Let me go out on a limb and kick open a crate o' monkeys....

I've been an OS fan for a lot of years. Their stuff was always a notch above many of their
competitors where fit and finish, ease of use, reliability, etc, et al was concerned.

The tide has changed somewhat however, and much of the OS product line seems to have merged
with, and become difficult to distinguish from the cheap, knock-off chinese throwaway's. The main difference
being at the checkout. (price)

MVVS is a fairly old company that is building superb quality motors. Easily able to outperform OS in any
comparison IMO. The workmanship, metallurgy, handling and performance are all A#1 first class, at a
price that isn't cheap, but commensurate with what you're getting. I'd place MVVS firmly in the Rossi, Webra
quality class.

It's really a matter of what you need. If you're new to the hobby...buy a cheap knock-off engine to learn the
ropes with. If you've been around awhile...buy the MVVS.

My $0.02

'Race