You might want to look at the Nelson engines. I know their 40 Fire/Fai is supposed to be one bad engine. Here's the specs:



Width: (to outside edges of mounting lugs): 2.00"

Height: (without glow-plug): 3.30"

Weight: AAC - 13.9 oz., ABC - 14.8 oz.

FAI Tuned pipe weight: 2.5 oz.

Effective RPM range: 26,000 to 30,000 RPM

Horsepower: 3.0+ HP

This thing sells for like $450. At that price I would hope it would dust all the competition. You can check it out at www.pspec.com
Or you can call Dave at Performance Specialties and he can tell you all about it. Their number is: 775-265-7523. They also have 2 more engines a little cheaper than this one. If you want to go as fast as possible and money is no object then this may be the engine to have.

Wade