Yz125 Big Bore Kit 144

To assemble this cylinder kit on models yz 125 lc 1997 1998 you have to replace the original muffler with a version for the year 1999 2003 and for 1997 1999 models you have to order the 2 torsion original springs valve yamaha year 2000 2003 all athena products which are manufactured with higher displacement and power than those permitted by law of the country where the end user.

Yz125 big bore kit 144.

X2 for gorr may take a month turn around but worth the wait. Re chamber to work with the custom wiseco big bore piston. The easiest route to making your yz125 a yz144 would be to install the athena big bore kit. Yamaha yz 125 lc 1997 2004.

We strip your stock cylinder weld the ports for perfect port timing then bore the cylinder from 57 5mm to 56mm 134cc. We have built more yz139 s over the years than any other kit we offer. In the battle of the big bore 125s. Features a forged piston that s been molybdenum coated for high performance use and extended wear life.

I bought it and the previous owner said he put a fresh ring in it about 2hrs before i bought the bike i put about 20 hours on the bike after i bought it and decided. The decade old yamaha yz125 has been growing long in the tooth for some. We installed an athena 144 big bore kit that included a brand new nickel carbide plated cylinder with enlarged water passages cylinder head 58mm vertex piston with rings pins clips gaskets modified power valves o rings and complete. Big bore cylinder big bore piston piston pin piston pin rings gasket kit.

This kit requires you to send us your cylinder head and power valves for modification. The yz144 big bore kit does not come with an exhaust pipe so we ordered a 239 95 gytr exhaust pipe and 124 95 silencer to enhance the package. To achieve optimum performance re jet the carburetor with the available jet kits. In our opinion it is the perfect bore only displacement available for the yz125.

The 2 stroke revolution is real and our yz144 m spec big bore kits truly make your 2 stroke equal to or better than modern 4 strokes. This was not money well spent. No crank mods required. If you re a fan of the yz125 or other small bore two strokes check out the exclusive link to our 125 stroker project at the bottom of this post.

Hey guys just picked up a super clean 06 yz125 with a 144 bb kit some backstory. This bike has a stock jug modified bored to a 144. You can put in a completely new bottom end big bore kit either 135 or 144. Click here or the picture below to order your yz125 athena big bore kit from amazon today.

It has everything you need from piston and cylinder to all the gaskets. Athena s yz144 kit tend to have head leak issues.