YAMAHA YZ65 2022

OEM SPECS 

FRONT TYRE SIZE: 60/100-14 (1.60x14 RIM)
REAR TYRE SIZE: 80/100-12 (1.60x12 RIM)
CHAIN: 420x114
FRONT SPROCKET: 14T
REAR SPROCKET: 47T
MAIN JET: 142
PILOT JET: 48
SPARK PLUG: BR9ECM