Description Racing Crankshaft Malossi MHR RHQ Yamaha AeroxHigh-end long-stroke crankshaft for horizontal Minarelli engines. Very high-quality crankshaft from Malossi, designed for very powerful tuning and racing setups.Features Malossi RHQ Long-Stroke CrankshaftRHQ stands for Racing High Quality and represents Malossi’s top-level model. Almost every aspect of this crankshaft is high-end: robust full-circle design, ultra-precise balancing, copper-plated connecting rod, premium surface finish, high-quality workmanship, and first-rate material quality.Due to the higher pre-compression, cylinder filling is improved, and the powerband shifts into the higher rpm range. The crankshaft is suitable for engine speeds up to 16,000 rpm.This is a long-stroke crankshaft with a 90 mm connecting rod and 44 mm stroke (instead of 80 mm / 39 mm), and must therefore be used together with a matching Big Bore cylinder. As a reminder: using a long-stroke crankshaft increases displacement and also helps to restore the bore-to-stroke ratio when a larger bore has shifted it out of balance.Installation Malossi MHR Racing Crankshaft44 mm stroke, 90 mm rod, 13 mm piston pin – this is clearly not a plug & play crankshaft.The crankshaft is intended for use with Malossi Big Bore cylinders 86cc or 94cc. Installation requires a 5 mm cylinder base spacer.The crankshaft should be used with a suitable Multivar CVT (M5112800, M5118678 or M5115823). Important: for the Malossi MHR Multivar M5118678, you must use the included ramp plate plus sliding sleeve and spacer bush.And as with many tuning crankshafts: machining the engine case is absolutely required for this crankshaft.Specifications Malossi MHR CrankshaftFor Minarelli horizontalStroke: 44 mmConnecting rod: 90 mmConnecting rod: forged + copper-platedSmall end bearing: copper-plated steelIncludes 13x17x17.7 mm small end bearingIncludes 20x16x45 mm CVT sleeve for Multivar M5112800 + M5118678Includes ramp plate, spacer sleeve, and 22x16x44.6 mm CVT sleeve for Multivar M5118678 Questions about the product

• Brand: Malossi
• SKU: M5317827
• Availability: On demand

Notes and Safety How to change a crankshaft?The crankshaft is one of the main components of the engine and is responsible for the smooth operation of motorcycle, scooter and moped, whether with two-stroke or four-stroke engine. The longevity of the engine depends not only on the proper condition of the crankshaft, but also on the fact that it is properly mounted.For a correct installation of the crankshaft, we recommend our tutorial: Crankshaft disassembly and assembly.How can I tell if my crankshaft is Damaged?A broken crankshaft causes metallic noises, unusual vibrations, leaking oil seals and drastically reduces the performance of the two-wheeler. In any case, the vehicle must be stopped