Yamaha YZ125X 2023 Owner's Manual page 34

4th
5th
6th
Secondary reduction ratio
Final drive
Air filter
Air filter element
Air filter oil grade
Carburetor
Type  quantity
ID mark
Main jet
Main air jet
Jet needle
Needle jet
Cutaway
Pilot outlet
Pilot jet
Bypass 1
Air screw turns out
Valve seat size
Starter jet 1
Power Jet
Float height
Throttle grip free play
ENGINE SPECIFICATIONS
1.353 (23/17)
1.176 (20/17)
1.056 (19/18)
3.846 (50/13)
Chain
Wet element
Yamaha foam air filter oil or other quality foam
air filter oil
PWK38S  1
BRX1 00 (AUS, NZL)
BRX2 10 (CAN)
#160 (CAN)
#162 (AUS, NZL)
#200
NYCF-2 (CAN)
NYEE-2 (AUS, NZL)
2.9(#6)
#65
0.8
#60 (AUS, NZL)
#65 (CAN)
1.5
1-1/2 (CAN)
2 (AUS, NZL)
3.8
#85
#35
6.5 mm (0.26 in)
3.0–5.0 mm (0.12–0.20 in)
2-3