I have stolen one of dads sportsters its a 89' 883 , all stock . I have tried to adjust the clutch ever whichaway and still it will lurch froward while starting in gear with the clutch pulled in . It lurches pretty hard , is this normal ? It does it hot or cold but it does not slip at all . Could pops have the wrong oil in it ? Im a newbie rider and work on boats for a living not hd's but im more than capable of doing what ever to it