by KRCRFs » Thu Jan 04, 2007 6:43 am
This can also happen if you have messed around with your geometry, like installing a lowering link (Kouba), etc.
In my case, when I lowered my 250X, I had head shake in the top end of 4th and all of 5th gear. I solved it by changing both my front and rear sprockets, thus widening the stance slightly.
Kim's: 04 250X
13/51 with +11
Main Jet: 138
Air Screw: 2.5 Turns
Kathy's: 04 230F
13/48 sprockets
Main Jet: 132
Air Screw: 1.5 Turns
Common:
Pilot Jets: 42
Stock Needles: 4th Pos
No Screens or Baffles
Open Air Boxes, Twin Air Filters