Boyesen Supercooler Water Pump Kit Yamaha Yz/Wr426F 00-02, Yz450F 03-09, Wr450F 03-15 Black DID Reactive Memory Foam (RMF): A

Reactive Memory Foam (RMF): A soft and pliable material in its natural state but hardens when force is applied to it

EN/MX144 19-23

EN 13634: 2017

YX250X 23-24

The Mach 5 with a D3O back protector sewn in to the back panel is our first street riders pack with incorporated advanced back protection

Boyesen Supercooler Water Pump Kit Yamaha Yz/Wr426F 00-02, Yz450F 03-09, Wr450F 03-15 Black DID Reactive Memory Foam (RMF): AReduced to its common reasons for being essential in an internal combustion engine, cooling system efficiency can have a dramatic influence on the longevity of the internal working components of your bike's engine. These include the reduction of thermal stresses and strains caused by pre ignition and detonation (particularly the latter), distorted cylinder bores, potential damage to pistons and rings, and damaged valve train components.