Wonder if you can help with advice ? I have a 1962 650 SS Norton and from the info I have it should have a speedo SC.3303/46 with drive BG.5330/257 ( 2-1 ratio ) and revcounter RC.1309/00 with drive BG.1508/05. What I have is speedo 1550 SC.3303/01 with drive BG.5330/847 ( 19-10 ratio ), 19" rear wheel, and revcounter RC.83 with drive BG.1508/05. From what I have found the revcounter should be fine, but not so sure on the speedo. Any thoughts ?
Cheers,
John.
Chronometric speedometers…
- Log in to post comments
Previously paul_standeven…
Previously paul_standeven wrote:
Chronometric speedometers are all essentially the same, whether 80mph, 120 or 150. (Even a D-shaped Bantam one has the same chronometric mechanism). They just rang the changes with the face, bezel and drive ratios. Take one to a specialist, and he will build it with a suitable face and correct gearing for your machine.
Tachos have a heavier-duty chronometric mechanism, but you can make a tacho out of a speedo. It just won't be as tough as a correct one. I once had a specialist make me a tacho for a BSA A10 with drive off the oil pump. It's a 3:1 drive of the opposite to normal direction. No problem....
Paul
Hello Now for 650ss is the same set up as the earlier Norton Manxman 650 witch was fitted with smiths bg1508/05 and tachometer rc1301/00 2:1 ratio And I do Have A bsa 3:1 reversing if any one want to do a swap for a 2:1 tachometer your anna j
- Log in to post comments
Chronometric speedometers are all essentially the same, whether 80mph, 120 or 150. (Even a D-shaped Bantam one has the same chronometric mechanism). They just rang the changes with the face, bezel and drive ratios. Take one to a specialist, and he will build it with a suitable face and correct gearing for your machine.
Tachos have a heavier-duty chronometric mechanism, but you can make a tacho out of a speedo. It just won't be as tough as a correct one. I once had a specialist make me a tacho for a BSA A10 with drive off the oil pump. It's a 3:1 drive of the opposite to normal direction. No problem....
Paul