chain wax. Everything else i have tried colects dirt and sand.

 

2 words CHAIN WAX..wd-40 will eat away at your o-rings and new chain arnt cheap!!!!

 

BelRay Super Clean chain-lube, only way to go. I used to use chain wax, but it builds up so hard on the sprocket edges over time that it takes a platic knife to scrape it off.
Both these lubes won't fling off, keeping the back of the motor and underside of the fender cleaner. Neither actract dirt, chain stays clean.
Both are designed for o-ring chains.
The o-rings must stay lubed, to remain soft and supple over time, the chain needs a barrier against rust, however any lube applied to the rollers where they contact the sprockets will be gone within minutes of riding...
Like JSsDS said - keep pressure washer clear of chain - water forced under the o-rings will never get out, and it will rust from inside out.