I have the Yosh. Full TRS Carbon Fiber System on my 660 with a UNI filter and DynoJet Kit. I love this set up. There was a noticable gain and it sounds great. I would recomend it to anyone for sure. I can't comment on the Twist Throtle from my own experiance, but my friend put one on his Raptor for about a day and he hated it.

 

i guess lrd has a nice kit for the raptor

 

Twist throttles are ok...you just can't be an idiot & have one. All motorcycles have them..if they were so dangerous wouldn't motorcycles have thumb throttles? Iv'e heard all the excuses about where twist throttles can get you in trouble...in the whoops, tight corners, & steep hills. I guess some poeple have no control over their right wrist & arm....weird.

 

yeah, i was looking at the lrd duals.. they look pretty cool... plus i bet they sound pretty mean.