wr 426 switch

My son bought a wr 426 2001 model, Under the tank on the left hand side there has been a after market switch fitted. The bike runs with the switch in the on or off position it doesnt seem to do anything!! does anyone know what this switch is for??

i'd bet it was a kill switch for the lights!

My son bought a wr 426 2001 model, Under the tank on the left hand side there has been a after market switch fitted. The bike runs with the switch in the on or off position it doesnt seem to do anything!! does anyone know what this switch is for??

See if the wires are taped into the TPS on the side of the carb. It sounds like the previous owner wanted to be able to switch the mapping back in forth.

Ok thanks for your help the switch goes to TPS as bygdd said! It doesnt seem to make any diff on or off? we have left it in the off position for now and will play with it as we go along. Thanks again guys.

The switch (off) will make a noticable change in 'stutter' when you are at constant partial (mid) throttle. Better low end (back on).

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