Engine Milwaukee-Eight® 117Bore 4.075 in. (103.5 mm)Stroke 4.5 in. (114.3 mm) Displacement 1,923 cc (117 cu in) Compression Ratio 10.2:1 Fuel System Electronic Sequential Port Fuel Injection (ESPFI) Exhaust Dual, with crossover Drivetrain Primary Drive Chain, 34/46 ratio Gear Ratios (overall) 1st 9.593 Gear Ratios (overall) 2nd 6.65 Gear Ratios (overall) 3rd 4.938 Gear Ratios (overall) 4th 4