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SOHC.co.uk Forums => CB750 => Topic started by: billy192 on June 20, 2014, 02:18:01 PM

Title: Speedo gear box
Post by: billy192 on June 20, 2014, 02:18:01 PM

I have as you know a CB750 K6. the speedo is recording 70mph when i am doing 50mph. as i have spare gear boxes from a 250 and 500 could i have put the wrong one on or are they all the same as the front wheel is the same DIA?
Billy
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Title: Re: Speedo gear box
Post by: Trigger on June 20, 2014, 02:29:16 PM

Billy, i had the same problem with a CB550 clock. Stripped it - rebuilt it with a load of new parts and still had the same problem. In the end i sent it to Clockndials and he fixed it. May be worth giving him a ring.

Title: Re: Speedo gear box
Post by: Bitsa (Ralph Wright - RIP) on June 20, 2014, 03:09:33 PM

Trig,
Its taken me ages to get a decent set of clocks and even now I am not 100 percent happy with those.I have had two sets done by pros and there still shit in my opinion.
Got there number mate?Forgot to add the worst was REPLICAS from DS sent them back twice and the third set still crap.
Cheers
Bitsa

Title: Re: Speedo gear box
Post by: Green1 on June 20, 2014, 07:12:28 PM

At least you have the option of replica clocks my k1 speedo has been pants from day one and made far worse after it's bump on the nose.The trip and odo are now jammed and it reads about 20mph+ to fast.A second hand k1 speedo sells for around £160+ :o
I have just tracked down a low mileage Laverda Jota speedo which is the same internally as the k1 so hopefully after a rebuild it will be as good as new.

Mick

Title: Re: Speedo gear box
Post by: Bryanj on June 20, 2014, 09:51:22 PM

500 and 750 gearbox are the same part number, not sure about 250

Title: Re: Speedo gear box
Post by: Bitsa (Ralph Wright - RIP) on June 21, 2014, 09:36:06 AM

Green 1,
What is good about having options when they are crap ones?
Like I have said b4 I have no problems with other firms making duplicates but for christ sake make sure they work good even if they cost double.
Cheers
Bitsa

Title: Re: Speedo gear box
Post by: billy192 on June 21, 2014, 10:02:10 PM

Thanks Bryan,
I thought i would never get the answer.
I will try all three as now I am not sure which is which LOL

Bitsa your correct do it well or don't bother
Billy

Title: Re: Speedo gear box
Post by: Bitsa (Ralph Wright - RIP) on June 22, 2014, 10:48:50 AM

Billy
Bryan could be right Cant find part number for your 250G5 but for the 360G5 I assume that they are the same the middle number is 317 where as 750 is 300
Hope that helps you out
Cheers
Bitsa

Title: Re: Speedo gear box
Post by: billy192 on July 02, 2014, 12:53:57 PM

is the part number stamped anywhere on the part?
Billy

Title: Re: Speedo gear box
Post by: Bitsa (Ralph Wright - RIP) on July 02, 2014, 01:56:05 PM

Billy
Just looked on mine sorry mate could not see anything from the outside
Cheers
Bitsa