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Author Topic: tachometer failure  (Read 1561 times)

Offline Bill Conquest

  • Lives in Foothills of Mt. Olympus
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tachometer failure
« on: October 14, 2015, 12:42:52 AM »
Hi everyone, My tach on my 79 R65 recently quit working.. are there any first things to check before sending it off..it was rebuilt by Palo Alto about 4 years ago.
Thanks, Bill
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79 r65/75 r60/76r75/76r100

Online Barry

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Re: tachometer failure
« Reply #1 on: October 14, 2015, 03:37:40 AM »
The first thing I'd check is the impulse connection from the coil to the tach. There should be a black wire from terminal 1 on the front ignition coil to pin 5 on the tachometer connector. For the tacho to work you must also have +12v on pin 6 and an earth on pin 8.
« Last Edit: October 14, 2015, 03:41:04 AM by bhodgson »
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Barry Cheshire, England 79 R45

Offline Bill Conquest

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Re: tachometer failure
« Reply #2 on: October 15, 2015, 12:59:23 AM »
That's great info, Barry..i'll check those and if i'm lucky it'll be one of them..mahalo!!
Bill
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79 r65/75 r60/76r75/76r100

Offline Bill Conquest

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Re: tachometer failure
« Reply #3 on: October 17, 2015, 10:58:38 PM »
well, I checked all the connections and wires and they are good...I guess it's off to the repair shop..
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79 r65/75 r60/76r75/76r100

Offline Tony Smith

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Re: tachometer failure
« Reply #4 on: October 18, 2015, 01:22:48 AM »
Quote
well, I checked all the connections and wires and they are good...I guess it's off to the repair shop..

I have managed to restore one to life, a long time ago by replacing the capacitors on the power supply side. i can't be more helpful that that I'm afraid as it was so long ago. Also i am aware that there are at least two 'series' of R65 Tacho and one has some discrete components that can be carefully removed and replaced at home, and the second uses surface mount components - I lack the equipment, the eyesight or the hand-eye coordination to attempt them.
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1978 R100RS| 1981 R100RS (JPS) | 1984 R65 | 1992 KLE500 | 2002 R1150GSA |

Offline Bill Conquest

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Re: tachometer failure
« Reply #5 on: October 20, 2015, 12:44:24 AM »
Thanks Tony...I've been tempted to take a crack at fixing them but always change my mind when I look inside!  I would probably do more damage than good.. any thoughts about the best place to send it to?
Thanks, Bill
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79 r65/75 r60/76r75/76r100

Offline Tony Smith

  • Mt. Olympus Resident
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Re: tachometer failure
« Reply #6 on: October 20, 2015, 04:31:55 AM »
Quote
Thanks Tony...I've been tempted to take a crack at fixing them but always change my mind when I look inside!  I would probably do more damage than good.. any thoughts about the best place to send it to?
Thanks, Bill


Sorry, no.
Fleabay is your friend, as recently as yesterday there was one for sale.
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1978 R100RS| 1981 R100RS (JPS) | 1984 R65 | 1992 KLE500 | 2002 R1150GSA |

Offline marcmax

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Re: tachometer failure
« Reply #7 on: October 20, 2015, 09:43:04 AM »
Bill. Send me a PM. I have two tachs sitting in a box in the garage. Both are off of an LS, one is 1982 the other is 1984. I have switched to digital gauges and they have been sitting there for a couple of years.
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Keep your bike in good repair: motorcycle boots are not comfortable for walking.

1982 R65ls    1984 R65ls

Offline Bill Conquest

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Re: tachometer failure
« Reply #8 on: October 22, 2015, 01:08:26 AM »
Thanks everyone for the feedback!
Bill
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