As you know, very few people have anything bad to say about OS. However, the one negative comment I HAVE heard is that there are problems with the pumped versions of their Surpass line.

Next up - if you want to squeeze every ounce of power out of your engines, stick to 2-strokes. 4-strokes like to run at a much lower RPM and trying to squeeze "The Most" out of them will often end up with you buying a new engine.

If you're really that power-crazy, get the YS.