144 back to 125

Cheddar
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Cheddar
Edited Date/Time 12/4/2019 7:35pm
there is a beat up 2009 YZ144 on craigslist I'm thinking of getting and putting through the ICU (my garage). Who's got the best kit to get a 144 back to 125? Preferably high quality and all in one box or as few parts as possible.
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kb228
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kb228 11/13/2019 5:34am
11/13/2019 5:34am
Yamaha has the best stuff to go back.
Cheddar
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Cheddar 11/13/2019 6:39am
11/13/2019 6:39am
yes obviously OEM is best but I can't find everything in one spot. If I order a cylinder is the power valve assembly included? Does the 144 kit use the OEM power valve?
kb228
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kb228 11/13/2019 7:04am
11/13/2019 7:04am
Every major online retailer sells every part you need. You simply need to figure out what you need.

Id imagine you can get new power valves, a cylinder, and a piston kit and be good to go.
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Bruce372
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Bruce372 11/13/2019 8:27am
11/13/2019 8:27am
You'll need a head also.

Maybe try Ebay for a complete setup
Paw Paw 271
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Paw Paw 271 11/14/2019 6:00pm
11/14/2019 6:00pm
Your old 144 power valves will not be correct in the 125 as they would have been cut.

Paw Paw
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NoMuff2Tuff
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NoMuff2Tuff 12/4/2019 7:35pm
12/4/2019 7:35pm
All the parts are readily available and you will need
Cylinder head retail prices $94
Cylinder $361
Left power valve $162
Right power valve $155
You can pick up a piston kit and gasket kit from around $100-$125 depending on which brands.
A good chance you can find these parts used on Ebay cheaper. I'm not sure what years use the exact same parts but I think from around 06 to 20 are the same parts. I don't think you will find the parts you need in a kit but you can get everything in one shot from someone like Rocky Mountain ATV/MC


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