ok i was riding racing up a hill. Half way up i heard a knocking noise from clutch cover trans area. i shut it off right away. Went home drain trans fluid..Burnt bad.. I removed clutch cover..found the shift star a little piece missing at the end..Wont go into 1st will cylce through all others stops at neutral. Do u guys think that would cause that loud knocking noise or something else smoke in the trans??The star has all the divets in place just a little peice at the end.. Help please