Kit 290cc Ø83mm ATHENA racing for YAMAHA YZ 250 F - 2001/2007 and WR 250 F - 2001/2012

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

VERTEX piston, high compression graphite 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 cubic capacity, the compression as well as the reduction of the friction, the temperature in the room will offer more performances to your machine!

Here, it is not really the maximum power gain that is sought after! The power comes sooner, faster, and a good increase in torque is present!

It's all that make it a very robust and powerful kit. Mounts with the original cylinder head without modification of the latter.

At the bottom of the page, you will find all the spare parts for this kit. The piston, the segments, the seal pocket ...

Mounts on :

Off-road Yamaha WR 250 F - 2001/2012
Off-road Yamaha YZ 250 F - 2001/2007