Rev counter/speedo options

[camel]

Ive got a little headstock mounted digi rev counter but its playing up and too be honest its a little small to read thesedays
i use it to calculate speed against the gearbox ratio so its really for a speedometer
is anybody using a rev counter or digi speedo small enough to attatch to a hydraulic master cylinder or thereabouts
any links or photos would be appeciated
thanks in advance

[carlos fandango]

Koso make quite a good range have a look at www.digitalspeedos.co.uk