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cost of speedo calibration.

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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:

--- Quote from: Bryanj on March 15, 2024, 08:32:05 PM ---If the front wheels are the same diameter the drive box will be the same, is this Suzuki GT or Kawasaki GT

--- End quote ---
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.


--- Quote from: Jan B on March 15, 2024, 08:40:13 PM ---How precise would you expect the speedo to be calibrated? They are not that precise from stock.

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

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