Charkmandler
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- Joined
- Nov 6, 2023
- Messages
- 34
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Restoring my Model 50 for racing is just about finished, just an exhaust to make to comply with current regs in the UK. My question is about the clutch.
In the early 90's I remember taking the clutch off and trimming the chain wheel, putting a band round the outside and also drilling the clutch centre in between the contact point of the plates. On fitting the clutch it would only take three friction plates (not counting the inserts in the chainwheel) not the 4 that were used when racing. Measuring the centre the width is approx 30mm where as an old very worn centre I have is 35mm and would take 4 friction plates. There is no way I used the worn out centre and I can't find the original used for racing.
1) would 3 friction plates be enough for the power of a model 50 that late 80's was turning out similar power to 7R's and 350 Manx's?
2) I can buy a wider centre for a reasonable price from RGM (https://www.rgmnorton.co.uk/buy/dominator-clutch-hub-centre_888.htm) but they say its for the later clutch that had a plain chainwheel with the friction material in the back plate. Looking at the picture I can't see why it wouldn't work? Any suggestions please?
I will be building a 500 at some point and will go to a belt drive but at the moment the money is not there to buy one so I just need the cheapest option that will work. The worn out one is way past filing the grooves out.
Thanks for any suggestions.
In the early 90's I remember taking the clutch off and trimming the chain wheel, putting a band round the outside and also drilling the clutch centre in between the contact point of the plates. On fitting the clutch it would only take three friction plates (not counting the inserts in the chainwheel) not the 4 that were used when racing. Measuring the centre the width is approx 30mm where as an old very worn centre I have is 35mm and would take 4 friction plates. There is no way I used the worn out centre and I can't find the original used for racing.
1) would 3 friction plates be enough for the power of a model 50 that late 80's was turning out similar power to 7R's and 350 Manx's?
2) I can buy a wider centre for a reasonable price from RGM (https://www.rgmnorton.co.uk/buy/dominator-clutch-hub-centre_888.htm) but they say its for the later clutch that had a plain chainwheel with the friction material in the back plate. Looking at the picture I can't see why it wouldn't work? Any suggestions please?
I will be building a 500 at some point and will go to a belt drive but at the moment the money is not there to buy one so I just need the cheapest option that will work. The worn out one is way past filing the grooves out.
Thanks for any suggestions.