I've read the posting for the Intake Flapper Valve on the 100RR. Is this the same for the 600RR? If you get the result from plugging the vacuum line, why would you go through the trouble of removing everything? I see chainstretcher did this on his 1000RR, or at least he was posting in the 1000RR mods section. Do you still think it's worth doing? Any tips? Here's the thread I read https://cbrforum.com/m_19255/mpage_1...p/tm.htm#21453

 

i contacted a reliable source about the flapper mod. for the 600. his reply was most mid size bikes do not have flappers. no need i quess. i could be wrong but i also did not see it on my girl.