Feb 23, 2012 · The YZ144 kit includes a brand-new nickel carbide-plated cylinder (with enlarged water passages), cylinder head, 58mm piston with rings, pins, clips, gaskets, modified …

Nov 15, 2017 · The stroked bike is more expensive and more powerful. Between the YZ134 and YZ144 BBs, I think the YZ134 is a little more mid-top and the YZ144 is a little more low-mid, …

Oct 2, 2017 · The Yamaha YZ144 we built has a much stronger hit over the YZ134, but the powerband is shorter and signs off faster.

Aug 12, 2023 · The easiest route to making your YZ125 a YZ144 would be to install the Athena big bore kit. It has everything you need, from piston and cylinder, to all the gaskets. It's no …

Jan 26, 2016 · Athena's yz144 kit tend to have head leak issues. Also the yz125 (at least the 05 up) need the cases trimmed for the crank clearance when doing a big bore. Save

Our yz144 has pushed the amount of power thought possible out of a yz125. We have hit 45 hp on some builds! Requires case clearance.-Cylinder boring-Stage 3 144 porting, tailored to …

On this week’s Two-Stroke Tuesday we take a look back at a Yamaha YZ144 big-bore project we did in 2012. We gave the machine more horsepower and some updated styling. There are …

WARNING: 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 …

On this week’s Two-Stroke Tuesday we take a look back at a 2013 Yamaha YZ144 project built as part of a three bike story. This thing was a blast to ride and at the time turned a lot of heads.