ATHENA racing 478cc Ø98mm kit for Yamaha YZ 450 F from 2003 to 2005 and WR 450 F from 2003 to 2006

Complete kit ATHENA high quality high performance! Aluminum cylinder avaic Nicasil treatment of high quality, 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 on your motocross with the original breech without modification of the latter.

Mounts on :

Off-road Yamaha YZ 450 F - 2003/2005
Off-road Yamaha WR 450 F - 2003/2006