ATHENA RACING 293cc Ø72mm kit for Yamaha YZ 250 from 2003 to 2018

Complete kit ATHENA of very high quality! Aluminum cylinder with high quality Nicasil treatment, made in Italy.

VERTEX piston, high compression with pre-ground steel segmentation! Joint ATHENA, (one of the best seal manufacturer in the world), we are clearly on the very top of the range.

The increase of the compression as well as the reduction of the friction, the temperature in the room will offer more performances to your machine!

Supplied complete as in the photo with its piston, clips, segment, cylinder, cylinder head but also the complete seal pouch for your high engine.

Attention, kit itself is not to put in all hands!

1. Project developed by Solid Modeling software
3D which allows to simulate and check the solicitations
mechanical.

2. The aluminum cylinder is made with molds
made of steel and machined by CNC machines that guarantee
vintage tolerance during all
the machining phases

3. Water tanks studied to increase their capacity.

4. Cylinder cores treated superficially with a
special nickel-silica mixture to ensure
better fluidity of the piston and the duration of the cylinder.

5. Machining done in air-conditioned room at 20 ° C, for
perfect control of the bores and the quality of
each cylinder.

6. Perfectly parallel cylinder attachment planes
to eliminate any mating problems.

It ofrre + 4.3ch compared to the origin!

Fits Off-road Yamaha YZ 250 LC - 2003/2018