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SOHC.co.uk Forums => Other Bikes => Topic started by: steven400/4 on October 24, 2014, 11:01:19 PM

Title: clocks ratio
Post by: steven400/4 on October 24, 2014, 11:01:19 PM

does anyone know the speedo and rev counter ratio,s for a honda cg125 or how to work it out  :'( :'( :'( :'(

Title: Re: clocks ratio
Post by: Lobo on October 25, 2014, 01:33:24 PM

Hi Steven,

Until a Tec guru comes up with the figures can I simply suggest you get out on a straight piece of road with a GPS taped to the tank. In each gear hold a steady speed & note the two readings... you'll now have said ratios.

Your speed will be (likely) more accurate than the original speedo gave, and best, independent of tyre size.

Simon

Title: Re: clocks ratio
Post by: Trigger on October 25, 2014, 05:32:14 PM

Quote from: steven400/4 on October 24, 2014, 11:01:19 PM

does anyone know the speedo and rev counter ratio,s for a honda cg125 or how to work it out  :'( :'( :'( :'(

Sometimes it is printed on the back of the clock.

Title: Re: clocks ratio
Post by: steven400/4 on October 25, 2014, 07:01:44 PM

thanks gents i,m building a cafe racer for my lad most of the speedos i have looked at say 2.1 ratio but the taco,s say 1.4 or 1.7 i no taco dont matter that much but would be good to get the speedo right  8)