I bought 2023 cforce 625 at 390 km last week and i made more than 100 km until now but at first take off it when i hit the throttle lever smoothly and slowly it makes little bit jerkness i'm thinking about to check the belt but there is no weird sound or smell when i ride at the mountain .. and also planning to get a belt as speare . Ultimax or gates workhorse would be a good choice ? Does anyone has an experience with these belts ?