I posted the wrong code, the original workbook also stops the timer when you enter the bike number. Once you enter a value manually you will stop the timer. This is because the code uses DoEvents,which is used to force the application to yield it's use of the processor for one cycle (usually 50ms), it's commonly used to allow other events in your application to fire while you're performing a resource intensive operation. If you don't use DoEvents you can't access the sheet nor use the other buttons.
This code will add the times. If you want to use this workbook then I think you will need to note the bike numbers down and use the button to record the times. Add the bike numbers after the timer is stopped.
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