I had an 06 XTR for nearly 4 years and rode it through all year round. The electrics are no worse than on some other bikes.

The only suggestion that i would say is if you get the bike under the left hand side of the tank is the main wiring harness which has alot of connectors on it. A bit of silicone around the connectors should stop any of the water getting in around the connector.

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Plough on