YAMAHA 06-09 YZ450F 09-11 YFZ450R DUNCAN RACING 480 BIG BORE CYLINDER HEAD CAMS

Condition: Used

This 480cc (98mm) big bore top end is in very good condition and shows normal signs of wear. Removed from a very strong running engine with no issues. Duncan Racing 289-X12 high performance camshafts, cylinder head is ported with shortened bronze guides and KPMI valves, springs and hardware. Cylinder Works 98mm cylinder and Vertex piston in great condition with minimal wear. Cylinder has no scoring or issues. All valve clearances are in spec and valves seal without issue. Intake valve shims are 1.40mm, 1.50mm, and 1.65mm. Exhaust shims are 1.40mm and 1.50mm. No scoring or excessive wear in cam journals and camshafts rotate smoothly. The only minor issue found is the exhaust valve bucket bores have been cleaned up and buckets have a small amount of play, there was no issues while running, but worth noting. Overall this kit is in excellent running shape and is very powerful and fast. Removed from an AMA flat track bike. Ready to install and run!

Brand: Yamaha

Manufacturer Part Number: 2S2-11102-00-00,2S2-11311-00-00,2S2-11311-11-00

Type: cylinder head & Valves

Vehicle Compatibility

Year	Make	Model	Submodel
2011	Yamaha	WR450F	--
2011	Yamaha	WR450F	Team Yamaha
2009	Yamaha	WR450F	--
2008	Yamaha	WR450F	--
2007	Yamaha	WR450F	--
2011	Yamaha	YFZ450R	--
2010	Yamaha	YFZ450R	--
2009	Yamaha	YFZ450R	--
2011	Yamaha	YFZ450RSE	Special Edition
2010	Yamaha	YFZ450RSE	Special Edition
2009	Yamaha	YFZ450RSE	Special Edition
2011	Yamaha	YFZ450X	--
2010	Yamaha	YFZ450X	--
2010	Yamaha	YFZ450X	Bill Balance Edition
2011	Yamaha	YFZ450XSE	Special Edition
2009	Yamaha	YZ450F	--
2008	Yamaha	YZ450F	--
2007	Yamaha	YZ450F	--
2006	Yamaha	YZ450F	--
2006	Yamaha	YZ450F	50th Anniversary

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