2026 KPMI Full Catalog V1 - Flipbook - Page 319
YAMAHA YZF R1 2004-2006
®
™
YAMAHA
Valve Spring Kit • Lightweight Racing
KPMI P/N
Type
Max Valve Lift Installed Height
Seat Pressure
Open Pressure
@ Lift
48#
118#
.340”
Intake
80-80500
.340”
1.325"
Exhaust
12 In Titanium Retainers
20
CrSi Valve Springs
12 In H. T. Steel Basewashers
Kit Includes
8
Ex Titanium Retainers
8
Ex H. T. Steel Basewashers
YAMAHA YZF R1 2007-2008
®
™
Valve Spring Kit • Lightweight Racing
KPMI P/N
Type
Max Valve Lift Installed Height
Seat Pressure
Open Pressure
@ Lift
Intake
.400”
1.410"
50#
188#
.400”
Exhaust
.400”
1.280"
66#
167#
.400”
80-80650
8
Kit Includes
In Titanium Retainers
8
Ex Titanium Retainers
8
In CrSi Valve Springs
8
Ex CrSi Valve Springs
8
In H. T. Steel Basewashers
8
In H. T. Steel Basewashers
8
Ex H. T. Steel Basewashers
Valves • Black Diamond™ • Black Nitroneg Stems
Stem Diameter
Tulip
O. L.
Remarks
0.989"
0.1760"
15º
3.565"
Standard
1.024”
0.1760"
15º
3.565"
Oversize
Stem Diameter
Tulip
O. L.
Remarks
KPMI P/N
Type
Head Diameter
80-80666
Exhaust
25.00mm
80-80667
Exhaust
26.00mm
Must use Kibblewhite® Lightweight Valve Spring Kits when installing Black Diamond™ Valves.
Valves • Tensilite® • Chromium Nitride PVD Coated Titanium
KPMI P/N
Type
Head Diameter
80-80662T
Intake
31.00mm
1.220”
0.1960”
25º
3.590"
Standard
80-80663T
Intake
32.00mm
1.260”
0.1960”
25º
3.590"
Oversize
KPMI P/N
Style
Type
A
B
C
D
E
Quantity
Intake
0.177"
6.0°
0.186"
0.221”
0.212”
8 Pr.
80-80660
Single
Radius Bead
Exhaust
0.196"
6.5°
0.181"
0.216”
0.270”
8 Pr.
Keeper Set • O.E.M. Replacement
“B”
“C”
A
E
Note : The bead height is referenced from the minor diameter of the keeper to the center of the bead.
301
“D”
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