Yamaha off-road motorcycle // sport atv gytr high compression piston kits
Engine / performance
For YFZ450X/YFZ450R ApplicationsFor Increase engine compression ratio to 13.2:1 (stock is
11.4:1). Offers 1.5 to 3 hp increase throughout most of
the power band. No crank rebalancing necessary. Piston
is forged aluminum with machined valve pockets for additional
valve clearance when higher lift camshafts are used.
Includes piston rings, piston pin, and clips (uses stock
replacements). Uses stock gaskets (not included). Requires
use of a minimum 100-octane racing fuel.For YFZ450 ApplicationsIncrease engine compression ratio to 13.0:1 (stock ’12~’13
is 11.4:1, ’06~’09 is 11.2:1, and ’04~’05 is 11.9:1). Offers
1.5 to 3 hp increase throughout most of the power band.
No crank rebalancing necessary. Piston is forged aluminum
with machined valve pockets for additional valve clearance
when higher lift camshafts are used. Includes piston rings,
piston pin, and clips (uses stock replacements). GYTR Top
End Gasket Kit (GYT-5TG04-10-00) required for installation.Note: All ’06 and later Sport ATV models are regulated by the EPA. Because this accessory affects emissions using it constitutes tampering punishable by law unless the vehicle
is only used in closed-course competition.
Note: This performance accessory does not meet California standards for off-road recreational vehicle usage regardless of model year.
Yamaha off-road motorcycle // sport atv gytr high compression piston kits
Yamaha off-road motorcycle // sport atv gytr high compression piston kits
