Maintenance & Technical > KX500 Original
2000 KX500 Project
sandblaster:
Hmmm.
Use to be .087"
Now it's .086"
Why the change?
alward25:
maybe bad memory, try either or
sandblaster:
:-P
Pmcg:
So I need some jetting advice. My bike is still really hard to start despite playing with the timing all over the place and doesn't want to idle. The motor is a bit bored out at 88mm, some port work, windowed piston, vf2 reeds, pc pipe and a nature friendly silencer type 296 I think. I also have the Penton lighting kit. Bike will run start ok but doesn't have that 500 bottom end torque. It will wheelie every gear once the valves open but doesn't feel right down low. I was reading that a bigger bore needs smaller jets and am pretty sure that I'm running rich from looking at the plug. I'm currently at 168. 55. 1.5 turns. Stock needle middle clip. What's the smallest I should go before risking motor damage? Should I jet down on both? Any advice is appreciated.
sandblaster:
Bigger bore = smaller jets
How small is too small?
Depends on your altitude and engine condition.
What altitude are you riding at?
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