Lee-

I'm sure you will get a lot of replies, but here's my stab at it. Super Tigre doesn't make a 4 stroke, as far as I know. Magnum and TT are both OS clones. I have heard good things about Magnum, but not so much about TT. I have a Magnum .80 that I bought used and have just installed. Seems to run fine, but time will tell. I have a Saito .91 which I absolutely love. Runs great and strong with no problems. It would be comparable in price to an OS .91 and about $30 more than a Magnum. Next time I buy a 4 stroke, it will be another Saito.

Saito is also lighter than comparable Magnum, TT and OS models.

-Scott