2026 KPMI Full Catalog V1 - Flipbook - Page 149
HONDA CRF 450R/RX/WE 2017-2026
®
™
A
0.535"
B
0.535”
C
0.590”
D
0.670"
E
0.433"
0.630"
0.630”
0.730”
0.870"
0.433"
F
G
0.1960" 0.4360" / Std.
+0.001”
+0.002”
+0.010”
0.1955" 0.4360" / Std.
+0.001”
+0.002”
+0.010”
Intake
Exhaust
30-32820
30-32821
30-32822
30-32829
HONDA
Valve Guides • C630 Bronze for CRF™ 450R/ RX/ WE 2017-2020
30-32830
30-32831
30-32832
30-32839
Valve Guide Seals • Viton®
Stem Diameter
5.0mm
O.L
0.350"
Seal O.D.
Seal Style
0.405"
A
0.340”±0.005”
Part Number
4
71015-4
71015-8
71015-16
71015-50
71015-100
Designed for these guide specs
B
C
D
0.303”
0.125”
0.230”
Quantity
Pkg. of 4
Pkg. of 8
Pkg. of 16
Pkg. of 50
Pkg. of 100
Type
Intake
Exhaust
Quantity Discount
0%
0%
Less- 10%
Less- 15%
Less- 20%
HONDA CRF 450X 2005-2017
®
™
Valve Spring Kit • Lightweight Racing
KPMI P/N
30-31050
Type
Max Valve Lift
Installed Height
Intake
.440"
1.215"
40#
147#
.440"
Exhaust
.440"
1.365"
70#
203#
.440"
Kit Includes
2
In, CrSi Valve Springs
Seat Pressure Open Pressure
@ Lift
2
In, Titanium Retainers
2 In, H. T. Steel Basewashers
2 *Ex, CrSi Valve Springs 2
Ex, Titanium Retainers
2 Ex, H. T. Steel Basewashers
Intake Only • Steel Valve Conversion Kit
KPMI P/N
Type
Max Valve Lift
Installed Height
30-31230
Intake
.440"
1.215"
Kit Includes
Seat Pressure Open Pressure
40#
147#
@ Lift
.440"
2
CrSi Valve Springs
2
Titanium Retainers
2
Black Diamond™ Valves
2
H. T. Steel Basewashers
Top End Service Kit
Max
Installed
Seat
Open
@ Lift
Valve Lift
Height
Pressure
Pressure
Intake
.440”
1.215"
40#
147#
.440”
30-32900 96.00mm
Exhaust
.440”
1.365"
70#
203#
.440”
2 In Titanium Retainers 2 In CrSi Valve Springs 2 In H. T. Steel Basewashers
2 Ex Titanium Retainers 2 *Ex CrSi Valve Springs 2 Ex H. T. Steel Basewashers
Kit Includes
2
In Black Diamond™ Valves
2
Ex Black Diamond™ Valves
1
High Performance Piston Kit
1
Top End Gasket Kit
IMPORTANT NOTE: The piston assembly (piston, rings, pin and pin clips) in this kit are designed to work together as a system. When used complete, the piston
assembly can be used as an OEM replacement. The individual components are NOT INTERCHANGEABLE with O.E.M. piston assembly components.
Piston
Bore Size
Type
*The Exhaust springs for this kit include a progressively wound Inner Spring, which should be installed with the tightly wound end seated on the H. T. Steel
Basewashers.
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131
KPMI P/N
