i agree, it just cleans up the carbs even more. equalizes them. it will cost 35-40 bucks from SLP, i took the carb boots off and just used a drill as to not get any rubber in the cylenders. I think if you have the kienin (spelling?) carbs it is much worth it. Not sure on the mikuni though, so far my 800 runs pretty darn good. Not really loading up on the low endJace said:I just installed one on mine, and it made the throttle response much crisper. It smoothes out the low end and midrange. It was very easy to install. I used a length of 1/2" copper pipe as a hole saw. I filed the inner diameter to a sharp edge, and the outer diameter of the pipe is actually near 5/8". Makes a perfect hole for each intake boot.
I noticed a big difference. Even the idle was higher, had to turn it down. It also helps to synchronize the carbs. Maybe that's why the engine seems to run a little smoother.(even though the carbs were mechanically synched the same)