Hi peeps, mine needs changing soon and a local bike shop is selling up so all oil is half price!. Which is best type of oil for a 426, 10w40? fully synthetic?, bike will mainly used for green laning, it has yz decomp cam, ported carb, akrapovic exhaust, and made 49~ bhp at the rear wheel. I have completely forgotten what i put in last time! They also have fork oil cheap not sure what weight to run either? Cheers for the replies in advance!