ok i have been working on this bike for a couple days now did a bunch of things to it and finally with the help of some good people on this forum it actually sits there and idles not stalling no smoke hit the gas no hesitation picks right up now iv got some aftermarket parts on this bike fmf fatty fmfpower core2 its bored 20 over and it has vforce three reeds now i got my stock jets in there because the brand new dyno jet kit i bought is a peice of crap. what could happen if i ride with the stock jets i am going to get new ones but will it be ok to ride it this weekend? and whats the best jets or jet kit to get and were i do shop to get them thanks and awk08 is the man you got skills buddy with the help from you and some others got my wifes bike up good look
jetting
- Thread starter osiris10
- Start date
The stock 230 jet will blow your top end with the FMF. You will need to up the main several sizes to be safe. The best jets are OEM Mikuni jets. You will need to buy a range of them. I would say 250-310 would work. Start large and work your way down. There are several jetting guides here if you look.
Here is a jet guide of some what that might help you!
1st idle slow zero to 1/4 adjust air screw to achieve highest idle possible then fine tune for low end response.if the air screw takes more than 2 1/2 turns out, (to idle ) you need a smaller pilot jet if the air screw is less than a half you need a bigger pilot.
2nd mid range 1/4 to 3/4 adjust needle clip position for best mid-range performance,start at #3. if performance is flat or runs very hot go richer (bigger) if it spits sputters like choke is still on, go leaner (smaller)
3rd top end 3/4 to wide open throttle
now if your motor pulls well from 1st thru 3rd gear,but bogs in 4th 5th 6th and your spark plug is black and/or wet use a leaner smaller main jet if performance is crispbut the motor is popping and plug is white go richer (bigger) Your plug should bea very light dry tan color.
Hopes this helps !