Rotorstock IIIâ€¦ we got our asses whipped reeeal good!! Malcolm Stanley, ex-police Norton rotary mechanic and experienced bike racer... set an amazing time of 11.7 without the aid of an ejector exhaust!!! Malcolm has modified the bike to rev higher than the standard 9000rpm, I think a figure of 11,750 was mentioned.
I asked Malcolm how he did it, this was his reply...
> Thats top secret, but its a factory built RC588 spec
> Sparkrite unit on mine! OK its a standard ign box that
> was modified by Paddy at the factory in 1989. He was a
> television engineer who used to rebuild and test all
> the Sparkrite ignition units and voltage regulators. I
> had 2 boxes modified, one for the race bike and one
> for the Earlystocks bike, but only the one for the
> race bike had the tacho take off wire and as I was not
> using the alternator, this was the only one I could
> One big problem though is the need to replace the
> rotor bearings if high rpm are used. (Brian Crighton
> says 300 racing miles). I was a bit complacent and put
> off changing mine, after all, it was running really
> well and there were no noises until a sudden thud and
> the engine locked after the bearing broke up. The L/H
> endplate, centre plate, rotor shaft, rotor and housing
> were all scrap! All parts which are hard to get hold
> of now. I think it is the cage of the bearing that is
> forced into the rotor and fails.
> Nearly twenty years on and the Sparkrite units can be
> modified if you can find someone to do it. Graham
> Wilshaw can probably supply one made to order or
> Norton Motors are advertising new systems and could
> probably supply to order,ie no retard and rev limiter
> set at what you want.
Oh!... sod that for a game, think i will stick to 9000rpm then. LOL.