Really? OK, I stand corrected. Everything I have ever read suggested that the RB26 and RB25 were the most responsive to cam gears, (a friend played with custom inlet cam gear on a NEO and got nothing from it...but an adjustable cam gear worked well on his exhaust side)...and RB20s respond well, but not as well as its bigger cc cousins.
I have read that cam gears were a waste of time and money if you were running Poncams. But...can't say I have paid too much attention to it the last 5 years...it used to be a golden rule