OHHHHHHHHHHHHH, well your not gonna know until you have the whole machine so i'd tell them to leave it alone and jet the thing yourself.

 

i called WB they said go one up on the main and 1 up on the pilot but wats stock?

 

iv heard 145 147 and then on yamaha it says #120 so is that the size idk

 

look it up, i think you can find that on yamaha-motor.com

 

yeah it says jet,main (#120) and jet,pilot(#45) soo r those the sizes?

 

yup, tell them to drop in 1 size bigger on both, they will know what to do, the only thing i think will mess that up is your ported and polished, so who knows what your gonna need.

 

so should i go 2 up on the main then??

 

I can't tell you, you have to have the bike to see what it wants, you throw a jet in, go for a full throttle run, pull the plug, if its white you go up, if its black you go down, and do it all over again. its safer being rich then lean, so tell them to go up like 3 and then tune it from there.

 

thanxs but ill just tell them to go 2 up on the main and 1 up on the pilot and just leave it as that

 

the guy at WB told me the easiest way was when u decelerate if it backfires yur to lean and if u accelerate and it bak fires its to rich and when i would b going full throttle it would bog down the second i reach top speed