Nope, why do we need autorun

Used VB6 for programming, and RH to change the icon, cause when I tried doing that with VB6, it just gave memory errors. And once again, am an amature.

To find speed in kmph, you have to enter these things in DATA ENTRY BOXES:

Rear Tyre Size in the format "A/BxC" (for example 100/80x17 in 3 data boxes)
Primary Ratio (for example 3.042)
Secondary Ratio (Rear sprocket teeth/ Front sprocket teeth, for example 3.0)
Gear Ratio of the gear selected (for example, your 6th gear has a ratio of 0.84)
RPM your vehicle is running at (say 5000 rpm)

The final formula is:

Speed (kmph) = (RPM x Circumference of rear tyre in centimetres) / (Primary Ratio X Secondary Ratio X Gear Ratio X 1604.13)

And if tyre size is A/BxC (100/80x17)

Then Circumference of tyre in centimetres = {(A x B/ 500) + (C X 2.54)} X 3.1416


You could combine this formula to create a TABLE with 1000-10000 rpm's written in columns, 1st to 6th gear ratios written in rows and their respective speeds in the table.
Few bikers and cagers have created Excel Spreadsheets with such gearing tables.


(NOTE: The example figures in this post refer to a YZF R15 v1 running at 5000 rpm in 6th gear, giving some 70-75 kmph.)

or another easy way to put it is:

Speed = Tire Diameter X rpm/ (all gearings multiplied x 200.9569)

Result should be almost the same.