ive had a few os engines. they werent what i considered to be a "performance" engine. engines like the super tigers...thunder tiger pro series.....and the asp/magnum engines are my engines of choice.

if you dont want a performance engine go os.......but if you want something that will tear the fork outta ya nightie....go for any of the above listed engines. i personally have a thing for the thunder tiger pro 46 engines as well as the 60-90 ASP/Magnum engines. and yes asp and magnum are made in the same factory....just a different front door


cheers
craig