xr400r help to much oil in sump problem

[shoey]

I have recently purchased a 2005 model xr400r & thought I would do the right thing by giving it an oil change. My mate has exactly the same bike so we decided to change oils at the same time. After draining the frame tank of approx two litres of oil, I removed the side sump plug & was suprised to remove a further 1-1.5 litres from the sump:confused1: . We proceeded to my mates bike tank first ok followed by the sump to which we removed approx a couple of hundred mL. I believe his bike to be correct as the sump is suppose to be dry. We proceeded to change filters & fill oil his bike took approx 1.8-2 lts, mine took approx 3 lts once again leaving oil in the sump.

If anyone can shed some light on my problem I would be most greatful.

Regards
Shoey