CP piston kit 12.8:1 for Yamaha YZ YZF WR WRF 250 05-09

Up for sale is a brand new CP racing forged-aluminium piston kit (12.8:1 compression) to suit Yamaha YZ250F and WR250F four-strokes from 2005 through to current.  The piston kit is brand new, still in the packet.  Would be excellent as a spare or replacement for your YZ or WR if you do a rebuild, or if you want a decent performance increase.  Here is a little blurb straight from the CP Pistons information:

CP Standard Features

Anti Detonation Grooves (Contact Reduction Grooves) are grooves that protect the top ring by disrupting detonation waves. Also know as contact reduction grooves, these grooves limit the piston/cylinder contact during high temperature and RPM.

Accumulator Groove is a V shaped groove machined in the 2nd ring land to collect excess blow-by between the top and second ring. This groove collects residual gasses during combustion and alleviates top ring flutter while increasing ring seal.

CP groove stands for Constant Pressure Groove. This groove works as a channel on the lower part of the top land that equalizes pressure to the back of the top ring groove.
When used in combination with lateral gas ports, the CP groove helps keep gas ports clear of carbon build up. In addition, the CP groove prevents the top land from smudging into the top ring if the land rubs the cylinder bore.

Double Pin Oilers in conjunction with our dual fed reservoir add twice the amount of oil from the cylinder wall to the wrist pin.

X-Forgings are designed to minimize friction and reduce weight without compromising strength. With the use of bracing and ribs, the forging is configured by adjusting the weight balance between high and low stress areas. This design enables the use of a shorter pin for added strength and weight savings.

Radius Domes are used to maximize quench while eliminating possible hot spots that promote detonation.

Cam and Barrel: Extensive research and development has been done to find the optimum skirt shape for each piston. Having the correct cam and barrel on a part promotes the following:
1. Tighter clearances
2. Less noise
3. Better ring seal
4. More power
5. Durability
Depending on the forging and application, different cam and barrel profiles are utilized for maximum performance.

CP Pistons are known worldwide for being top-quality, high-performance pistons, and are used by many top race teams worldwide.

Usually, these piston kits can be up to $349, but on special for the Buy It Now price of $299!

The piston kit (M1032C) will suit the following models:

YZ250F 05-09

WR250F 05-09

It may also fit other models (older and newer), but please check with your local Yamaha dealer if it will work.

I will send the parts to anywhere in Australia and the world, post to anywhere in Australia would be $8.00 and I will pack it up nice and safe.  The parts can be picked up from Hallam, or depending on sale price I may deliver within Melbourne.

Please check my other listings, I have many parts for sale and you could combine your orders and save on freight.

I accept PayPal, direct deposit, or cash on pickup/delivery.  If you bid, I'd like you to pay within 48 hours.  I've been stuck with items for weeks and weeks that people haven't paid me for!

Feel free to ask any questions, thankyou and happy bidding!