Tippie
Hero member
- Location
- Dr?bak, Norway
Or just put Laverda badges onto the Triumph like lots of factories do with cars and bikes and badges now, and people can live the dream.
Zane 750S Crankshafts
- Thread starter ghwallice
- Start date
Andy J
Hero member
- Location
- Isle of Man
Or put a Laverda badge on a Suzuki SV650 and call it a Laverda Lynx. 
piranha-bro2
Hero member
- Location
- Melbourne
The only reason i think about fitting a different motor to a Zane is that the rolling chassis on them is incredible and they are/were incredibly cheap. Maybe a Yamaha triple engine would fit too? There are a couple of R7 660s wrecking in Gumtree Oz after one quick search - out of interest only.
There was that very quick R7 at the Island meeting - that's the motor I'd use. Definitely producing power beyond the LAMS limit.
There was that very quick R7 at the Island meeting - that's the motor I'd use. Definitely producing power beyond the LAMS limit.
CLEMTOG
Hero member
not a Trident Lothar, but a Hinckly water cooled triple, not going to be done by me! would be horendously ugly,
the problem with the Zane chassis and modern (ish) engines seems to me to be the "stacked" gearbox mainly and then the lack of width between the spars as well.
Lothar let's just say that the Rotax that I have does seem to have enough power and low down torque to make the job worthwhile and leave it at that. I am very often wrong anyway, because usually i write without checking written referances.
CLEM
PS I would sell the "as is" kit of Rotax 800cc twin, 668 rolling chassis, tank, bodywork wheels and brakes, for £3000, any takers? I am getting too old.
the problem with the Zane chassis and modern (ish) engines seems to me to be the "stacked" gearbox mainly and then the lack of width between the spars as well.
Lothar let's just say that the Rotax that I have does seem to have enough power and low down torque to make the job worthwhile and leave it at that. I am very often wrong anyway, because usually i write without checking written referances.
CLEM
PS I would sell the "as is" kit of Rotax 800cc twin, 668 rolling chassis, tank, bodywork wheels and brakes, for £3000, any takers? I am getting too old.
Andy J
Hero member
- Location
- Isle of Man
I believe the original engine was 44-47bhp in the Alpino and about 10hp higher for the F500/Monty, so around half that of a well sorted 750S Formula engine. Not sure about the interference fit change.
Andy J
Hero member
- Location
- Isle of Man
If you more than halve the price you might get some takers, especially when a Jota is being offered at only 3 grand...
There was no change in interferance fit. There are limits...
Good Formulas could push out 65hp, the Brettoni 570cc engines used in the german BotT series had 76 and 78hp respectively. While rated at 44 DIN-hp, even healthy 500s struggled to reach that, most of them threw in the towel at around 38-40 on the Moto Witt dyno. Wifeys' 500 eventually produced a very lively 49 while remaining street legal and TÜV conform.
Could have gone further, but road manners would have suffered.
piet
Good Formulas could push out 65hp, the Brettoni 570cc engines used in the german BotT series had 76 and 78hp respectively. While rated at 44 DIN-hp, even healthy 500s struggled to reach that, most of them threw in the towel at around 38-40 on the Moto Witt dyno. Wifeys' 500 eventually produced a very lively 49 while remaining street legal and TÜV conform.
Could have gone further, but road manners would have suffered.piet
piranha-bro2
Hero member
- Location
- Melbourne
What sort of torque numbers and power spread did they offer once those higher HP figures were being reached?There was no change in interferance fit. There are limits...
Good Formulas could push out 65hp, the Brettoni 570cc engines used in the german BotT series had 76 and 78hp respectively. While rated at 44 DIN-hp, even healthy 500s struggled to reach that, most of them threw in the towel at around 38-40 on the Moto Witt dyno. Wifeys' 500 eventually produced a very lively 49 while remaining street legal and TÜV conform.
piet
No Idea of torque numbers Quentin, too long ago.
The Brettoni engines were red-lined at 10500, but my mate Georg regulary took it to 12 grand, he once stated the valve train clatter would disappear and the engine would purr nicely at those revs. He wasn't very sympathetic to his bikes, trashed engines lined his path... Surprisingly, that bike (one of the 5 famed Harris/Moto Witt chassis) survived and eventually found its way to Tim Parker in the US.
Georg wasn't the most competitive rider, he loaned the bike to Micheal Stöcker once for a meeting at Hockenheim. The competition, mostly made up of over-sized Guzzi and Beemers, were thinking of protesting when he took third place. I think the regulations at the time allowed a max of 1000cc, but all the front runners were illegal and nobody dared protest anybody else. But their ego was seriously bruised when they learnt they'd been walloped by an engine half their capacity!
Wifeys' 500 is fitted with modified Formula pistons, along with Formula/OR600 valves, but retains stock cams and carbs. Makes for a very tractable engine with excellent road manners and exceptional acceleration when needed. On a whole, not much faster than a stock bike, but it certainly does get there quicker.
piet
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piranha-bro2
Hero member
- Location
- Melbourne
The right kind of power for a road bike. Wringing a peaky bike's neck is par for the course in racing, but a pain in the arse on the road.Wifeys' 500 is fitted with modified Formula pistons, along with Formula/OR600 valves, but retains stock cams and carbs. Makes for a very tractable engine with excellent road manners and exceptional acceleration when needed. On a whole, not much faster than a stock bike, but it certainly does get there quicker.
piet