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I recently picked up a 50cc agility. It was running fine, but it was in need of a new belt. The old belt was worn down from 18mm to 15mm. By hand we pulled the rear clutch/pulley in order to get the belt out. After we put the new belt in I have experienced difficulty accelerating and it sounds as if the belt is loose. The only thing I can think of is the fact that the clutch won't shut ever since we pulled it open by hand. Can anyone help? I've run out of things to try.
Thank you!