[Garryese]

Yes it is faster because it is reving slightly higher.

I know from when I worked at a yamaha dealer that float levels were problem in the 660 grizz. The genisis engines are touchy to fuel requirements. Float levels have to be exactly correct or they suffer from lost top end or they develope the dreaded studder on steep hills.

Quads come jetted for sea level and thus are way too fat for our elevation.

Big tires (read heavy), clutch kits, most exhaust systems, storage boxes, fairings and fender flares all reduce top speed.

Typically an out of the box 660 grizz will do 97 - 100 Kmh. Jetted properly with proper float level they will do 100 - 105.