Best type of Oil WR426

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!

It also has an STM slipper clutch as the guy who owned it before me only rode it as a racing SM

As long it is NOT friction modified you can run conventional, semi- or fully synthetic. It boils down to personal choice. I've run conventional, fully synthetic Mobil 1, and now semi-synthetic in my WR 426. If it is a good price, go for it. It is all about changing the oil often, more so than the type.

+1 well said.

I've run conventional, fully synthetic Mobil 1, and now semi-synthetic in my WR 426. If it is a good price, go for it. It is all about changing the oil often, more so than the type.

Cheers for that got 9 litres of putoline 10w40 fully synth half price in the end!

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