<pre>SPECS: Bore: 1.083" (27.5mm)Stroke: .976" (24.8mm)Weight w/o muffler: 589g (20.66oz)Weight with muffler: 765g (27oz)Displacement: .90 cu in (14.73cc)Output: 2.5 bhp at 14,800 rpmRPM Range: 2,500-16,000Width between centers of mounting holes: 50mm (1.97")Length between center of mounting holes: 20mm (.79")Width of crankcase excluding mounting flanges: 42mm (1.65")Length from backplate to front of drive washer: 97mm (3.82")Height from bottom of crankcase to top of head: 108mm (4.24")Crankshaft size: 5/16-24</pre>