Hmmmm, 6 light green wires doesn't sound like the GPS to me (should be three wires, yellow/red, yellow/blue blue/green) though the green wire with a red trace should be for the neutral light.
***EDIT***
Ignore the advice above, it couldn't be more wrong if it tried
***EDIT***
Roy's right though, only the mc21 uses a gear position switch, you can see where it is really clearly here on RichG's trackbike, that wire running between the flywheel and the sprocket down to the little black thing held in with one little bolt. Though why it's still there on his trackbike I don't know, there's nothing for it to plug into and nothing to be lit up.
On the mc18 it does nothing other that light the neutral light the mc18 has no different maps for different gears or side stand cut out so the easy test is does the neutral light work?
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Last edited by fontyyy on Fri Dec 10, 2010 11:07 pm; edited 3 times in total