Yamaha off-road motorcycle // sport atv gytr ported cylinder head assembly
Engine / performance
Through extensive development, with flow bench, dyno,
and track testing, we achieved optimum power from our
GYTR ported cylinder head. Once we perfected the head
flow characteristics, we meticulously digitized the ports to
obtain the precise dimensions needed for CNC machining.
Unlike flow variations inherent in hand porting, CNC
porting lets us accurately reproduce this maximized flow
design with every cylinder head manufactured. Cylinder
head comes as a ready-to-install assembly, with valve train
and GYTR Performance Camshafts pre-assembled. Can
be used with stock or GYTR performance piston (GYT-
5D305-00-00), sold separately. Used by ITP® QuadCross®
Champion Dustin Nelson.
Fits ’10-’11 YFZ450X, ’09-’13 YFZ450R
Note: For maximum performance and protection, always use
Yamalube 15W-30 Full Synthetic Oil after installation – two quarts
are included with each GYTR Ported Cylinder Head Assembly.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 ported cylinder head assembly
Yamaha off-road motorcycle // sport atv gytr ported cylinder head assembly
