs, new or used. You can spend that money elsewhere. As far as your head.... What elevation are you at, and do you want to run pump gas, race/pump gas mix, or straight race gas? I caution about going too high on the compression unless you're willing to split the cases and have the stock crank trued and welded. Once you put more stress on the bottom end, the stocker is gonna come apart eventually....I've seen them separate on stock motors, let alone motors with more compression.... Quote
BansheeDan Posted June 25, 2007 Report Posted June 25, 2007 I'm gonna disagree to a point. Going to 33 or bigger carbs would be a waste on a stock motor.However, I think a set of 28PWK Keihins would be a nice change. They are much easier to work on and will probably add a little power every where. They are just much, much easier to work with than the stockers, even after you remove the TORS. However...that being said, you're gonna spend a few bills on carbs, new or used. You can spend that money elsewhere. As far as your head.... What elevation are you at, and do you want to run pump gas, race/pump gas mix, or straight race gas? I caution about going too high on the compression unless you're willing to split the cases and have the stock crank trued and welded. Once you put more stress on the bottom end, the stocker is gonna come apart eventually....I've seen them separate on stock motors, let alone motors with more compression.... you think 28's would help my bike dave???? just curious if i would really feel a "seat of the pants" difference Dan Quote
dajogejr Posted June 25, 2007 Report Posted June 25, 2007 you think 28's would help my bike dave????just curious if i would really feel a "seat of the pants" difference Dan I think YOUR motor would probably benefit from 33s.... It runs very well for a light port job from A&S. I'm biased a bit, though.... I work on a lot of stock banshee carbs, and they're a pain. PWKs are SO much nicer to work on....and don't have the slide sticking problems that seem to plague the stockers here and there. Dan...your motor is ported, not sure on the extent of that. I'd love to see your bike run with some bigger carbs, I think Dan could easily dyno yours again for comparison. You may move the HP and Torque curve up another 1500 to 2000 RPM, but you'd also pull harder on top. And...since you were flat tracking (I think you said you got out of that)....you want that peak or higher RPM HP. You already know you want it for the dunes. I think your motor would like some 33s.... It wouldn't kill your bottom, and add mid and top. I think you'll get more HP, and better throttle response as well... Quote
BAMA07 Posted June 25, 2007 Author Report Posted June 25, 2007 yeah thats the problem i wanna fix on the carbs there a pain in the ass to work on and jet. The tors dont help the matter either someone told me about a kit u can replace the tors with anyone have a link? I wanna run 93 still and im at sea level and ride woods/dirtroads/road/and just recentlly found a dune to ride at. so 21cc domes? or what Quote
dajogejr Posted June 26, 2007 Report Posted June 26, 2007 21cc domes and +4 timing. You can get the TORS removal kit from just about eveywhere....I'd start with site sponsors. Jeff @ FAST....give him a call.. www.farmandsandtoys.com Quote
ToomeySheeLE Posted June 26, 2007 Report Posted June 26, 2007 I have a set of New Kehein 28pwks with Uni dual stage pods I'll let go of for 300$ shipped.. Ended up getting way more motor work done than first expected and have since goine with 35pwks... 28's will give you more throttle responce and top end, even on a stock motor. Quote
BAMA07 Posted June 26, 2007 Author Report Posted June 26, 2007 with the 28's they should just line right up without to much trouble right or would i need to get some parts to convert it? Quote
dajogejr Posted June 26, 2007 Report Posted June 26, 2007 You would need a different throttle cable, the one that comes in a TORS removal kit. That will work with the PWKs... You MAY have to buy reed spacers, I'm not sure if the 28PWKs will hit the clutch arm on the left carb or not, I"m sure ToomeyShee can tell you. I know the bigger carbs do, not sure about 28's. You'll need different air filters if you plan on going pod style. You may or may not need new boots if you plan on still using the air box. Again...TS can probably verify... Quote
J-Madd Posted June 26, 2007 Report Posted June 26, 2007 Stock boots should fit over the 28 mms. I had some 30's and the stock K&Ns would fit (barely). Other than a throttle cable and some jets, you should be good to go with the 28's. Quote
dajogejr Posted June 26, 2007 Report Posted June 26, 2007 Stock boots should fit over the 28 mms. I had some 30's and the stock K&Ns would fit (barely). Other than a throttle cable and some jets, you should be good to go with the 28's. I meant the carb bell to air box, not the intake boots. I know you can stretch the intake boots to 28... What about the airbox boots?? Quote
fastbanshee8 Posted June 27, 2007 Report Posted June 27, 2007 I meant the carb bell to air box, not the intake boots.I know you can stretch the intake boots to 28... What about the airbox boots?? The airbox boots will fit, but you will have to stretch them a little. Also, when I had 28's on mine, I found out that cutting about 3/8"-1/2" off of the plastic tubes going into the airbox, made installing, and removing the carbs much easier. Just leave enough of the plastic tube, to get the boots clamped on good, and secure. Quote
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