The clutch plates are dragging. This causes the clutch shaft to turn even when the bike is in neutral and the clutch is dis-engaged ( handle pulled in ). When the shift fork moves to engage 1st gear, the bike jumps due to the shaft rotation. When was the last oil change? Dirty oil can cause clutch drag. Also, are you using synthetic lubricants? Some of them can swell the cork on the friction plates and that swelling causes dragging.
190 views
Usually answered in minutes!
×