Bore and Stroke 72 mm x 48 mm Compression Ratio 11.6:1 Valve Train VTEC chain-driven DOHC, 4 valves per cylinder earlier versions were non-VTEC, gear driven DOHC, 4 valves /cylinder Pre-cat converter delivered 110 BHP Fuel Delivery PGM-FI fuel injection Starter Electric only 6-cylinder The Honda CBX motorcycle (1978–1982) contains a 1047cc inline-6-cylinder engine. The engine used a DOHC 24-valve cam-over-bucket valvetrain to support high RPMs. Power equipment General-purpose engines Current Honda general-purpose engines are air-cooled 4-stroke gasoline engines but 2-stroke, Diesel, water-cooled engines were also manufactured in the past. The current engine range provide from 1 to 22 hp (0.7 to 16.5 kW). More than 5 million general-purpose engines were manufactured by Honda in 2009. Approximately 70% of the general-purpose engines manufactured by Honda are supplied as OEM engines to other manufacturers of power products. Current range (US & Europe) 1-cylinder GX series Horizontal shaft GX100 (OHC) (2002–) (98cc) GX120 (OHV) (1991–) (118cc) GXR120 (OHV) (2013–) (121cc) GX160 (OHV) (1991–) (163cc) GX200 (OHV) (1995–) (196cc) GX240 (OHV) (1986–) (270cc) GX270 (OHV) (1991–) (270cc) GX340 (OHV) (1986–) (389cc) GX390 (OHV) (1991–) (389cc) Vertical shaft GXV160 (OHV) (1987–) (163cc) GXV340 (OHV) (1986–) (337cc) GXV390 (OHV) (1990–) (389cc) iGX series Horizontal shaft iGX240 (OHV) (2010–) iGX270 (OHV) (2010–) iGX340 (OHV) (2010–) (388cc) iGX390 (OHV) (2010–) (389cc) iGX440 (OHC) (2005–) (438cc) GC/GS series (OHC) Horizontal shaft GC160 (1997–) (160cc) GC190 (2003–) (187cc) GS190 (2004–) (187cc) Vertical shaft GCV160 (1997–) (160cc) GCV190 (2003–) (187cc) GSV190 (2004–) (187cc) GP series (OHV) (European market) Horizontal shaft GP160 (?–) (163cc) GP200 (?–) (196cc) Mini 4-stroke series Horizontal shaft GX25 (OHC) (2002–) (25cc) GX35 (OHC) (2005–) (35cc) GXH50 (OHV) (1999–) (49cc) Vertical shaft GXV50 (OHV) (1999–) (49cc) GXV57 (OHV) (?–) (57cc) (European market) 2-cylinder (V-Twin) GX series Horizontal shaft GX630 (OHV) (2009–) (688cc) GX660 (OHV) (2009–) (688cc) GX690 (OHV) (2009–) (688cc) Vertical shaft GXV530 (OHC) (2003–) (530cc) GXV630 (OHV) (2009–) (688cc) GXV660 (OHV) (2009–) (688cc) GXV690 (OHV) (2009–) (688cc) GC series (OHC) Vertical shaft GCV520 (2003–) (530cc) GCV530 (2003–) (530cc) HD series (diesel) HD6500 (G390) (2004–) HD7500 (G395) (2004–) Past models Early models (all 1-cylinder, air-cooled) type-H (1953–?) (2-st., 50cc) type-T (1954–?) (4-st., side-valve, 130cc) type-VN (1956–?) (4-st., side-valve, 172cc) T10 (1962–?) (4-st., side-valve, 19.7cc) (training purpose only, not marketed) G20 (1963–?) (4-st., side-valve, 132cc) G25 (1966–1969) (4-st., OHC, 59cc) G28 (1969–1977) (4-st., OHC, 67cc) G35 (1976–1980) (4-st., side-valve, 144cc) GV35 (1976–1979) G40 (?–1969) (4-st., side-valve, 170cc) G41