Cylinder Head Overview - Yamaha XP500 TMax Technical Manual

CYLINDER HEAD
n 4 valves per cylinder, DOHC
n Torsion type auto cam chain tensioner (similar to YZF-R1)
n "Shim-under-bucket" valve adjustment for long maintenance interval (same as YZF-R1/YZF-R6)
n Valve clearance at cold engine condition:
Intake : 0.15 - 0.20 mm
Exhaust: 0.25 - 0.30 mm
 Intake camshaft
‚ Cam chain tensioner
ƒ Exhaust camshaft
„ Silent cam chain
Exhaust
port
(2)
(3)
(1)
XP500 TMax Technical Orientation Guide
1
3
Intake
port
Intake valve Exhaust valve
(mm) (mm)
(1) 25.0 22.0
(2) 4.0 4.0
(3) 83.3 82.8
2
4
Air Induction
Ports
105º
EX
VALVE TIMING
3
TDC
25º
25º
105º
OL 50º
IN
55º 55º
BDC