Sign in or Create an account. See 1 more picture. Buy in bulk and save. What you're getting: The Mikuni Power Jet Kit comes with full instructions and all parts necessary for the modification Includes extra jets for tuning Prevents lean-running during extended full throttle periods, while boosting midrange power For two-stroke motors only Works with any Mikuni VM carb from 30mm through 44mm Very complete instructions Requires one simple machining step, although it can be done with a file and a little patience If you want some extra oomph from your vintage bike or can't seem to get the jetting just right, the Mikuni Power Jet is the easy fix.
Enter your name: optional. Customers also viewed. Mikuni Pilot Jets. Add to cart. Then count the turns from this point to bottoming out, if you take less than 3 and more than 1 complete turns to achieve bottom, the jet is correct and you simply wind back to the centre point.
Job done. If the jet is wrong, either having no stumble in one direction or the centre point being out of the range this will let you know that a jet change is required and weather you need to order richer or leaner jets.
Nothing else other than the pilot jet has an effect at idle. Some engines will actually have two size jets that may fall within the spec in which case see which feels better when riding, generally the richer one. At wide open throttle only the main jet is working so these are also very easy to tune with a few jets and a bit of spare time. The performance changes can be detected at wide open throttle in low gears- we do not recommend the operation of motorcycles over the speed limit.
Change and test with the next size jet both up or down to determine weather an improvement can be obtained and in what direction. If you notice an improvement in one direction, keep changing to the next jet size in that direction till the improvement stops and she drops off the perch , then go back one.
Never drill jets and do remember that most aftermarket jets do not flow correctly. Generally if you have the right profile needle for your engine, a difference in performance and response can be detected by raising and lowering the needle. I'd say a 90 main jet should be ok for breaking in your new kit, then move down after a couple weeks of riding. Powerjet would be useful on some crazy hard hitting pipe setup, I think.
Range of required jetting on and off the pipe too big? Power jet. Also just convert to DC and run fuel injection? Want to post in this forum? We'd love to have you join the discussion, but first:. Login or Create Account. New Topic Go to Topics. Apr 15, AM. Moped has nothin to do with it. May 09, PM.
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