There are a number of things that make this 2017 Beta Evo 300 a Super Smooth. Among the difficult to reverse changes are a combustion chamber modification to reduce the power pulses and a heavier primary drive gear to slow things down—consider those to be permanent.
Next up is an exhaust system tuned for more torque—few riders really need top end power on a 300. That’s reversible, but not inexpensively. A heavier flywheel slows things down further. That is not a difficult change, but will cost a few dollars if you want to go to a lighter flywheel for snappier throttle response.
Finally, the countershaft sprocket is smaller, and the throttle tube slows down the opening of the 28mm Keihin carb. The throttle tube can be swapped out in about a minute for just a few bucks, while changing the countershaft sprocket takes several minutes and a bit more money.
A final feature, one that is also on the standard Evo 300, is a switch to change the ignition mapping—Rain or Dry. Pushing the button, of course, is free.
As an experienced trials rider, I have put quite a bit of time on the 2017 Beta Evo 300 SS, as well as competed on it in a very challenging observed trials event. After all this time on the bike, I’m not sure that I would change a thing. It’s incredibly capable as a trials bike, and it is not anywhere near as slow to respond as all those changes might suggest.
