speedo ratio

[littledave]

hi can anyone help i need to know what the ratio is for a speedo on a r65ls 1985 so i can get a small chrome aftermarket one for my cafe project

or any suggestions for said speedo would be nice  

[montmil]

Your first concern, Dave, will be to find an aftermarket speedometer unit that will marry up with the OEM drive cable. Luck to you there, amigo.

Plan B might involve checking out the options offered by TrailTech and Acewell. Both offer electronic gauges -some chrome- that contain other information provisions besides just your speed. Google 'em up.

I have a TrailTech Vapor on my R65 while my son is fitting an Acewell on his R65.

[Barry]

The speedo ratio printed on the face of Airhead speedos is the number of cable revolutions for 1 mile traveled and therefore the correct ratio depends on which final drive you have.  Assuming it's a 31/9 (3.44:1)) that would have a speedo ratio of 1276.

A 37/11 (3.36:1) would be 1244

[marcmax]

The Acewell digital speedo/tach has a BMW specific cable that can be bought to connect it. Replaces the original speedo cable right at the gearbox with a digital sender and a wire to the gauge.

http://www.dimecitycycles.com/vintage-cafe-racer-caferacer-bobber-brat-chopper-custom-motorcycle-cables-acewell-2853-digital-motorcycle-speedo-speedometer-tach-tachometer-bmw-ace-s11.html

The least expensive chrome gauge is the 2853. They go way up from there.

http://www.dimecitycycles.com/vintage-cafe-racer-caferacer-bobber-brat-chopper-custom-motorcycle-electronic-parts-chrome-acewell-2853-digital-motorcycle-speedo-speedometer-tach-tachometer-19-2853-ch.html