Racer, 90 lbs does sound a bit low, but i'm no mechanic!
What state do you live in?
I had my eye on this 175 from the Wilmington boys:
http://cgi.ebay.com/ebaymotors/ws/eB...RK%3AMEWA%3AIT
If you live in or near MD, this 200 also looks good, but it may need some carb work:
http://cgi.ebay.com/ebaymotors/ws/eB...RK%3AMEWA%3AIT
This 200 also looks appealing:
http://cgi.ebay.com/ebaymotors/ws/eB...RK%3AMEWA%3AIT
Steve