own a couple and are my favorite surprised that i dont see anything here,like the c5bb,b offroad or c5 rody onroad are imo the sickest ,928,728,323 w7 etc

The RB engines are more popular in offroad than onroad.

I think that's all about to changed. The newer version of the RB 1005-RC is a real power horse. The 01005-RC engine features a newly developed 8-port sleeve (including our world famous M.E.S.), a new forged and redesigned piston, a newly designed and selected combustion chamber, a new hybrid main bearing, a new front bearing, all smartly presented in a stylish black crankcase with a newly designed cooling head.

I am not knocking RB engines. I raced offroad for a number of years. Ran X12's exclusively in gas truck and WS7's in my buggy.

That would be great!! We will see how it compares to the Plus 21-3 and the new 35 plus 21.

There have been a couple of threads on here about the RB engines, but i guess there werent too many posts....and this may have killed off the thread?
Cheers

RB Engine Thread