yoshimura exhaust jetting

[BassHunter0123]

Just ordered a yoshi slip on and k & n air filter. does anyone know what rejetting i would need to do for this. i live in ohio. would jetting be different with a slip on and full system? thanks

[BassHunter0123]

any thoughts??

[sprayedgt]

You could try 1 size bigger than stock and see how it runs. Make a full throttle run in 3rd, at the top of the rpm range pull the clutch and kill the ignition. Pull the plug and check the color. If you have a tan color on the plug you know it's perfect.

[BassHunter0123]

weill i e-mailed yoshimura and they say try a 150 main. so ill try that and see what happens. thanks

[MtnEX]

I think it's best to get a few Keihin pilot jets and main jets... and find out by trial and error. In my opinion it's no fun at all to do, but I think it's the only way to learn and get all the circuits dialed in for your mods and elevation.

See if you can find a Keihin jet kit with a 40 & 42 pilot and an array of main jets.