Built for racers who demand absolute reliability, Marine Crankshafts are fully forged and precision-finished from premium E4340 aircraft-grade billet steel. Trusted by DME Racing’s championship-winning team bikes, these crankshafts deliver the strength, balance, and performance you need to push harder on race day. FEATURES Unmatched Strength & Durability – Triple heat-treated for extreme toughness under the most punishing race conditions. Optimized Oiling System – High-speed straight-line oiling ensures consistent lubrication at maximum RPM. Dynamic “No Holes” Balance – Engineered for smoother operation and reduced vibration at high horsepower levels. Lightened for Performance – Through-pin lightning holes reduce rotating mass without sacrificing strength. Superior Wear Resistance – Ion-plasma nitride finish provides outstanding journal surface hardness and extended service life. Race-Ready Weight – At just 21 lbs. (vs. 24.6 lbs. stock), these cranks shave off critical pounds for quicker acceleration. FITMENTS – HAYABUSA G1 (1999-2007) 5MM ( 2MM) 66MM ( 3MM) 68MM ( 5MM) 72MM ( 9MM) 74MM ( 11MM) 77MM ( 14MM) FITMENTS – HAYABUSA G1 (2008-2020) 65MM ( 0MM) 66MM ( 1MM) 68MM ( 3MM) 72MM ( 7MM) 74MM ( 9MM) 77MM ( 12MM) FITMENTS – GSX-R1000 (2001-2008) 63MM ( 4MM) 65MM ( 6MM) 67MM ( 8MM) FITMENTS – GSX-R1000 (2017 ) 59.1MM ( 4MM) 61.1MM ( 6MM) 63.1MM ( 8MM) 65.1MM ( 10MM) OEM Stock Stroke Hayabusa G1 (1999-2007) 63MM Hayabusa G2 (2008-2020) 65MM Hayabusa G3 (2022 ) 65MM GSX-R1000 (2001-2008) 59MM GSX-R1000 (2009-2016) 57.3MM GSX-R1000 (2017 ) 55.1MM ABOUT E4340 Stainless Steel E4340 is a highly alloyed, electric-furnace processed; vacuum degassed grade, which conforms to the rigid aircraft standards of AMS-2301. It contains approximately 0.8% chromium, 1.8% nickel, and 25% molybdenum. Combining these elements assures deep and uniform hardness when heat-treated, particularly when oil is quenched. It possesses exceptional ductility and toughness and remarkably high fatigue strength, snaking E4340 the steel for highly stressed parts operating under heavy-duty conditions. It also maintains its strength and hardness while operating under extremely elevated temperatures. E4340 is most typically used in highly stressed parts that must operate under severe conditions. It is commonly used in the aircraft and missile industries. ABOUT MARINE CRANKSHAFT Marine Crankshaft, Inc. is a leading repair and modification crankshaft shop, operating for over 30 years, and manufacturing custom billet crankshafts since 2007. Dedicated to quality, value, and exceptional customer service, Marine Crankshaft, Inc. services clients worldwide throughout the Americas, Europe, Australia, New Zealand, the Middle East, and beyond! We provide a wide array of crankshaft repair services for Automotive, Motorcycle-Power Sports, Import, Outboard Marine, and Billet crankshafts. Marine Crankshaft, Inc. utilizes the experience, knowledge, and customer care for your crankshaft repair or manufacturing needs.
