I have the multivar on my peugeot with a full malossi 70cc case/cylinder/head. I have had ZERO problems with the bearings in the multivar and it performs amazing. It lifts my front wheel off the ground if I sit toward the back of the bike. My stock clutch has been fine. I do go through belts regularly... although I only have to change them regularly because they make it harder to start. I've put two years of regular riding on this engine and I've only just recently replaced my starter clutch arms. Still haven't replaced the main cluth disc and I've had to do NOTHING to the multivar, I just periodically pop it off and squirt some grease in there. It is still perfect. (edited)