cost of speedo calibration.

[nairb]

So I need to get one of the speedo's recalibrated.  Its showing 85mph+ at 70.  I have put up with it for years but have decided to get it sorted.

Just wondering what is a good price for such a bit of work.  The clock is in goodish order...... just a not so accurate.

It's off an **750.

Ta
Nairb

[Athame57]

So I need to get one of the speedo's recalibrated.  Its showing 85mph+ at 70. 

Surely this keeps you out of trouble?

[Bryanj]

Dont know of any one doing this, are you sure its the correct speedo for the bike and what bike is it?

[AshimotoK0]

Peter Horton is your man. Kent400 on here.
Wondering too if it's the correct speedo for the bike though.
I think there is slight adjustment on the hairspring but a delicate job.

[Spitfire]

The speedo on my 750F1 is 7 mph fast at all speeds, I just live with it, when I got the bike on the road after rebuild it frightened me to death when I was following my wife in the car through speed camera infested Liverpool.

Cheers

Dennis

[nairb]

It's the right clock for the bike.  It's a gt750.  I have had the bike for many years and don't remember if the speedo issue has always been there or has got worse over time.  What could be a problem is if the speedo drive/wheel (front) is off a gt550. I think they are a different gearing.
I have been quoted 150 quid to check the speedo.

I will ask "Kent400" to look at a cb550 clock, which I have had from new.  It's slow to rise in mph and slow to fall back to zero.  This time I know the clock used to be ok.

All these things are getting on for 50 years old.  Did they ever expect them to be working all these years later.

nairb

[Bryanj]

If the front wheels are the same diameter the drive box will be the same, is this Suzuki GT or Kawasaki GT

[Jan B]

How precise would you expect the speedo to be calibrated? They are not that precise from stock.

[Bryanj]

According to c&u must be accurate to 10% but now only allowed to read high not low

[nairb]

If the front wheels are the same diameter the drive box will be the same, is this Suzuki GT or Kawasaki GT

I was not brave enough to assume that.  But having just checked the part numbers for a 1974 gt750 and most years of a gt550 the drive box numbers are all the same.
Now, if I was really keen I could nick the speedo off the gt550A and tape it to the 750 and see if it still reads ok.

How precise would you expect the speedo to be calibrated? They are not that precise from stock.

Both the cb360 & cl450 show about 40mph in a 40mph zone (in those areas that show your speed).  The Suzuki shows 50+.