YZ125 Jetting Specs for Socal

sdhuskyrider
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San Diego, CA US
sdhuskyrider
Edited Date/Time 11/17/2019 7:12pm
Does anyone have some solid jetting specs for an 05+ YZ125 for Socal that they would share before I start throwing brass at it? It's decent off the factory floor but doesn't sound super crisp. I run pump gas but I'd be ok with 50/50 pump/C12 if someone had specs for it. Not interested in Pro Circuits straight C12 specs.
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Blackjack31
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Blackjack31 11/14/2019 11:01pm
11/14/2019 11:01pm
All depends on where you’re at. Elevation, temperature. What’s wrong with your jetting now? Like why don’t you like it? It’s not crisp off the bottom, top, middle? I’m in North Carolina so I can’t give you jetting sizes but myself and a lot of others can lead you in the right direction as to what you may need based off of what your bike is doing.
FGR01
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FGR01 11/17/2019 7:11pm
11/17/2019 7:11pm Edited Date/Time 11/17/2019 7:12pm
In my 2006 YZ125....

pilot 42.5

main 400

needle, stock 2006 needle in stock clip.

Bill's pipe and silencer

110 octane VP MS100 (race gas sold in the pump here), 32:1 with Maxima Super-M.

Bike rips. Riding in Arizona 1,000 - 4,500 ft. I fit's cold and lower elevation I'll put a 410 main in and close the air screw down a little.

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