Boyesen Supercooler Water Pump Kit Yamaha Yz125 98-04 Black Chain Guides Uses a flat crankshaft protector

Uses a flat crankshaft protector designed to be used on KTM applications which use a bolt to retain the flywheel

Model Year Pitch Part Number CR 250 92-95 520 FXFS 11-13  CR 250 96-01 520 FXFS 11-13  CR 250 02-03 520 FXFS 11-13  CR 250 04 520 FXFS 11-13  CR 250 05-07 520 FXFS 11-13  CR 250 88-89 520 FXFS 11-14  CR 250 90-91 520 FXFS 11-14  CR 500 88-91 520 FXFS 11-14  CR 500 92-01 520 FXFS 11-14  CRF 450 17-19 520 FXFS 11-13  CRF 450  02-03 520 FXFS 11-13  CRF 450  04-16 520 FXFS 11-13  CRF 450 RX 2019 520 FXFS 11-13  CRF 450 X 05-18 520 FXFS 11-14  TRX 450R (QUAD) 04-05 520 FXFS 11-14  TRX 450R/ER (QUAD) 06-15 520 FXFS 11-13

TE 150 TPI 20-23

These boots are fitted with adjustable straps and metal buckles which are also adjustable

Boyesen Supercooler Water Pump Kit Yamaha Yz125 98-04 Black Chain Guides Uses a flat crankshaft protectorReduced 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.