Posts
9
Joined
7/16/2020
Location
Saginaw, MI
US
I am looking into putting a 144 kit in my 2008 YZ125. The bike has an FMF pipe and V-force reeds with stock jetting. Other than creating clearance for the larger cylinder, is there anything else that is NEEDED to make this 144 kit perform at its best?
recently rebuilding my nephew's 144. I have found that you will need to spend some time dialing in the
jetting. It's funny- searching around I see people say you need to go leaner with a big bore but that is not
what we are finding. We are up several on the main.>>>>https://www.vitalmx.com/forums/Tech-Help-Race-Shop,42/Blue-pipe,1379204
And you absolutely MUST measure your squish and get it right on. The kit will come with a couple
different thicknesses of base gaskets but there are others available, too. Bust out the solder and calipers
and spend some time measuring. The 125 base gasket will work so
you can use OEM, Cometic, etc. for different thicknesses. On that note, keep an eye on those Athena gaskets. We've had a couple of them fail. I think their gasket quality is a little suspect.
I rebuild the motor with a stock cylinder bored to 134 and have since sold the bike.
Hence, the Athena kit is for sale. Message me if interested.
The Shop
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