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2187-2IN and 2188-2E when used as a set provide increased mid-top torque and horsepower. Produces more power than the OE cams from 5000 rpm and up with no loss at lower rpm. Produces more power than the stage 1 set from 7000 rpm and up.

Ready-to-install, direct bolt-on cylinders require no re-plating and look virtually identical to the OEM cylinders.Cylinder kits include matched Vertex pistons to ensure longevity, performance and reduced engine noise.Nickel Silicon Carbide plated for...

Kit contains crankshaft, main bearing/seals and complete gasket set for complete installationFor Models: 2003 - 2005 Kawasaki KX 125

Kit contains crankshaft, main bearing/seals and complete gasket set for complete installationFor Models: 2007 - 2012 Kawasaki KX 85

2003 - 2005 Yamaha YZ 450F

High power stator kit that is designed to TRIPLE the charging output on the KTM models for which the kit is listedIt replaces the OEM single split wound stator with a modern 3-Phase stator and then feeds into a regulator/rectifier through the included...

WISECO COMPLETE CRANKSHAFT ASSEMBLIES.All new assembly.Crankshafts are sold complete with Wiseco connecting rods and inner crankshaft webs.Factory assembled and trued to within .001.Ready for installation.Crankshafts are completely rebuildable.Top end...

TR Design-Single-cam motorLow and mid RPM torque are increasedTop horsepower slightly increased over stockUses stock auto-decompression mechanismUses stock valve springs

The first and only asymmetrical piston for 250cc and 450cc applications!100% fully machined billet pistonDyno proven power gainsExclusive custom lapped top ring and matching precision machined ring groove provide improved ring seal and break-inArmorGlide...

Stage 2 ITR: Dual cam engineIntake and exhaust cams sold separatelyExcellent midrange to top end gainsUses stock valve springs

Stage 1: single-cam motor.Stage 1 has improved power at all RPMs over OEM.Performs well with stock air box lid and exhaust.Uses stock valve springs and rockers.Uses stock auto-decompression mechanism.

Stage 1: Dual cam engine.Intake and exhaust cams sold separately.No bottom-end loss with strong mid-range to top-end gains.Cam uses stock auto-decompression mechanism.Uses stock valve springs.