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Lining the engine sprocket ip with the clutcu can be a problem. The Norton cranks all have a 5 degree taper under the engine sprocket. I think the speedway Jawa sprocket carrier probably fits, however I had mine made by a smart engineering shop. I use single row primary chain snd the sprocket floats. To change the overall gearing, I simply pop the circlip and adjust the chain.I have several Norton engine sprockets - they must come from several different models, because the position of the chain-run is different on every one of them. For a road bike you might be able to find one which would solve the prinary chain line problem.The Jawa speedway sprocket carrier comes with a puller, but you would have to check the internal taper. I suspect Jawa are pretty snart - the taper in their carrier probably fits 5 dergees taper.Andy Smith in the UK sells Jawa bits. I think I bought four emgine sprockets from him for about 20 bucks,The TTI box came with four final drive sprockets. To change gearing, it is easier to change the engine sprocket. The final drive sprocket is tightened at 90 ft lbs.
Lining the engine sprocket ip with the clutcu can be a problem. The Norton cranks all have a 5 degree taper under the engine sprocket. I think the speedway Jawa sprocket carrier probably fits, however I had mine made by a smart engineering shop. I use single row primary chain snd the sprocket floats. To change the overall gearing, I simply pop the circlip and adjust the chain.
I have several Norton engine sprockets - they must come from several different models, because the position of the chain-run is different on every one of them. For a road bike you might be able to find one which would solve the prinary chain line problem.
The Jawa speedway sprocket carrier comes with a puller, but you would have to check the internal taper. I suspect Jawa are pretty snart - the taper in their carrier probably fits 5 dergees taper.
Andy Smith in the UK sells Jawa bits. I think I bought four emgine sprockets from him for about 20 bucks,
The TTI box came with four final drive sprockets. To change gearing, it is easier to change the engine sprocket. The final drive sprocket is tightened at 90 ft lbs.
