Don't listen to these posts, beacuse they have no idea, and probably have over 10,000 posts a month. Okay what you need to do is remove the engine drive pulley that connect to a shaft attached to the brake lever. This pulleu (s) keep tension on the drive belt. This plate is attached to the frame via, a bolts that has a brass bushin in it. It is rusted tight, so the full tension is not applied when the brake lever is release, Clean it, put the should bolt in acid for a few minutes, lube it and back together.