There's a thread all about the hypermotard oil line conversion here.
http://www.ukmonster.co.uk/monster/s...ad.php?t=50829
Go to post #25 for info on the nipples. If you have an early Monster you could well have to change the nipples in the engine and oil cooler to make the hyper lines fit as the early and late types have different fittings on the ends of the lines which do not interchange. The nipples however are a very simple swap and not too dear either.