I think everyone should look all over their moped for grease nipples. since most all of us dont have original owners manuals, we gotta figure this stuff out for ourselves. The belt pulley with the pedals attached (dont know the proper name) on my moped i noticed was wobbling kindof weird at low to mid rpm. then i noticed it had a nipple on there. I pumped grease into it, the wobble went away. its also a bit quieter now. If you dont know what one of these grease fittings looks like, its like a small little metal tube with a bearing in it to keep the grease from coming out and dirt from coming in. if you find one, find a friend with a grease gun or goto an auto shop; they probably wouldnt charge you anything to just pump some grease in.