ok, my bike got dumped over in a parking lot at about 10 mph, i've finally gotten it back in running condition (was leaking oil from stator cover) and now i've got a strange issue. when i rev the bike in gear, with the clutch pulled in, the speedometer will twitch. now, no wires i saw were frayed or damaged, i'm wondering where the sensor for the speedometer is, and how it could be affected by the bike being dumped on the left side.