Not sure what specs your cams are but I am running Yoshimura Stage 1 cams (in ported heads) and a full Akrapovic (race) exhaust and the billet runners work very well across the board. What they do, essentialy, is give you a healthy boost in the mids without hurting top-end. Of course if your goal is strictly top-end, then you would most certainly be better served by shorter units (although, IMO, realistically you would be better served by many other bikes compared to the VTR if high revs are your thing; not trying to be a smartass when I say this, just stating the obvious.... )benny hedges wrote:thing is m8 with the cams im using and the light flywheel, the bike wants to live between 7k & the limiter (approx 10.5k) so it without a doubt performs (and feels) much better on the short ones.mik_str wrote: Ben, you need to get in touch with Dr Honda on the Superhawk forum and order a set of long billet stacks (exact copies of ones developed by HPower in Australia, who designed them on a flow bench). Trust me, you will not be disappointed!
ive tried the long pair together a few times, as well as the original one of each set up and it just doesnt compare.
the mori ones ive seen though are really short - much shorter than oem so there must be something in it - for a bike that revs high the shorter ones work better (imo)
for folk who want to bimble around in the mid rpm range then yes, the longer ones work better and you feel the advantage of the mid range torque with them, but personally i dont see the point in riding down there when the bike is making 100+ bhp higher up the rpm = much more exciting to ride than pootling around making 30-50hp
cheers
