I checked the rear wheel chain tension marks and the wheel is lined up perfect???
I heard that different oil levels in the front shocks might do this?? any idea's??
Check your brakes for dragging or a bent roater. Spoke rims ? check for true and check for tire wear.
Mine "drifts" to the right... windshield, exhaust, my sitting position all are possible contributors... doesn't actually "pull" though.
If alignment is ok, you might want to check the rims - spoke adjustment... dragging brake is also a possibility if its really pulling.
You might want to check the swing arm bearings for play; a bad (loose) bearing could contribute.
49Reo :)