hmmm have to disagree with that, tell that to all the stator buyers and leaking carbs riders, the boyesens make a huge difference to the rev3 along with the jetting and carb mod no matter what level of rider you are. Swapping the carb boot over makes the carb go in alot easier and removing the reed block spacer gives a little better low end power but its main plus is the carb goes in easily and the Float bowl extension helps fuel starvation when doing climbs. Fitting Boyesens are really worth doing, amazes me Beta don't stick them in as stock itmes, Dellorto carb on the rev is just pure **** material agree with the mag cover though, another fine example of Beta spending alot of time getting the bike right