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SOHC.co.uk Forums => CB500/550 => Topic started by: florence on July 03, 2019, 09:51:46 AM

Title: CB500/4 Speedometer
Post by: florence on July 03, 2019, 09:51:46 AM

The odometer on my bike has stopped working.   The speed bit is OK but for some reason the miles don't change.  Is there an easy fix for this or will I need to look for a second hand unit?  (would have to be faded and battered not to stand out too much)

The base appears to be pressed together and not easy to undo.

Title: Re: CB500/4 Speedometer
Post by: kent400 on July 03, 2019, 10:13:45 AM

Obviously the mileage counter drum is not being driven so it's likely one of the internal gears has stripped.  Repair is possible provided it's not the spiral gear on the drive end. Image will show the gear train to the counter drum. 

Title: Re: CB500/4 Speedometer
Post by: heliwilly on July 03, 2019, 11:46:44 AM

Florence,

I've got this one off a CB 550, approx 1974.

Bill W

Title: Re: CB500/4 Speedometer
Post by: Trigger on July 03, 2019, 11:55:12 AM

Different clock and size, will not fit a  CB500/4 bracket  ;) ;)

Title: Re: CB500/4 Speedometer
Post by: heliwilly on July 03, 2019, 12:19:52 PM

Cheers Trigger, I wasn't sure if it would fit as they are a similar machine.  Bill W.

Title: Re: CB500/4 Speedometer
Post by: Bryanj on July 03, 2019, 03:37:07 PM

Florence does the cable attachment come out of the back dead straight or at an angle?

Title: Re: CB500/4 Speedometer
Post by: florence on July 03, 2019, 04:04:19 PM

Bryan, it is straight.

Title: Re: CB500/4 Speedometer
Post by: Bryanj on July 03, 2019, 05:55:56 PM

Not sure if i have an available "spare" of that. I will have a look but cant for at least 2 weeks

Title: Re: CB500/4 Speedometer
Post by: florence on July 03, 2019, 08:50:36 PM

OK, thanks for looking and thanks for the offer Heliwilly but my clocks are smaller type.

Title: Re: CB500/4 Speedometer
Post by: matthewmosse on July 03, 2019, 10:32:06 PM

Cb250 superdream innards fit the same case and give correct speed.

Title: Re: CB500/4 Speedometer
Post by: florence on July 04, 2019, 11:29:58 AM

Useful to know, thanks Matthew

Title: Re: CB500/4 Speedometer
Post by: jon stead on July 04, 2019, 07:15:01 PM

I’ve got a speedo to sell if you’re interested. Cable attachment comes straight out of the back.

Title: Re: CB500/4 Speedometer
Post by: florence on July 05, 2019, 09:40:08 AM

Jon, how much would you like for them?

Title: Re: CB500/4 Speedometer
Post by: jon stead on July 05, 2019, 05:31:23 PM

Hi Florence, I’ve pm’d you