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Not convinced it’s running right…
- schrader7032
- Posts: 9052
- Joined: Fri Oct 27, 2006 3:00 am
- Location: San Antonio, TX
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Re: Not convinced it’s running right…
'78 R100/7 '69 R69S '52 R25/2
Fast. Neat. Average. Friendly. Good. Good.
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- Joined: Mon Aug 22, 2022 8:56 am
- Location: Winston Salem, NC
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Re: Not convinced it’s running right…
- srankin
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Re: Not convinced it’s running right…
Everything inside the transmission that runs the speedometer is bullet proof. LOL, of course you could have a one and a million bike.
Seat the cables, try it, if not, put a new cable on, then if all else fails repair the speedometer.
FYI, I had a long argument with a fellow who ran his speedometer on a drill a long time ago, it worked fine until he rode the bike. in his case, the speedometer was fine, the cable was not. Remember when you have the cable off and hooked up to a drill, there is a chance you have taken one of the bends out of the path it follows and now the cable is not rubbing on the inside of the sheathing.
Yeah, I can't stand it when it rains and I need to check out a repair. I have that going on here today, I haven't ridden in two weeks due to a wiring problem on both of my bikes, now I have one sorted, it is raining. St.
- srankin
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Re: Not convinced it’s running right…
It is possible to have a properly calibrated speedometer for speed have a needle bounce plus or minus a few mph. I had been in a long email debate with two of the repair shops as to why it is from the factory the needle is steady and why after sending it in for repair and calibration it bounces plus or minus five mph. I never got a satisfactory answer. Experiments on a 85mph BMW speedometer I had in my tool box in my mind points to the hair spring on the needle being the problem. Too tight and speed is off when riding, too loose, the needle bounces.
The last guy to repair a speedometer for me claimed his bench test after repair showed a steady proper calibrated unit. I was going to send him a video of my needle after he did the repair bouncing at 60mph. I never got a camera mounted to record and found a new old stock speedometer at Bob's for sale. Rather than shipping a unit back and forth and messing about, I installed the nos unit when I rolled over another 100K and the odometer was all at zero. I have been happy since.
St.
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Re: Not convinced it’s running right…
Maybe playing with the cable made a difference… one can only hope something would be so easy!
- srankin
- Posts: 1081
- Joined: Fri Jul 14, 2017 8:45 pm
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Re: Not convinced it’s running right…
LOL, I sacrificed that BMW 85mph speedometer for answers. I never did get it to work right and further experimentation has left it a collection of parts in my tool box.
I did forget to mention aside from the gear drive for the odometer part, there is a worm gear in the speed part that spins on of the magnetized discs. It could be the lubrication in it is dry, I strongly advise not trying to take it apart your self.
They can be repaired. I wish I could be more help. St.
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- Joined: Mon Aug 22, 2022 8:56 am
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Re: Not convinced it’s running right…
Thanks.
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- Posts: 52
- Joined: Mon Aug 22, 2022 8:56 am
- Location: Winston Salem, NC
- Has thanked: 2 times
Re: Not convinced it’s running right…
- srankin
- Posts: 1081
- Joined: Fri Jul 14, 2017 8:45 pm
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Re: Not convinced it’s running right…
As for what years they were installed, well it would be the time of the country wide 55mph speed limit. My teflon memory has lost the dates.
They work the same as their bigger number brothers and I have no desire to have one on a bike I own, so, it made the sacrifice in the name of learning.
There are all kinds of GPS speedometers in the aftermarket, if you choose that path. Hopefully, you don't. St.
- schrader7032
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Re: Not convinced it’s running right…
Anton posted on ADV that 85 mph speedometers were US law from September 1979 to October 1982.
'78 R100/7 '69 R69S '52 R25/2
Fast. Neat. Average. Friendly. Good. Good.