X4 jetting help.

vtrider · Apr 22, 2008

I just picked up a x4 motard from the boys at pitster and I seem to be having a little bog in the first 1/4 of throttle. anyone have any setup help for me? Stock gpx150 motor, roughly 5500 feet elevation.

Also, what are some easy mods to really wake up this motor.

thanks!

e-roc · Apr 23, 2008

The best mod you can do is junk that carb and get a mikuni vm26 or an oko. I just got the vm for my x4 and it made a world of difference. I tried with the molkt carb but it's just a pos.

vtrider · Apr 23, 2008

anyone have any setup tips for me with out having to purchase a new carb? what are the stock jets in this carb, and does anyone have any suggestions on setting it up?

Wandell · Apr 24, 2008

I have a 140. I called Pitster with a similar problem. They suggested a 27.5 pilot jet. I ordered a jetting kit from TBolt and finally got it installed last week. It now pulls out of slow corners without bogging.

X4 jetting help.

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