Help needed with an H1 model I'm stripping for track use. What does the pink wire on the speedo do?
Is it something to do with the restriction?
I could also do with a wiring diagram is there any around on the forum?
Thanks folks.

yes, its the wire that goes from the speedo restriction to the CDi, put a (i think) 100ohm resistor in place of the clock and you will be fine...ive got a UK-spec L-model so i dont have any restriction issues.