DRZ400E - white/grey residue in oil

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grego

Race Dog
Joined
May 8, 2009
Messages
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Location
Cape Town
Bike
Honda XR650R
my brother has a suzuki DRZ400E.
recently he's noticed a bit of white/grey residue around the dipstick. we suspect some coolant has mixed with the oil, but there has not been a noticeable drop in the coolant level.

could it possibly be due to water/condensation somehow mixing with the oil?
and if not could it possibly be a water pump seal or would the head gasket be the primary suspect here?  :-\

the bike has just short of 16000km on the clock.

cheers
 
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