Speedometer compatibility

[scotgary]

Anyone with a gsxr1100 front end swap know if the speedometer drive gear ratio will make gs1000/850/750 speedometer accurate?

[Gixer1460]

Accuracy is likely wrong - GS1000 - 19" wheel, GSXR 17" wheel - approx 20% speedo error!

[gs7_11]

Actually.......I have a GSXR (slabby, 18" front wheel) front end, complete with GSXR speedo drive, and it drives my GS550/750 speedo accurately enough....+5mph at 80mph, or about the same as standard.

It's more accurate than either of my standard, unmodded GS's! I've checked them against GPS speedos.

Give it a go!

Edited May 10, 2020 by gs7_11

[Ibbo]

Mine is 10mph out at 40, its doing 30.  1100k wheel, and speedo drive, and gs1000 clocks. 

its unusual not to be at least 10% out though.

[Dezza]

15 hours ago, Ibbo said:

Mine is 10mph out at 40, its doing 30.  1100k wheel, and speedo drive, and gs1000 clocks. 

its unusual not to be at least 10% out though.

That's 33.33% out, which is a lot. Fitting a km to miles converter on the cable (are these still available?) would bring things nearer the mark as a km is 0.62 miles, a 38% difference

[Ibbo]

Makes it feel fast though.

[wraith]

8 hours ago, Dezza said:

 Fitting a km to miles converter on the cable (are these still available?) 

Got one fitted to my Kat and not seen one new for sale for a long time.

The Kat has gsxr1100k wheel and Speedo with standard katana (kph clock with the converter fitted) and reads within 5 mph, never been done by a camera or by cops following me, so can't be to far out or under.