This complete flywheel assembly features an increase in inertia mass that smoothes the power delivery. Helps get power to the ground and keep your momentum up through corners and tricky sections. Easy to install, allowing you the opportunity to change flywheels for different types of riding.
NOTE: Flywheels are measured by inertia weights because the affect of the weight differs depending on where it is in relation to the center of the crank. A 4 oz. and 6 oz. weight might have the same affect depending on where they are positioned in relation to the center of the crank.
WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Maximize your top-end horsepower with this Performance Cam Kit. Ground to exact specifications using special CNC cam-grinding machines. Special billet alloy construction provides consistent machined surfaces for increased durability. Cams come with durable stock cam gears and de-comp installed, degreed-in, and ready to install. No costly core charges or deposits, or exchange programs that can add to downtime. Designed for use in modified engines equipped with a high compression piston.
This accessory is restricted to closed-course competition use. See California Regulations regarding Emission-Related Parts and Accessories for products for closed-course competition use only.
The GYTR® Ported Cylinder Head Assembly comes fully assembled and ready to install with no costly core charges, deposits or exchange programs that can add downtime. CNC milling helps eliminate the variances that hand porting can produce. The head was developed on the flow bench in conjunction with dyno and track testing to ensure the ultimate in performance and durability. GYTR Performance Camshaft Kit is included, as well as stock valve train and cam gears for durability and easy maintenance. GYTR Head Assemblies are used by Yamaha SX/ MX and ATV Race Teams.
Note: GYTR Air Boot (1SM-E41H0-V0-00) is recommended for the 2014-2018 YZ250F GYTR Ported Cylinder Head Kit.
The GYTR® 1SL (2014-2016 YZ450F) High Compression Piston Kit provides a performance boost throughout the RPM range while maintaining a high level of durability. Machined valve pockets provide additional valve clearance when used with higher lift camshafts. The kit includes piston rings, piston pin, and clips (uses stock replacements). Requires use of minimum 100-octane racing fuel.
IMPORTANT: GYTR Oil Sprayer is required for installation.
This oil sprayer is precision constructed out of CNC machined aluminum with a special 2-hole design. Other features include:
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