2026 KPMI Full Catalog V1 - Flipbook - Page 318
YAMAHA YZF R1 1998-2003
®
™
YAMAHA
Valve Spring Kit • Lightweight Racing
KPMI P/N
Type
Max Valve Lift Installed Height
Seat Pressure
Open Pressure
@ Lift
Intake
.380”
1.200"
28#
74#
.380”
Exhaust
.380”
1.120"
38#
84#
.380”
80-80250
12 In Titanium Retainers
20
CrSi Valve Springs
12 In H. T. Steel Basewashers
8
8
Ex Viton® Seals
8
Seat Pressure
Open Pressure
@ Lift
Kit Includes
Ex Titanium Retainers
Ex H. T. Steel Basewashers
Valve Spring Only Kit • High Performance
KPMI P/N
Type
Max Valve Lift Installed Height
Intake
.350”
1.370"
30#
90#
.350”
Exhaust
.315”
1.415"
44#
95#
.315”
80-80394
Kit Includes
12 In CrSi Valve Springs
8
Ex. CrSi Valve Springs 8
Ex H. T. Steel Basewashers
Valves • Black Diamond™ • Black Nitroneg Stems
Stem Diameter
Tulip
O. L.
Remarks
0.906"
0.1568"
15º
3.620"
Standard
23.00mm
0.906"
0.1568"
15º
3.565"
Standard (Center)
Intake
23.50mm
0.925"
0.1568"
15º
3.565"
Oversize (Center)
80-80286
Exhaust
24.50mm
0.965"
0.1757"
25º
3.505"
Standard
80-80287
Exhaust
25.00mm
0.984"
0.1757"
25º
3.505"
Oversize
KPMI P/N
Type
Head Diameter
80-80280
Intake
23.00mm
80-80283
Intake
80-80284
Valve Guides • C630 Bronze
A
B
C
D
E
F
G
Intake
0.580”
0.610"
0.520"
0.710"
0.381"
0.1568"
0.3563" / Std
80-80190
80-80191
80-80199
+0.001”
+0.010”
Exhaust
Intake - Use O.E.M valve guide seal
0.580”
0.610"
0.510"
0.690"
0.420"
80-80180
80-80181
80-80189
0.1757" 0.3955" / Std.
+0.001”
+0.010”
Valve Guide Seals • Viton® • Exhaust
Stem Diameter
4.5mm
O.L
0.331"
300
order 650-557-2046
Seal O.D.
0.370"
Seal Style
4
A
0.321”±0.005”
Designed for these guide specs
B
C
0.281"
0.120"
Type
D
0.240”
Exhaust
Part Number
Quantity
Quantity Discount
71014-4
71014-8
71014-16
71014-20
71014-50
71014-100
Pkg. of 4
0%
Pkg. of 8
0%
Pkg. of 16
Less- 10%
Pkg. of 20
Less- 10%
Pkg. of 50
Less- 15%
Pkg. of 100
Less- 20%
