2017 Yamaha YZ450F, ARO LT 137, This 2017 Yamaha YZ450F is fitted with a 2018 Timbersled LT 137, acerbis handguards, IMS rally pegs, and more. TSS shock extra $599 regular pice $999 2017 Yamaha YZ450F MULTI MOTO SHOOTOUT WINNER Last year’s dominant shootout-winner adds many performance-enhancing refinements for 2017 to its huge power and industry-best suspension. Features may include: Innovative Engine Design The revolutionary rearward-slanted-cylinder design of the YZ450F™ allows for a straight down-draft intake with a symmetrical port layout for smooth controllable power delivery throughout the RPM range. This engine design also achieves unmatched mass centralization, for light and nimble handling. GYTR® Power Tuner Ready Accessory GYTR Power Tuner lets owners adjust air/fuel mixture and ignition timing maps to match engine performance characteristics to the rider and track conditions in a matter of seconds with the push of a few buttons, as well as monitor engine diagnostic codes. Launch Control System (LCS) LCS optimizes engine output for quicker, smoother race starts every time, boosting controllability out of the gate. Ideal Frame Rigidity Balance The bilateral beam frame features a carefully chosen combination of forged, cast and extruded aluminum pieces, when combined produce superior cornering traction and unmatched lightweight handling. Class-Leading Suspension Industry-leading, fully adjustable KYB® spring-type fork with speed sensitive damping provides exceptional balance between handling and bump absorption, for race-winning handling performance. The linkage type rear suspension features a KYB® shock with ideal damping characteristics to match the compact chassis.