Thread: incorrect speedo readings
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  # 9  
Old 09-11-09, 10:14
deiaccord deiaccord is offline
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Join Date: Oct 2008
Location: Guernsey, Channel Islands
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Quote:
Originally Posted by DickyC View Post
Whilst away last week I had the GPS on from time to time and discovered that mine reads 4mph quicker at motorway speeds i.e. 80mph displayed is actually 76mph on the GPS. Equally 37mph displayed is actually 35mph on the GPS. I am not worrying about this as I assume its just cable stretch and sort of normal (whilst bugging) and might stop me from breaking the speed limit in Guernsey (35mph) but now I know . . .

Definately take it back to be replaced. 20mph overead is taking the micky though and as you say, adding miles needlessley.
Certainly some deviation is normal, 3-4mph is what I'd expect from a Car, bikes are usually more and most here found 7-10% deviation the norm for their Tenere so yours is unusually accurate!

I'd reiterate comments that as the bike is only 8 months old I'd be looking for a waranty fix regardless of cause.