cheap reproduction instruments

Status
Not open for further replies.
Joined
Oct 19, 2005
Messages
1,630
Country flag
Has anybody had any experience with the cheap and cheerful speedos and tachos that are widely available for about $100 a pair? I am thinking of trying them for a non-standard project that I will be working on soon and wonder whether they work and last longer than 5 minutes.
 
dave M said:
Has anybody had any experience with the cheap and cheerful speedos and tachos that are widely available for about $100 a pair? I am thinking of trying them for a non-standard project that I will be working on soon and wonder whether they work and last longer than 5 minutes.

yes- they are OK - i've used them on norton and triump based bikes
they maybe better than a original smiths for the money though they of course do not really look like the originals -just make sure you get the right ratio for your application
 
Out of curiosity, is there a reference source/page for original "stock" Commando speedometer drive ratios, (and do those ratios vary in the 70-75 model year time frame?
 
MEHAVEY said:
Out of curiosity, is there a reference source/page for original "stock" Commando speedometer drive ratios,

There's only one drive box ratio 1.25:1 (or 15/12) although the MkIII drive box is a different unit, the ratio is the same.

Speedos were either 1000 turns per mile, or 600 turns per kilometre.

Revcounters were all 4:1 ratio.
 
Status
Not open for further replies.
Back
Top