I am in a bit of a panic as I am leaving for Hatfield Mcoy in 6 days.I did a 1.5mm shim mod,couldn’t notice much difference except in low gear.I was messing around in the street in front of the house when it started making a funky grinding sound so I pulled in the garage right away and found the 22mm nut was loose.So I pulled the shims out and put everything back together.It starts and revs fine in neutral,but if you try to put it in gear it jumps,starts that grinding sound and stalls.Try to start in gear it feels like your trying to start a stick shift in gear.Please Help!