YEC ’04 YZF-R1 User Manual

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7. Flat Valve Set (5VY-A2100-70)
Parts List
These valves are used to improve the compression ratio (about 0.2) by making their
shape on the compression chamber side flatter than in the case of standard valves.
They are made of steel and have the same weight as the standard ones.
Standard parts are the following:
Parts List
No. PART No. PART NAME Q’TY REMARKS
1 5VY-12111-70 VALVE, INTAKE 4 Centre of intake (L=87.16)
2 5VY-12112-70 VALVE, INTAKE 2 8 Side of intake (L=88.34)
3 5VY-12121-70 VALVE, EXT. 8
No. PART No. PART NAME Q’TY REMARKS
1 5VY-12111-00
VALVE, INTAKE
4
2 5VY-12112-00
VALVE, INTAKE
8
3 5VY-12121-00
VALVE, EXHAUST
8
4 5NL-12116-00
SEAT, VALVE SPRING
12
5 3GM-12126-00
SEAT, VALVE SPRING 2
8
6 5VY-12113-00
SPRING, VALVE INNER
12
7 5VY-12114-00
SPRING, VALVE OUTER
8
8 5VY-12117-00
RETAINER, VALVE SPRING
12
9 5VY-12127-00
RETAINER, VALVE SPRING
8
10 1HX-12118-00
COTTER, VALVE
24
11 1WG-12118-00
COTTER, VALVE
16
12 4TV-12119-00
SEAL, VALVE STEM
12
13 4SV-12119-00
SEAL, VALVE STEM
8
14 1HX-12168- 
PAD, ADJUSTING 2
20
15 3LN-12153- 
LIFTER, VALVE
12
16 3FV-12153- 
LIFTER, VALVE
8

YEC ’04 YZF-R1 Specifications

General

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