Speedometer Ratios and Final Drives

Begonnen von Kurt in S.A., 12 Januar 2019, 01:10:23

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Kurt in S.A.

A question regarding the proper matching of the little "W" number on the speedometer face to a final drive ratio.  Not just for singles but is there a list somewhere on the forum that provides the suitable pairings that left the factory?

Thanks...Kurt
Kurt in S.A.

Kurt in S.A.

Kurt in S.A.

Taz

Hello Kurt.

You may want to have a look at http://monos.r25-bike.de/#tacho_EN ,resp. http://monos.r25-bike.de/#hagetriebe_EN ..and please keep in mind that the values for W are valid for km/h speedos, mph would need to be calculated from there....

Kind regards, Taz
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Kurt in S.A.

I have the BMW VMCA article but was looking for something more from BMW.  Someone has mentioned using a speedometer with 0.715 but I haven't seen that listed on any publications.

Kurt
Kurt in S.A.

bwprice100

Once you know the ratio then get Guenter to make one up for you. ulrikewiha@web.de

That's what I did for mine as the mph speedo for my R26 is unobtainable.

https://photos.app.goo.gl/w84WZw3kWZoUNYVq1

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Kurt in S.A.

I was hoping to find a relatively correct listing of speedometer and final drive ratios listed for future reference.

Kurt
Kurt in S.A.

bwprice100

There is only one W ratio that will match the final drive and MPH spectrometers are rare for the singles and it was far more cost effective to get a spare KPH speedo altered.

I hope this helps
Brian

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Kurt in S.A.

Thanks, Brian.  In full disclosure, someone said they had a 0.715 KPH speedo and he wants to use it for an R69S.  I have yet to find this ratio listed.  That was why I was looking for more official documentation.  I'm not sure if this person wants to or needs to send the speedo off for overhaul.

Kurt
Kurt in S.A.

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