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jetting help.


badshee1998

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1998, ported cylinders and cases, crank trued and welded, cool head with 20cc domes, 27.5 needle, 350 mains, stock carbs, kandn filters, +4 timing plate, fmf sst exhaust, v force reeds. Is that a good starting point or should i go down more like 340 on main for temps around 50 degrees..

 

340 or 330.. i wouldnt go with 350 :o

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no way to tell untill u run it... see how it runs, start rich and work down

 

well i rode it with the 350s and ran good maybe a little sluggish on taking off, i havent done a plug chop but i pulled the plugs and on the rim and down in the plug looked pretty black and the porcelain was like brown.. rich??

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340 or 330.. i wouldnt go with 350 :o

 

 

Blaster06,

your still a newb at jetting with your own problems man, dont tell people not to try stuff, you dont know.

 

for his locations and area temps his main jetting is more then likely almost spot on. if anything id say remove the 27.5 pilot, get a 25 and adjust your air screw, and needle position. he's probably just rich on the low end, but you should be able to adjust your needle and air screw to fix any low-in bogs

Edited by magz
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I agree... a 25 pilot will definately fix your bogging problem and your mains are prolly spot on as long as it pulls hard on top. You'd rather have it a little rich then run too lean and have an issue. A friend of mine uses 370 mains on almost the exact same setup and his bike is really quick.

 

On my wifes bike, stock port with only a Toomey pipe and a K&N pods I just switched her to a 330 main and it's spot on. Unfortunately every bike is different even if the mods are the same, hence require different jetting. Just make slow adjustments until you are happy with it and you'll be fine!

 

What you don't want to do is take jetting advice from someone that never even asked what alltitude you ride at.... :thumbsup:

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Blaster06,

your still a newb at jetting with your own problems man, dont tell people not to try stuff, you dont know.

 

for his locations and area temps his main jetting is more then likely almost spot on. if anything id say remove the 27.5 pilot, get a 25 and adjust your air screw, and needle position. he's probably just rich on the low end, but you should be able to adjust your needle and air screw to fix any low-in bogs

 

 

hahahahahahah!!!!!

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