help x18

[bbbx18boyyy]

ok guys i am done with my x18 build it only took me a year lol

here are the mods i have on it
1.x18 of coourse lol
2.thumpstar 124cc from tbolt
3.x7 plastics, lights
4.sigma 506
5. pister pro throttle
6.22 mikuni carb
7.super bike grips
8. big bore pit bike exhaust
9.gold chain
10.black frame

i put over 1000 into it and i chaned the jets before when i had my stock exhaust and it kept bloggin but i got the new exhaust and i think i need a bigger main jet because its not starting

[The Nutty Professor]

Throw up some photo's and show us what you have to work with.

[X7rocks]

When you put a larger pipe needing a larger jet to compensate may help putting a smaller main jet may help with the low-end but a main jet will work with whatever is higher in the rpms. and if you run a tall gear you must gear a bit leaner for 3rd and 4th gear to run full with power or you may end up gargling the motor with to much fuel.


But first, work with what you have check out why your bike is not running when you have installed the new pipe, even though it should not have stopped working as the pipe doesn't serve that highly in the combustion process, since you said it was bogging before there could be the possibility that you ran to rich and had it foul the plug when trying to tune for the small pipe.