Genesis 998 Turbo 4-stroke
The base of the Genesis 998T is the over-achieving Genesis® triple. Already renowned for pulling consistently hard from takeoff to top end, the factory-installed Turbo takes it to next level status while maintaining Yamaha's reputation for quality, durability and reliability.
High Quality Turbo-Charger
The Nickel alloy turbine body is extremely strong and precise, able to withstand highly elevated temperatures. Supported by top grade, ceramic ball bearings, the Inconel turbine blade assembly is very light and strong
The Yamaha Mitsubishi Electronic Control Unit (ECU) uses a series of 9 sensors to gather running condition data and computes using its predetermined memory 'map'. It then adjusts ignition timing, fuel delivery, manifold air-pressure and turbo boost pressure to produce maximum performance - reliably.
Triple Throttle Body Induction
Each cylinder has its own throttle body located as close as possible to the intake valves. This unique design offers immediate throttle response when combined with the efficient turbo and air bypass system.
Unlike regular blow-off valves, the ABV redirects air pressure back into the intake side of the compressor to prevent surge and maintain impeller speed, always at the ready for the next acceleration.
Engine coolant is circulated through the turbocharger to control temperature. Upon engine shut down, the convection energy produced by super-heated coolant at the turbo keeps it circulating without the coolant pump in operation. This eliminates the need for an engine cool down cycle while maintaining high durability in the turbo components.
The effect of 4-stroke 'engine braking' when the throttle valves are closed has a significant impact on handling and ride character. Yamaha developed a special system which employs the ISC (idle speed control) circuit and ECU map using throttle valve movement and RPM information to reduce negative intake pressure during deceleration.
Coated Aluminum Cylinders
The lightweight aluminum block has ceramic composite plating applied directly to the cylinder wall to eliminate the need for a steel cylinder sleeve and in doing so ensures excellent abrasion resistance and cooling performance
A specialized press method manufacturing process is adopted (forging process without twisting of the metal) to provide the needed strength to the crankshaft assembly to withstand the additional stress produced within a 'boosted' engine.
High Strength Connecting Rods
Special, light weight, hardened steel connecting rod design has the optimum strength required to produce maximum power. New 'carburized' steel connecting rod uses nutted studs to join the close tolerance, machined faced, big-end. Special 'Defric' coating applied for cold start protection and to maximize reliability.
The forged aluminum pistons are formed without melting the original aluminum stock, so they retain the strength of the original solidification structure, which enables the design of a lighter piston. This lightweight piston contributes to better 'pick-up' or 'response' while also reducing vibration.
The new engine features a unique piston oil cooling system. Oil is sprayed directly at the underside of the pistons through special jets to help cool and lubricate them.
The Yamaha cam shaft is forged from a solid bar then machined to its final finish and a special heat treatment is applied. This produces a very lightweight and durable component capable of maintaining high RPMs.
The advantage of the reduction in vibration is realized in multiple benefits for both the vehicle and the operator adding greater running stability with less rider fatigue.
YSRC Roller Secondary Clutch
The new reverse cam secondary features roller cam followers to reduce friction and special hi efficiency casting designs to improve aerodynamic power loss and reduce temperature. Sheave casting strength is improved to handle the higher horsepower and drive ratio is increased for wider speed range allowing the use of lower final gears.
New 'YSRC' primary clutch is designed for high horsepower with greater Strength improved efficiency and enhanced cooling ability.
Yamaha's advanced fuel injection system controls fuel flow to the engine for spot-on performance and throttle response.
Multi-purpose magnesium chaincase
The Sidewinder chain case and cover serve as both a mounting point for chassis spars and the engine's oil reservoir. Lightweight magnesium construction minimizes weight.
High performance Hayes Brake system
The Sidewinder's high performance Hayes brake system delivers stopping power with a large-diameter, 8-inch rotor. Mounted low on the drive shaft, you feel immediate whoa-power with a quick stab of the brake. The hydraulic brake's race-inspired radial master cylinder design gives you excellent leverage when needed, with precise brake feel and control.
15 x 137 x 1.25-inch Camoplast® Rip Saw? II track
The Sidewinder L-TX LE uses the extraordinary Camoplast® Ripsaw II? track, measuring 15 by 137 inches, with 1.25-inch lugs. This evolutionary lightweight track design is the next stage of close collaboration between Yamaha and Camoplast. It features a durable single-ply design with next-generation lug pattern. The Ripsaw II has been designed to offer increased controlled lateral slide, allowing the Sidewinder to set up for the corner better while scrubbing off energy to keep both skis on the ground. The result is improved handling without the loss of straight line traction.