What oil do you recommend for a RRJ NC23 pls?

Also - do you use an engine flush or is it ok to just get the oil hot before draining.

Thanks

Best oil that I have found is Castrol Racing 1 full synth.. and yep, just get the engine nice a hot and drain well and remove the old filter i.e. leave it for at least 30 mins dripping... then full up with nice new oil...

Col

I like to follow the simple things in life. The bike was developed in the 80s and thats the type / spec oil i use in both road and race bikes of that era.
I mainly use Castrol 15/30 which has never let me down.
Fully synthetic oil is (in my very small ) opinion not suitable in an older generation engine.