I am about to attempt to adjust the tappets on my 400 and have a service book so have got the clearance figures as there is bog all other information I just want to know if there is anything in the "procedure" that I should be warned about first. I'm a fairly experienced "tinkerer" but more used to mucking around with mouldy old Land Rovers than bikes and just want to know if there's anything out of the ordinary involved.