Description Crankshaft 8.1 R-18 for Fireblade, Polini P.R.E., Passion crankcaseAbsolute high-end racing crankshaft from Italian tuning specialists OttopuntoUno (8.1), designed with a 47 mm stroke and 100 mm conrod for Polini P.R.E., 2Fast Passion, and 8.1 Fireblade engine cases.OttopuntoUno R-18 – High-Performance DesignThis is a high-end racing crankshaft made of high-quality steel, with 100mm connecting rod and 18mm crankpin. The crankwebs have a diameter of 84 mm, perfect balancing of the crankshaft is achieved by tungsten inserts. Construction and balancing are perfectly designed for the 100 cc cylinder 8.1 from Ottopuntouno. The crankshaft was developed for use with an OttopuntoUno cylinder, but can of course also be used with other 100 cc cylinders with 47mm stroke.The R-18 version is intended for Polini P.R.E., 2Fast Passion, or 8.1 Fireblade crankcases. Light machining of the case is required to accommodate the large 84 mm crank webs.Specifications – OttopuntoUno R-18 CrankshaftStroke: 47 mmConnecting rod: 100 mmCrankweb diameter: 84 mmSmall end bearing: 14x17x17 mmCrankpin: 18 mmBalance factor: 50%Weight: 2.05 kgFor Polini P.R.E., 2Fast Passion, and 8.1 Fireblade casesMade in Italy Questions about the product

• Brand: Ottopuntouno Racing Parts
• SKU: OPU020
• Availability: Currently not in stock

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