I see the “racer” is for sale again in this months Classic Motorcycle!
I was told this week that Willie Wilshire used to roll out a Jubilee occasionally that revved to 9500 rpm. Maybe this is it?
……..I'm just imagining what a stripped and lightened Navigator classic racer might be able to achieve Dan, given it's Roadholder forks, excellent brakes and modern racing tyres. With 12v total loss electrics to get rid of the alternator, electronic ignition, twin carbs, a blueprinted engine, some sensible gas flowing and less restrictive tuned exhaust , higher compression ratio, modern valve springs to reduce valve bounce, statically and dynamically balanced lightened bottom end, belt primary drive...….reliable 100 mph+ top end must be achievable! A bespoke alloy tank, lightweight period faring and bob tail seat it would look cracking too! It was always a teenage dream of mine......Nick
...Do like Patrick M and Uli H have shown pictures of - fit a Honda CB350 or Yamaha XS400 engine in and have a reliable, leak free faster bike!
Says he who has a Morini sport (which has been superbly reliable, leak free and surprisingly quick over the last 98000 miles)
A well built Norda or Yamton racer is a worthy project George if you have a spare Lightweight frame and no engine but a Naviracer is 100% Norton so unapproachable...….and with a little TLC reliable and leak free.....making it faster than it's contemporaries is the great challenge that classic racing is all about. Luckily CB350s and XS400s aren't contemporaries! Love the Morini sport but never owned one sadly.
A while ago I spoke to Les Emery about their efforts to create a jubilee racer, I can’t remember all the details but it involved head work (they even tried reversing the head to enable twin carbs to be fitted- but am not sure that was successful) it had vertex pistons and Kawasaki valve springs to stop the bounce, I think it revved to 12000, was clocked well over the ton, but still wasn’t fast enough to be competitive.
I thought about putting a Navigator on the Scrambles track as with lower gearing it might perform better, but it would be up against 350 triumphs and in some clubs bigger bikes. The engines aren’t that well known and I might be able to pass it off as a jubilee and race it in the upto 250 class ...... or would that be cheating ?!!