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The YZ125 is unchanged for 2024 but since we didn’t give you YZ125 owners any love in 2023 we are here for some suspension and jetting specs. The target weight we used for this suspension setting was a range from 150-170 pounds. The suspension is still a little soft in stock trim, so if you are north of 170 pounds or are an aggressive rider, going up one spring rate does help with hold up and performance so don’t be shy to run these clicker settings with a slightly stiffer springs.
Fork:
Spring rate: 4.2 N/mm
Compression: 8 clicks out
Rebound: 10 clicks out
Fork height: 3mm up
Shock:
Spring rate: 48 N/mm
Race sag: 102mm
Hi Speed Compression: 1-1/4 turns out
Lo Speed Compression: 11 clicks out
Rebound: 11 clicks out
We also got a jetting spec that we liked. The stock jetting is a little rich (nothing horrible) as we got a little bog off faces of jumps so we decided to try Pro Circuit’s jetting spec an just altered it a little for sea level to 4000 feet. We have used a stock pipe/silencer as well as a PC set up with this jetting with good results. We tested with pump gas and it was a little rich so going to a 165 main with pump gas helps. With VP T2 or C12 this jetting below was the best. The key to this jetting spec is the Y3 needle that you can get from Pro Circuit.
Recommended Jetting:
168 main
62 Pilot
Y3 needle in the 2nd clip position