YEC ’04 YZF-R1 User Manual

- 5 -
5. High-lift Camshaft, Valve Spring
High-lift specification
When using these camshafts, the valve springs should also be those in the kit.
Specification
Valve spring set (5VY-A2111-70)
The standard valve timing is 105° for both intake and exhaust valves.
No. PART No. PART NAME Q’TY REMARKS
1 5VY-12171-70 SHAFT, CAM 1 1
2 5VY-12181-70 SHAFT, CAM 2 1
Nominal Working angle Major Axis
286-8.5 286 33.8
288-8.5 288 31.8
No. PART No. PART NAME Q’TY REMARKS
1 5VY-12113-70 SPRG., 1 12 For 5VY-12171-70
2 5VY-12114-70
SPRG., 2 8 For 5VY-12181-70
1
2
90105-07003
5VY-12176-00

YEC ’04 YZF-R1 Specifications

General

Brand	YEC
Model	’04 YZF-R1
Category	Motorcycle
Language	English