Help! added new silencer....

[smoke20]

i'll start at the beginning... installed k&n air filter and removed air box lid, added holeshots on aluminum wheels(looks great). rode and ran great, pulled front wheels in first few gears with hard launches(a little suprised!!) and then added FMF turbinecore II Q silencer. lost my hard launches, didn't pull front wheels and at wide open throttle and high speed, seems to sputter. i can let up on throttle a little and it goes away. do i need to re-jet? still running stock mikuni, 230 main according to clymer manual. any help would be great and please don't say buy new carb. jets and other things are cheaper. thanks in advanceI:I

 

[DussinC]

i'll start at the beginning... installed k&n air filter and removed air box lid, added holeshots on aluminum wheels(looks great). rode and ran great, pulled front wheels in first few gears with hard launches(a little suprised!!) and then added FMF turbinecore II Q silencer. lost my hard launches, didn't pull front wheels and at wide open throttle and high speed, seems to sputter. i can let up on throttle a little and it goes away. do i need to re-jet? still running stock mikuni, 230 main according to clymer manual. any help would be great and please don't say buy new carb. jets and other things are cheaper. thanks in advanceI:I

yes you need to rejet the carb, u should have done this already with the k&n filter and when you took the airbox lid off and i hope you dont ride in dusty areas or sand, because k&n filters are bad for letting fine dust through. so rejet and you should be good to go, do a plug chop to be sure.

 

[smoke20]

thanks. re-jet up..240,250? hate to sound nieve but i read the CARB TUNING post and was a little confused. also some have posted that you don't have to re-jet w/ a k&n and it didn't start sputtering till i added silencer.

 

[specialized7]

thats weird that a silencer did that. have you looked at your reeds?
i would up the main jet a size or 2

 

[4cfed]

re jet before you melt her down, me personally id go to a 250, and is the sielncer new? or did you buy it used?? if used take it apart and make sure nothing inside it except for the fiber packing

 

[smoke20]

YES!! thank you and the silencer is new. reeds are fine and i have new ones just in case. will go up a size at a time and report back in a few days. going on vacation next week and will have time to play!!! thanks again

 

[specialized7]

instead of going up a size and reporting back, go way up a size and go down from there, or else youll blow her up.
like im talking try a 270 and go down from there, but i think that would be to big, but you never no

 

[smoke20]

got a 270 and down in hand. i'll try that. thanks!

 

[4cfed]

270 should be a bit much , i ran a 270 with no lid and a full fmf exhaust, had to go up to a 280 once it got over 70 degree out though