the manual says for a 32:1 ratio, but a 40:1 is good just dont go with too much more gas in the mixture than that
torque specs air fuel mixture screw on a yz125 2003
4ozs to 1 gallon
32 to 1 hi i have an 04 yz125 and i use motoul 800 and i mix 10L of fuel to 330 ml of oil
32 to 1
Nope
40:1 also yamalube smells the best
Sign up at myyamaha.com and download the service data sheet for your bike which lists the stock engine oil type and ratio. https://www.yamaha-motor.com/sport/myyamaha/login/L3Nwb3J0L215eWFtYWhhL2hvbWUuYXNweA==/starthere.
no.
The correct gas oil mixture for these bikes is 32:1, premium gas is also recommended.
top speed of a yz125 in mph
i have a yz 125 and i use 40:1 so 125ml to 1L
Obviously yz125 is more faster than yz85.