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By Andy Downes -
27 August 2009 11:33
This is one of the entries for MCN's 2009 Britain's Got Biking Talent.
Owner Tony Haywood has just brought his Norton NRS588 Rotary race bike replica into the MCN offices to be photographed, and we twisted his arm to start it in the car park afterwards. It's one of the loudest, angriest, weirdest, most incredible sounds you can imagine.
MCN Chief Road Tester Michael Neeves said: “Riding around MCN's car park, I feared it would spit me off and crash into all the parked cars, but it's actually friendlier than it sounds.
“I'd love to ride it on the track, although it would be far too loud to allowed on at most circuits. I'm still buzzing now!”
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All Norton rotary bikes are accepted by the Dvla at 588cc, for me in the uk this should be enough, There was an article in Classic Bike or Mechanics this or last year where the 0W01 guru admitted over size 4 cylinder 4 stoke engines were being used against the Norton’s, witch for me kills the argument Norton were cheating. (I am biased)
I am restoring (or trying to) Nrs-1-10 engine back to its former glory which was an actual factory bike engine i can confirm 588cc was maintained with the main differences between the standard F1 engine and Nrs race engine are, inlet ports opened up to 38mm, steel clutch drum modified to belt drive, OW01 gearbox, timing/ignition one off, carburetion up 2mm to 36mm flat slide, ejector exhaust, every thing ells standard F1 engine or metal trimmed off.
Hc 10 to 1 rotors appeared on the Rotons the Nrs race engine ran standard F1 rotors and eccentric shaft, the fuel was unleaded 95
Tony’s bike is a wonderful example and I can testify how hard it is to trace parts (Tony, if you are interested I am talking to the company who made the original belt drives for the Nrs, no starter motor though, bump off only)
It’s a pity Harris cant make the correct Nrs frame any more, although there is an original Nrs/Harris frame roomerd to be in Australia the proto type frame, it would go nice with my early engine (Nrs 1991 10th made c/w tt91 gearbox)hint hint if any one knows the owner,
Ps all the above also applies to Hislops tt wining Nrs which he leased from Norton, yes he paid Norton for the TT wining ride, don’t know in Norton refunded it though.
18 December 2010 00:48
Two-strokes and Wankels have a big place in my heart, alongside boxers, turbos, and all multiples of 3. Who wouldn't want to see, hear and smell all formats competing with today's ubiquitous four-stroke piston engines? To keep it fair there should be no displacement limits (or controversial multipliers), just limit the amount of fuel. The big question is, who would pay for it? Do motorsports rules really determine the course of progress, or do considerations like efficiency, emissions, manufacturability, cost, and even longevity, drive the manufacturers and ultimately determine the rules?
I thought the main reason for Honda's oval piston was to increase total valve area without increasing the number of pistons (and so win by a handsome margin while staying entirely within the rules). But no-one else was ready or wanted to be thrashed, so the rules were changed and sadly another fab motor bit the bullet.
02 September 2009 13:45
makes some very valid points, however would we now be seeing four strokes enjoying such dominance in moto gp, motocross, supermoto etc. if the four stroke hadn't been given a capacity advantage over two strokes of 2 to 1? At one time they both raced on an equal footing capacity wise, which is why Honda put such large funds into the oval piston bikes, in order to circumvent the regulations. It would be better if all engine types could be raced on equal footing so best man wins etc. Lets have rotaries and two strokes back with four strokes, whether the four strokes got poppet or rotary or sleeve valves or whatever!
01 September 2009 19:36
We're going to make a video lads. The plot? Well there is no plot. You just pull the clutch in and keep twisting the throttle.
29 August 2009 18:12
well pot bbs could not agree with you more no wonder the bsa oops norton won a lot when it was racing
29 August 2009 00:20
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