This is the GS45 ABC Sport Engine from SuperTigre. *** 3-YEAR Warranty *** FEATURES: ABC cylinder and piston (An "A"luminum piston with a "B"rass "C"hromed cylinder sleeve) Two crankshaft ball bearings Schnuerle porting A NEW silent muffler One-piece crankcase A twin-needle throttled carburettor INCLUDES: One Glow Plug (FOXG1400) One Silent Muffler with Header One Set Operating Instructions One parts list One Set SuperTigre Decals SPECS: Bore: 21.85mm (.860") Stroke: 20mm (.787") Weight w/o muffler: 377g (13.22oz) Weight with muffler: 524g (18.5oz) Displacement: .46 cu in (7.5cc) Power Output: 1.45 BHP at 16,000 RPM RPM Range: 2,500-16,000 Width between centers of mounting holes: 42mm (1.65") Length between centers of mounting holes: 19mm (.75") Width of crankcase excluding mounting flanges: 34mm (1.34") Length from backplate to front of drive washer: 83mm (3.15") Height from bottom of crankcase to top of head: 85mm (3.35") Crankshaft Thread Size: 1/4-28 Suggested Props: 10x6 or 9.5X6 10x7 for break-in Carb Settings: H-2-turns out from closed position. L- Take carb off, rotate and look at bottom side. Turn trottle until wide open, set tip of low end needle half-way across cat eye. REQUIRES: FUEL: 18% oil content MINIMUM. A synthetic/castor blend is highly recommended. 10%-15% Nitromethane will work well. Higher levels of of Nitromethane may require adjustment of the compression ratio to prevent detonation. MGC 8-22-00 JBN 8.10.94 ir/jl MAF4/29/99 updt jxs 2/12/04 updt lmm 3/26/08