Ivan old fellow, the oil level is one of the hardest games to play with these bikes!!! Dont forget:
1. Ensure that the bike is level so you need a centre stand or a paddock stand or a piece of wood under the side stand.
2. You must follow the instructions to the letter. Start the bike from cold and then switch off after 5 mins.
3. Remove the dipstick, wipe it, then replace it resting it without screwing it back in.

DONT PANIC!! In general (I have had 3 XTs and now a Raptor) these engines use little or no oil at all so once you get the level right you are good to go.

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(Now sold on, sob) 2011 Blue XT660X with gold wheels, was 26,500 km.
Engine mods: K&N Stage 1 filter, DNA Stage 2 filter, snorkel removed, Kev fuel mod fitted.
Plus: smoked Puig screen, Yam aluminium sump guard, Yamaha / Acerbis handguards, Givi Trekker aluminium side cases, Leo Vince X3 cans plus Kev front fork mod and Fender Xtender. Just fitted Michelin Road Pilot 3 tyres.

SOLD the XTX for a Super Ten 1200. And just bought a Raptor 700 so staying on here for some tips....