Electric impact wrench 3/8 size. Works perfect and I've never stripped anything. I went for SnapOn one and have been using /abusing it for like 7 years now. I wouldn't fuss with the clutch pulley holder, impact works great once you get used to how tight to go. You cash get decent craftsman ones at sears for like $100 with lithium batteries. Useful for everything on your scoot, seat bolts, doing tires list goes on.