I am actually in the process of replacing the crankcase seal right now, and check out the engine bearings. When I try to start my 'ped no matter how hot or cold it is, it's a pain in the ass. And it floods each time after i run it a few miles, and i think it's because the crankcase is filling up with gas/oil because it's a continuos leak at the crankcase gasket, and unleashes all that fluid into the cylinder at times. (my theory) When I took off my base cylinder there was ALOT of fluid behind it, when there isn't supposed to be. Big leak. It is going to be time consuming, but it's worth it to have a more reliable moped.