Ditto on the YS 20/20 fuel... (Powermaster)
I use it in all (2 Saito 1.80's, 1 Saito .80, 1 Saito 72 and 2 YS 91's ) my four strokes and some two strokes. I started using it because my YS 91 engines didn't run well on anything else.

This reply was intended for Kris3D's thread "H9 Edge abd Moki 2.1"