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This is on a 82 GL500i. I am getting alum dust and some shaving out of the final drive unit. When I change the oil the first time. I put in 80-140 oil that we used at work for years, call the Co. and they said it should not be a problem. I took a little road trip 150 miles one day 150 the next. The final drive unit was on the hot side IMO. But I never had a shaft drive bike so I was not sure. Today I checked the final drive and seen alum dust in the oil.

Change the oil, and took it for a ride of about 30 miles to warm the oil up and changed the oil. Any Ideas? I would l like to flush the unit. I put in a 80-90 lube. What would be good to flush the unit with?

Thanks Ev.
 

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Anything can be used to "flush" a gearbox/engine/diff. Make sure it's compatible with oil.

Could use Kerosene, Petrol, degreaser, but only operate bike wheels by hand.

If you need to drive it every day, put in a light weight oil, say 20 or 40W and only go a short distance. About 10 or 20 mile, then drain. (with engines, change filter too). The benefit of using thinner oil is it also gets the metal up to operating temp, which can aid in loosening some debris.



Replace with the good stuff, I think it's about 85-90W diff oil, and check again at next interval.



If you are still getting Ally in the oil, RIDE NO FURTHER !! Remove the rear wheel and check the drive unit and hub. Could be a nasty ride if it locks up.
 
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