GS450E Speedometer Ratio

[Legionnaire]

I have been searching low and high for some info on the speedometer ratio of a 1981 GS450E, I have two 18" wheels. Maybe there is an equation I can use to find it, if no one knows off the top of their head, thank you very much!

I don't know if this is the best place to ask this, but any help would be much appreciated I have used the search and found nothing particular to me.

The Speedometer and Tach from MIKEXS are really awesome mini ones, and I am hoping that they will fit my bike. http://www.mikesxs.net/products-46.html#products

Thanks for the info ahead of time!

[pete]

Hmmmm I think you'd need to measure the circumference of the front tyre to start with.

Then you'd need to work out how many revolutions the cable makes for one revolution of your front tyre.

That would give you some sort of ratio, although maths hurt my head too much these days...

[bryan88]

Don't know if this will help, but one of the ways you calibrate a bicycle computer is to literally messure 1 revolution of the wheel on the ground and use that figure (eg 2225mm)