Ilmor Viper Motorcycle Prototype Engine Takes First Roar

Ilmor announced they have successfully run the first prototype Ilmor - Viper motorcycle engine on the dyno ahead of schedule and are reportedly extremely satisfied with the results. Ilmor has been working on the design and development of the updated Viper Motorcycle 152 cubic inch V-Twin engine since October 2009, when the formal agreement between the two companies was announced.

These developments, intended to both improve performance and lower emissions, include a new crankcase, which has fully integrated oil pressure and scavenge pump sets, a new barrel housing and new cylinder heads.

The bottom end features a higher compression ratio from new piston assemblies with revised crown pocket details, for improved combustion and exhaust emissions.

The crankshaft has been revised to account for the new piston and connecting rod assemblies and reduces overall engine vibration. Moreover, the updated Ilmor-badged engine design retains the polished billet aluminum look of its predecessor.

"Manufacturing of the parts for the Viper Motorcycle - Ilmor badged V-Twin began in late December 2009 and credit must go to all those who have helped contribute to achieving this first milestone,” Steve Miller, Ilmor Engineering, Ltd's Managing Director, said in a release.

“From concept to working prototype in four months is a testament to Ilmor's ability to take on a significant project and deliver in a fast and effective manner. Manufacture of the first production engines is now underway and on target for Viper's product launch in May 2010."

The Viper Motorcycles-Ilmor V-Twin will be featured on the Diamondback Super Cruiser model due to be rolled out in the second quarter of the year.