did a thread on this a long time ago on another site
nobody was interested so it isn't very detailed but it gives you the basic idea
http://www.dirtbikeworld.net/forum/show ... hp?t=57565
will add a bit more info later
I removed the copper washer on the hex bolt that holds the oil pressure relief valve in and added a small washer to increase preload. total increase about 1.5mm.
as stock the oil pressure at idle was 20 psi going to 30 at high rpm (7000) now its 30psi at idle and 40 at high rpm.
also...
