All the characteristics and improvements of the 2006 4.5i are also found in the "big" Sherco. The 5.1i has a cylinder displacement of 510 cc; the only changes to the engine from the 4.51 are in the bore and the stroke. This required a new cylinder, piston, connecting rod and crankshaft.
This motor is very manageable and continues the Sherco philosophy which requires that the motor be very adequate for the amateur enduro rider. The plan is to provide the rider with a motorcycle that has such usable power that it will not break the arms of the rider in a two minute excursion. A motor that is so tractable that one could almost ride it in a trial.
As is the case with the 4.5i, the riding position is very natural on the 5.1i. For such a large displacement motorcycle it has incredible maneuverability.
With the addition of the Sherco 5.1i, to the extensive line up of Sherco Enduro Models there is good reason to believe that there is a bike that will meet the needs of everyone who is a follower of the Sherco brand.

Sherco plans to actively participate in the Enduro Championship of the World with a top rider in 2006. Sherco is in conversation with several riders at this time looking for a rider who will be the center of this powerful team.
In 2004, Stefano Passeri competed in several World class events on the proto-type 4.5i, in 2005, Sherco was in the background and had Laurent Bouffioux (France), Joan Pedrero (Spain), Stefano Casartelli (Italy) and Michael Vuckcevic (Belgium) ride the bike in several events. In 2006, the plan is to return to the World Enduro Championship with the intention of being competitive at the highest level.