Ok i've had my xtr a while now and have been doing plenty of little jobs while i've had it, but the more i'm doing i'm begining to question if it had the major service they say it had when i purchased it.

I've a week off coming up soon so to be safe i'm planning on changing the oil and filter, the spark plug, and checking the valve clearances, i've already replaced the air filter so i'm not concerned about that, and if i have time i may renew the brake fluid and change the coolant too.

My first question is what sizes are the 2 washers for the oil drain plugs?
Are those quick connector oil plugs worth the money? http://www.off-the-road.de/en/XT-660...e-M14x1-5.html

And is there any other things i should consider checking while i'm there?