Hey Grok, or anyone else who might know...What is the verdict about cush drives (or lack thereof) on SMs. I've just about decided to say to hell with a new sportbike, and buy a SM. I know of a few great deals on either a CR 500 or a KX right now, and before I commit, I want to know just how big of a negative impact on the driveline, the lack of a cush drive has. I know going with a motocross two-stroke SuperM conversion, I can probably expect engine rebuilds periodically, but I don't like the idea of tranny rebuilds, especially given the costs involved. What can I expect?? I've pondered just buying a purpose built SM, like a KTM or something, but I really want an oil-burner, and I can much more easily afford to do a conversion on a somewhat used motocross bike right now, since I'm going back to school next September.
I plan to put quite a bit of mileage on any bike I build or buy, and I just want the low down on the reliability of two-stroke SMs.
If you re-lace a new rim too most dirt hubs, you still won't have a cush drive.
Hysyde, a cushdrive is a real good idea, especially when you have sticky road rubber and no other shock-absorbing in your drive-line. Some bikes have cushioning in the clutch hub, but busted trannys are inconvenient and expensive. You could relace a dual-purpose wheel or find some ready-made Motard wheels. Some adapt a sportbike's wheel to their machine.
I do know one guy who doesn't run a cush drive on an XR650, but he always gets a new bike every year and only puts on about 1000 kms. He hasn't scrapped a tranny though!