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Author Topic: rev counter  (Read 658 times)

manxr65

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rev counter
« on: June 30, 2010, 05:36:41 AM »
as i have made the r65 into a cafe racer  and got rid of most of the wiring the rev counter is off and not working , is there a way of checking the rpm without the rev counter clock. ie at the coil or plug
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Offline montmil

  • Mt. Olympus Resident
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  • Posts: 8371
Re: rev counter
« Reply #1 on: June 30, 2010, 06:21:03 AM »
I was going to suggest shopping at an auto supply but now wonder if the usual easy hookup offerings would work on the 2-cylinder BMW? Good question. Hope someone will help out with a real answer.

Monte
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Monte Miller
Denton, TEXAS
1978 BMW R100S
1981 BMW R65
1983 BMW R65
1995 Triumph Trophy
1986 VW Cabriolet

Offline Barry

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  • Posts: 5145
Re: rev counter
« Reply #2 on: June 30, 2010, 10:58:20 AM »
The original rev counter works by counting pulses from the primary side of the ignition coil. I guess any other electronic tachometer could be made to work off the same connection. I f you mean just a spot one off measurement for maintenance purposes some automotive multimeters can indicate RPM again from the same coil connection.
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Barry Cheshire, England 79 R45
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