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600SS Tacho drive ratio

Submitted by ian_richtsteig on Tue, 24/03/2015
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Heavy Twins

Could some one out there please confirm the correct ratio for the tacho gear box on my 1961 600SS. The bike has a standard chronometric tacho (number 1309/00) and rotates clockwise. I have both a 1:1 and 1:2 ratio gearboxes and several tachos to select from. I think that the 1:1 is the correct ratio as the bike had a 1:2 ratio and revs seemed too low for the road speed.

thanks

Submitted by terence_rafter on Tue, 24/03/2015

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My 650SS needed a 1/1 REVERSING Tacho Drive. The camshaft rotates anti-clockwise and this has to be compensated for.

Submitted by ian_richtsteig on Wed, 25/03/2015

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Previously terence_rafter wrote:

My 650SS needed a 1/1 REVERSING Tacho Drive. The camshaft rotates anti-clockwise and this has to be compensated for.

Thanks, That's exactly what I have in the spares draw.

 


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