OK Finished rebuilding over the winter new motor, .20 over, super stock pistons, shaved head, all new seals and new crank stock stroke, stock carbs, fatty pipes, k&n filter, open air box. 32:1 fuel ratio. jetting as of now is 290 mains 27.5 pilots, and needle in middle clip. Run the bike on flat pavement or dirt road and it runs well, but in sand it bogs like hell, even with paddles on, could barily make it up bull gap in MI this weekend, even when i drop the clutch in 1st it bogs in the send unless i have the throttle pretty much pinned. i was messing with the needles and that didnt seem to help. when i do get on the pipe it runs ok. the plugs are a little dark but i havent fouled any. any help would be appreciated.