When I got my first blaster it came with a twister... It was horrible to work with, evertime I turned I.was hitting the powerband like mad, and when jumping or wheelieing it was horrible pulling on the bars.just opens up the throttle, and as said.above,.really bad if you get into a.sticky situation, anyway that's my experience with them, some people find them great, I.think their dangerous maybe because I was brought up on thumb throttles? I.don't know...