Don't buy into that over priced oil at the shop. I raced the 07 baja 500 using castrol GTX 20- 50 in my tranny, as long as you change it often I have never had a problem. I have had problems using that over priced crap though.What type of transmission oil should i put in a kx 125?
Quality, brand name, 4 stroke motor oil.
All 2 stroke engines require motor oil in the crankcase.What type of transmission oil should i put in a kx 125?
Try looking in your owners manual! It will recommend the viscosity and rating to use...