speedometer is slow by 10 mph


Information and questions on GL1000 Goldwings (1975-1979)
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blindmonkey
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Joined: Tue Oct 26, 2010 4:44 pm
Location: Battle Creek Mi
Motorcycle: 1978 Honda Goldwing

speedometer is slow by 10 mph

Postby blindmonkey » Fri Apr 01, 2011 6:14 pm



I need help. I just took my 78 GL 1000 out for a ride today and my gps is showing that i am going 10 over the speed limit and I have been noticed that I was going kinda fast in residential areas.



saltydog
Posts: 33
Joined: Tue Jul 27, 2010 6:04 pm
Location: Pottsboro, TX
Motorcycle: 1986 GL1200 Aspencade

Re: speedometer is slow by 10 mph

Postby saltydog » Fri Apr 01, 2011 7:00 pm

And your question is?

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blindmonkey
Posts: 5
Joined: Tue Oct 26, 2010 4:44 pm
Location: Battle Creek Mi
Motorcycle: 1978 Honda Goldwing

Re: speedometer is slow by 10 mph

Postby blindmonkey » Fri Apr 01, 2011 7:12 pm

oh sorry.... Does anyone know how to fix this? I don't want to get pulled over.

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landisr
Posts: 393
Joined: Tue Jul 28, 2009 12:18 pm
Location: Gilbert, AZ
Motorcycle: 1976 GL1000
1994 GL1500A

Re: speedometer is slow by 10 mph

Postby landisr » Sat Apr 02, 2011 9:52 am

Speedometer accuracy on Hondas has been an issue almost forever, but usually opposite what you are experiencing. Everybody is going slower than they think they are. It's been an off and on debate as to whether Honda does it deliberately or it's a manufacturing tolerance issue. Knowing Big Red's engineering strengths, I tend to lean toward the former..

Whatever, the only thing I can guess is that you may have non-standard sized tire(s). There are probably shops that still re-calibrate speedo's (try Google or ?), but I don't think that is something that the average Joe can do easily without doing more harm than good. Other than that, I think about all you can do is either live with it as-is, or replace the unit, but of course guaranteeing that the 'new' odometer will not be accurate.

BUT, maybe somebody else can shed more light on this.

Good luck.

Ron in MI
Beam me up, Scotty. There's no intelligent life down here.

Old Fogey
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Location: Glasgow Scotland
Motorcycle: 1976 GL1000
1979 GL1000
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Re: speedometer is slow by 10 mph

Postby Old Fogey » Sat Apr 02, 2011 10:28 am

The speedo (and tach) can get 'sticky' if the bike has been laid up for a while. Quite often just getting some miles on it with get them working again. If not, the fix is not easy, as the stickiness not in the drive side of the instrument (that can't be slow as it's driven through the cable) but in the needle pivot bearing. That requires a strip down. Not recommended, unless you really know what you're doing. I'd find another speedo as the quick fix.
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