Hesitation at 30mph

mdkuni

TY 4 Stroke Guru
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06 Apex with 9600 miles. Ulmer air box mod is the only mod. Clutches are in great shape. Exhaust is all pretty much brand new including the donuts. Bumped the CO setting to 10 to clear the lean backfire I was getting with the air box mod, no more backfire now.

There is no bog from a stop or on top. Only when I come down in speed to about 30mph and then hammer it. Any ideas?

It is enough to cause me to not be able to get my skis up over a mound in time before I ride over it.
 
When did it start doing that? After you ajusted the CO or after the exhaust was done?
 
Happened before and after CO setting adjustment. And noticed it after exhaust was done. I can not be certain it was happening before the exhaust or not.
 
Did it do that before you install the mod Air box. Maybe you have a loose collar at the air box.

Those problems are hard to find! You must remember when it started to do it, then undo the modification to see if it's the cause.

Yummy
 


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