Speedometer GL1500

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The speedo can't be calibrated, according to Honda. I've never heard of any shop that will work on them.

I carefully moved the needle on one of mine that was off quite a large amount. I've also adjusted the spring on one (on a CB550). That was a lot of work but worked better than moving the needle.

Most just live with the error.

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Monkey Wrench;
I as well would like an answer to that Q.
I have two speedometers on board.
One in the dash, and one that sits in back.
When the one in the dash hits 70,----well---.
you know how it goes, and frankly I'm tired of gussing.
Lets see what the Big boys come up with.
Hilton
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Are you running a smaller tire? that would throw it out!

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No, the front tire is recomended size according to the sticker in the trunk lid.

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All of the Goldwings I've owned tried very hard to tell me I was approaching light speed when in reality I was barely going fast enough to get a speeding ticket. Took me a while to figure out why my average speed was so slow on a day long journey.

The best solution is to mount a GPS where the rear speedo may see it. Tell her the new technology is the one to watch.

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I agree about the GPS, I replaced the speedo cable and the gear thats on the front wheel ( not because they were off, but because they just didnt work at all) well now I guess im going about 10 mph slower than what the speedo tells me, gets worse as you go faster. So I recommend anyone who is going to fix one to just get a GPS and mount it permenatly to the bike! If any part of my speedo messes up in the furture I will remove the speedo part of the instrument cluster and mount a GPS there (I dont care about keeping this stock looking). I will remove the speedo cable from the bike completely and cap off the gear on the front wheel to keep crap from getting in it.