morning chaps, just doing a bit of the old maintenance on the XT660r and i've over filled with oil, will this cause a problem ?

How much over fill ?

__________________
you win some, lose some, crash some
K+N filter, snorkel removed, homemade kev mod (with his blessing), co raised,
Pipeworx cans, r1 led back light, under tray removed, small indicators, handguards, cnc short levers,

above the top line

From the top of my head its just under 3 litres from empty that yamaha recommend with a filter change, if you know how much you put in, just drain the right amount out, if its I little over you should be ok as its a dry sump engine, so over on dipstick is only in the holding tank so to speak, if you got a clean container just drain the lot and start again,

__________________
you win some, lose some, crash some
K+N filter, snorkel removed, homemade kev mod (with his blessing), co raised,
Pipeworx cans, r1 led back light, under tray removed, small indicators, handguards, cnc short levers,

Or get a tube and siphon a bit out, just don't suck too hard!!

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only dead fish go with the flow..................

cheers guys, many thanks, a bit of tube sucking for me tonight then !

I did exactly the same. Added some, no change, added more, no change, gave it a good glug....overfill !!!!
Didn't take long with the tube, but the vapours did taste a bit rank.

__________________
only dead fish go with the flow..................

LOL ! yep, found that out myself !!

I think this might've been covered before...

Drain oil, change filter, add 1.7 L oil (book says 1.9, but mine overflowed once so 1.7 it is), leave bike on sidestand and start it, run for about a minute, then add 0.9 L for a total refill of 2.6 L, and don't bother checking the oil unless the bike has been ridden for a few km. Park on level surface, stop engine, wait a short while (say 30 sec), hold bike vertical and check oil without screwing the dipstick in.

This has been forever the way of oil changes and level checks with oil-in-the-frame Yamahas (including oil-in-the-tank ones like the TTR600), and Hondas for that matter. If you've got the quantity wrong watch out for hot oil spewing out all over the place!

For what it's worth, I only ever check the oil straight after a ride before putting the bike to bed. I've found that any other way leads to inaccuracy and over-filling. After putting a total of 2.6 L in when the oil and filter's changed, I don't check the oil for 1000km or so as I've discovered that the the book value is spot on for my bike.