Yet another jetting question??

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MotoBK
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Posts: 7
Joined: 03:59 am Dec 31 2009
Country: Southern California

Yet another jetting question??

Post by MotoBK »

2001 KDX 220: 42 pilot, 145 main, Clip in 3rd position from top.

I recently did a wiesco Top End, and Boyesen Power Reeds. I now have bogging(I Think) from 3/4 to Full. It just hits a bog wall and the engine will not rev any more. If I turn the air screw from 1.5 turns to 2.5 then the top end comes back....and it runs strong again. I bought a 142 main, and threw that in it seemed to make things better at 1.5 turns....but I was told that is a bit to lean. I know the process to figure jetting by starting with the pilot...then working to the needle...then the main. I tried droping the needle to the fourth position....and that made things worse as well. I just wanted to know if this sound straight forward to anyone...as far as the way my motor is responding. I cannot tell the difference between a too rich bog, and a to lean bog. Any advice is appreciated.
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