HOT CAMS CAMSHAFT STAGE 1 EXHAUST YAMAHA YZ250F 17-18 Alternates 25-1165

Alternates 25-1165

Exhaust Valve Spring Heavy Duty Psychic Made From An Ultra High Strength Alloy Machined To Precise Specifications Heat Treated To Increase The Durability CRF450X 05-20 TRX450R 06-09 TRX450ER 07-14

*2007 & 2008 Grizzly 700's require the modified engine crankcase panel with the external oil tube

CRF250R CRF250RX CRF250X CRF450R CRF450X CRF450RX KX250F KX450F KLX450R RMZ250 RMZ450 RMX450 YZ250F YZ250FX WR250F YZ400F WR400F YZ426F WR426F YZ450F YZ450FX WR450F KTM 250SXF 250EXCF 250XCF 350EXCF 350SXF 350XCF 400EXCF 400SXF 450EXCF 450XCF 450SXF 500EXCF 520EXCF 530EXCF 98-21

this kit is an essential addition to your maintenance arsenal

HOT CAMS CAMSHAFT STAGE 1 EXHAUST YAMAHA YZ250F 17-18 Alternates 25-1165Camshaft Hot Cams Exhaust Good bottom end and mid range increase up to 10,800 RPM with slight top end loss. Uses stock valve springs.