Specifications: The YFZ450 is a no holds barred attack on the pure performance market. Engineering focused on light weight, quick acceleration and balanced handling. Largely based on the YZ450F, the YFZ is perfect for competition riding. Transmission Special 5-speed manual ATV transmission. Gear width is increased from YZF and ratio selected for superior ATV performance. Ignition DC-CDI with 3-D mapping. Ignition timing is controlled using TPS information and igniter mapping for precise spark control. Mainframe High tensile steel mainframe, die-cast aluminum sub-frame designed for maximum strength and light weight. Sub-frame is detachable. Suspension Raptor-type double wishbone front suspension. Aluminum square tube upper arms and ball joints with forged aluminum knuckles for light weight. Lights Multi-reflector dual headlights. Compact lights employ 30/30 watt bulbs and feature an easy access aiming screw. Magnesium cylinder head cover and clutch cover for light weight. Reduced stroke crankshaft and connecting rod that reduces displacement from YZ-based engine to 439cc to conform to AMA racing regulations. Special clutch plate thickness increased 0.4mm from YZF for maximum durability in ATV application. Dry sump crankcase with remote aluminum oil reservoir reduces engine size and helps lower the CG and improve performance. New airbox design. Large volume, reusable foam filter, with quick access lid for easy maintenance. Stainless steel head pipe, tuned muffler for maximum durability and performance. Direct ignition coil integrated into the plug cap for reduced weight. Eliminates high tension wire. Dual piston, dual rotor hydraulic front brakes with YZ-type pads that engage Raptor rotors for excellent brake feeling. Separate toggle lever parking brake system. Low profile,800mm seat height and special shape keeps the CG low and assists rider mobility. Taillight with integrated brake light for added convenience and visibility.