Engine Sprocket for my N15CS

I'm running a 19 tooth gearbox sprocket on my N15CS and I noticed that the selection for engine sprockets are 17T to 22T can anyone advise on which one would suite (road use only).
Cheers,
Monaro

I am running a 21 crank sprocket with a 20 gearbox on my 650SS works good, I road a G15CSR with a 22 crank and found the gear spacings to much, previously tried 16/19 and 21/19 i.e 21 crank 19 gearbox, sorry has been raining here so haven't been out on the bikes so can't tell you exactly what revs but its happy. The roy bacon book Norton Twin Restoration gives a good breakdown.
Al

Thanks Possm, I found a spec. on the Norton Owners (UK) that gave spec on sprockets. I think that I will go with;
22T engine sprocket---19T g'box sprocket =115 mph @ 6600rpm on 18'' x 4.00 tyres.
Regards,
Monaro.

Re: Center and side stand N15CS

Can someone advise me where the return springs for the center and side stand are located.
Cheers,
Monaro

Monaro, the end of the spring goes in one of two small holes on the underside of the right lower frame rail. Depending on which hole you choose, with one the stand is supposed to spring up on it's own when the bike is lifted off it, or else the other is supposed to keep the stand deployed until you physically move it back.

Re: Center and side stand N15CS

Thanks Dave, I have been away and just returned ,still a bit puzzled. If we take it that the center stand is like a large 'H' and the spring sits on the center bar with 1 end curling around the legs (right hand side from back of bike) are you saying that the other end is attached to a hole in the frame?
Cheers,
Monaro.

Monaro, I was referring to the side stand only. The end of the spring goes in one of two holes in the lower right hand frame rail. They are small and discrete, you may have to lie on your back under the bike to see them.

Regarding the center stand spring. I don't have a center stand on mine yet, but all the photos I have seen show a barrel shaped spring that sits on the mounting bolt that goes all the way through the stand and the frame side rails, there are two tangs sticking out, I assume one captures the stand on one leg and the other somewhere on the frame, but under tension.

I believe it would be very difficult with a standard Norton gearbox, to get the situation where it is suitable for both suburban and freeway riding without changing the overall gearing. As far as a gearbox goes it is always a compromise situation. If you are building a bike for maximum performance the main stumbling block is always the gearbox.