Hi. I have a 2009 Grizzly 700 which is totally standard. Over time with use I have noticed the engine braking getting stronger and stronger. It is at a point now where it is too strong for my liking. I have researched on here and have gathered that this is because my V Belt has slowly worn over time. The rear tires are half worn as well which would be contributing to it I think.

I have checked the V Belt width, it is 31mm wide and still within spec. A new belt is 33mm.

What I want to ask is if I file down the collar inside the primary sheave 2mm and leave in the current 31mm belt, will this bring the gearing and engine braking back to the same amount as when the bike was new with a 33mm wide belt?

Is this the right way to go to mod the bike and achieve what I want? I could just put on a new belt but I thought this mod would be a cheaper way to do it. When the belt wears further then I can put on a new belt and shim the collar back to standard right?

Thanks for any help.