bit of a trick to checking the oil level on the XT660s...

After putting the oil in... take the bike for a short ride..
"or let it idle for a few minutes"
then let it sit for a few minutes & check the oil level
on the dip stick in the tank... add oil as needed..

PS... just sit the dip stick on the filler don't screw it in
to get the oil level

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Harley Davidson..
The easyest way to turn gasoline into noise with out the side efect of horse power...