2003 Arctic Cat ATVs from 250cc to 500cc Service Manual, Page 371Get this manual
32If removed, install the spark plug and tighten to 1.7 kg-m (12 ft-Ib)Lower front: One cap screw, nut, spacer, and washerTighten
nut (topside of engine)Tighten only until snug ALower rear: One cap screw and nut with flat washerTighten only until snug
3Tighten the engine mounting fasteners to the following specifications BUpper rear: Loosely fasten the left-side engine mount-to-frame
cap screws; then install the cap screw wnut and flat washerTighten only until snug ALower rear and Lower front to 5.5 kg-m
(40 ft-Ib)BUpper front (inside the bracket) and Upper front (topside of engine) to 2.8 kg-m (20 ft-Ib)CUpper rear left-side