Over twenty Racing Seasons under about a dozen Riders!
The Family Racer started life as a normal Commando, bought as a derelict reimport from the States in the early 1990s. Around the time we started vintage racing for fun the idea was to enter the 750cc class on a Commando. Rudi Kolano built the engine. Gearbox was at first a standard 4-speeder, primary is triplex chain with a tooth more on the engine sprocket and an aluminium clutch basket left over from some project bike once bought and re-sold. So is the twin-disc setup that was taken off another bike many years ago- must have been a very early Hemmings product, as Mick Hemmings made the first left hand/caliper at front sliders. The factory used the "one in front, one at rear" setup with the same slider used on both sides. Clutch runs in ATF oil, using the standard fibre and steel clutch plates and the standard clutch spring.
Engine started out as an unmodified but rebuilt "Combat" type crankcase, very much butchered around the l.h. main bearing, more anon. Using high-compression GPM pistons, standard Andover Norton Commando valves, Hyde valve springs, lightened rockers and cam followers, a PW3 cam, and TLC for the ports, breathed on by two 932 Amal carbs, rubber-mounted on longer inlet tracts, the bike exhales through two hacked and re-welded Roadster pipes out of shortened Roadster silencers on the r.h. side, similar to the works production racers. This, together with a modified outer primary, possible through leaving the alternator out, gives more ground clearance for cornering.
Ignition is now a Pazon Surefire. A dry battery provides the current.