Speedo drive question

[Dusterdude]

I'm thinking about buying an aftermarket speedo and tach assembly for my 1100,is the speedo drive 2:1 or something else?

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[wilcoy02]

I have no idea. I tried to find this out a couple years ago. To no avail.

Please post it if you find it.

 

[Interstate_traffic]

Dont aftermarket tachs and speedos come with a magnetic turn counter? Or are you just swapping gauges?

 

[pidjones]

Honda GL1100 (80-83), GL1100C/AC/DC/IC, GL1100D2D/AD/A/IA/DA, GL1100RB/RC/D/ID/DD 4:1 2240:60mph

 

[Dusterdude]

Pd,are ypu saying it's 4:1?

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[Dusterdude]

It,some are and some arent

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[pidjones]

Dusterdude » Thu Apr 16, 2020 7:00 am[/url]":1yl1n7dz]
Pd,are ypu saying it's 4:1?

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According to this page and others that I find: https://mostynindustries.com.au/speedo-tacho-ratios

But then, a turn of the front wheel with a tape pointer on the cable (removed from the speedo) should tell.

 

[Dusterdude]

Thanks,ill check it out

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[saganaga]

So, how does the speedometer know the wheel size?

 

[pidjones]

saganaga » Thu Apr 16, 2020 3:22 pm[/url]":bquva3zn]
So, how does the speedometer know the wheel size?

It doesn't. That's why changing tire sizes can change the Honda built-in error.

 

[Tom_Charlton]

You can check speedometer accuracy several different ways.

Use GPS to see your current speed and compare that to your speedo reading. Make a mental note how far off your speedo is and keep that in mind when you go over the posted limit. But nobody does that, right?

No GPS? Use the mileage markers along the road and keep your speed at 60. If you travel 1 one mile in one minute by the signs and your watch, and your speedo concurs, congratulations!

Use a calculator to determine your percentage of error. (actual speed divided by indicated speed). If your speedo reads 65 and GPS says 60, you're off by about 8%. At 75 indicated, you are actually traveling 70 mph. Good enough for me.

If your custom speedo can be adjusted to match your GPS, you're golden. If not, just remember how far off you are and enjoy the ride. :moped:

Most Honda speedometers do read fast (5-8 %) which helps Honda avoid product liability lawsuits.

 

[dan filipi]

Another way is to look at the digital speedo in the car next to me.

I usually just ride the flow of traffic or a bit faster to feel more in control, and at a speed the bike feels most comfortable.

 

[saganaga]

My '82 speedometer reads slow. Don't know why - I have the specified tire size.

 

[pidjones]

saganaga » Fri Apr 17, 2020 12:26 pm[/url]":1spv0ruh]
My '82 speedometer reads slow. Don't know why - I have the specified tire size.

That's very unusual for a Honda, who is so notorious for their optomistic speedometers that a company makes "speedo healers" for their electronic speedometers like the GL1800.

 

[Gc33]

Dusterdude » 2020-04-15- 13:30[/url]":irfkglcg]
I'm thinking about buying an aftermarket speedo and tach assembly for my 1100,is the speedo drive 2:1 or something else?

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I was put onto this joint in your neck of the woods...
https://www.speedhut.com/