New Parts is newly sold in my shop.

YAMAHA 30HP (6J8) surface treatment piston kit for racing.
送信者 ぶろぐ２

It is a piston kit done surface treatment of with a genuine parts.
Treatment is WPC and molybdenum shot.
WPC is common by a car & bike racing.
http://www.nissinkiko.com/English/wpc_syr.htm

The molybdenum shot is a method of construction different from old molybdenum disulfide coating.

Piston, ring, pin,
Treatment is taken by all.

送信者 ぶろぐ２

The right is normal and the left is treated.

There is little heat expansion.
There are few shocks.
I am using this kit by the race.
This is very durable. And the performance improved, too.
This treatment corresponds to various engine.
送信者 ぶろぐ２