classic motorcycle forum

Motorcycle Discussions => British Bikes => Topic started by: thunderbird on June 23, 2008, 08:59:48 PM

Title: smiths chronometric rev counter
Post by: thunderbird on June 23, 2008, 08:59:48 PM

Hi have a smiths chronometric rev counter model number rc 83 which i was going to fit to my 57 thunderbird but it appears the drive rotation is wrong ie anticlockwise should be clockwise ?does anyone no what model number is correct for pre unit triumphs,or is it possible to have this unit modified to run in the right direction. Thanks Steve

Title: Re: smiths chronometric rev counter
Post by: L.A.B. on June 24, 2008, 02:23:38 AM

An alternative could be to find an opposite rotation drive gearbox?
As there were  "reversing" and "non-reversing" drive boxes.
Different drive box ratios were also available, such as : 1:1, 2:1 and 4:1.    

Title: Re: smiths chronometric rev counter
Post by: thunderbird on June 24, 2008, 03:47:40 PM

Thanks LAB. i had not thought of that, the timing cover i have is a standard cover with the gearbox added to it so it would be easy to change, do you know of a supplier of the gearbox units. Regards Steve

Title: Re: smiths chronometric rev counter
Post by: L.A.B. on June 24, 2008, 04:40:32 PM

I must admit I don't know of anybody who sells the drive boxes, or even if there are any new ones to be had at all?
It may be a case of having to contact people who sell used Triumph parts, or hunting for one at autojumbles?

Title: Re: smiths chronometric rev counter
Post by: thunderbird on June 24, 2008, 08:53:11 PM

Thanks again LAB. i will ring around i am sure this will be a better option than trying to replace the rev counter or have it modified. Regards Steve

Title: Re: smiths chronometric rev counter
Post by: riflegreen on June 25, 2008, 02:10:35 AM

try these peole , got a Goldstar one from them  www.speedograph-richfield.com , look a the bottom of the special offers list .

Chris

Title: Re: smiths chronometric rev counter
Post by: thunderbird on June 25, 2008, 11:22:49 PM

Thanks chris, checked there site out looks promising.Regards Steve