Have to say if you've bought an RB and want to cruise on it you've bought the wrong kit and should have maybe gone for a TS1. If you go with 5.2 gearing and the fat mamba then cruising is not an option. This is because at 65-70 you will be in the middle of a rather large power band.
I think its wrong to say either the fat mamba or the RB is revy. The RB makes lots of power over a a good 3000rpm its just that this is between say 6 and 9000rpm. Power starts to rise rather violently from 5000rpm anything below is flat. My view is that any pipe that doesn't allow this is simply retricting power and not allowing the kit to achieve its full potential. If your going to do that why buy an RB over a TS1 which is a better made kit and more flexable regards port timings and exhaust choice?
Not had the ADS pipe at ours yet for the RB but certainly the AF touring pipe only restricts top end power with no mid range benifit. No experience of the JL1 but a touring pipe on an RB-why?
The Fat Mamba produces excellent power but one of our customers did have issues with the end can.
My experience with RBs is that 5.2 gearing is too low and they should pull 4.8 easily. I have ridden and dynoed an RB with 5.2 gearing and an NKrace. It was lots of fun but I couldn't help feel it wouldn't be that way for long and it wasn't. Constant problems with ancillary parts destroying themselves.
Crank wise I think the 58mm AF crank for the RB is not as good as others on the market or even using 58mm webs with jap rods ie not an off the shelf crank.. We've used MEC webs with RG500 big end and RD350 rod with no problems over 2 rally seasons.
If your going to use the RB to its full potential I think a 6 plate is essential. The camlam 6 plate works well but plates need changing once a year due to the ears being eaten into by the crownwheel. The friction material stood up well after lots of abuse though. The MB clutch is excellent as well and may well stand up better by using thicker plates.
Variable ignition timing allows these motors to be ridden more easily round town so if your using a static system an augusto or Chislespeeds version which is adjustable is worthwhile. Camlams variatronic with welded flywheel has worked well on engines we've built.
Basically scrimp on nothing if you do you'll end up by the side of the road. At least you'll be warmer than we are here though
