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NO, NEVER! YZF's are four strokes. 2 cycle oil is for 2 cycles...
6 oz of oil per fork
1litre or 1.2 with new oil filter
3.07 Quarts with filter change.
I like castrol Activo part synthetic
2.85 US quarts
1.13 liters
3.07 Quarts or 2.9 Liters
AMS SYNTHETIC 10W-40
Yamaha yzf r125 mileage
Mobil One Race 4T...Clutch is in the crankcase..so the clutch is lubricated with the same oil as the rest of the engine...Mobil one is full synthetic, and I have been told not to run less than 20w50, although I use 10w40 in my yzf 450 and my yzf-r1......
The yzf is fuel injected no carburetors