2026 KPMI Full Catalog V1 - Flipbook - Page 122
HONDA CRF 250R 2010-2015
®
™
HONDA
Cylinder Head Service Kit
KPMI P/N
Type
Max Valve Lift Installed Height Seat Pressure
Intake
30-33310
.385”
Exhaust
1.185”
4 In / Ex Titanium Retainers 4
Kit Includes
50#
Open Pressure
@ Lift
160#
.385”
In / Ex CrSi Valve Springs 4 In / Ex H. T. Steel Basewashers
2
In Std. Black Diamond™ Valves
2
Ex Std. Black Diamond™ Valves
2
In Std. C630 Valve Guides
2
Ex Std. C630 Valve Guides
4
Red Viton® Seals
1
Top End Gasket Kit
Components • Replacement • Cylinder Head Service Kit
Speci昀椀cation
KPMI P/N
Description
30-31450
30-31462
30-31466
30-31470
30-31480
Spring Kit
Intake, Standard Valve Guide
Valve Guide • C630 Bronze
Exhaust, Standard Valve Guide
30-33311
Gasket Kit
Valve Guide • C630 Bronze
Includes: Head Gasket 78mm (1), Base Gasket (1), Exhaust Gasket (1), Cam Chain Tensioner Gasket (1),
Water Outlet O-ring (1)
Includes: Ti Retainers, CrSi Valve Springs, H.T. Steel Basewashers, Red Viton® Seals
Intake, Standard Valve
Valve • Black Diamond™ • Black Nitroneg Stems
Exhaust, Standard Valve
Valve • Black Diamond™ • Black Nitroneg Stems
Valves • Black Diamond™ • Black Nitroneg Stems
Stem Diameter
Tulip
O. L.
Remarks
1.201"
0.1961"
20º
3.500"
Standard
0.984"
0.1760"
20º
3.310"
Standard
KPMI P/N
Type
Head Diameter
30-31462
Intake
30.50mm
30-31466
Exhaust
25.00mm
Valves • O.E.M. Replacement • Titanium • Stainless
KPMI P/N
Type
Head Diameter
Stem
Diameter Tulip
O. L.
Material
Rep. OEM P/N
30-31462T
Intake
30.50mm
1.221"
0.1960"
20º
3.500"
Titanium
14711-KRN-A40
30-31466
Exhaust 25.00mm
0.984"
0.1760"
20º
3.310"
Stainless
14721-KRN-A40
Note: These valves are intended as O.E.M. replacement valves and are completely compatible with the O.E.M. spring kits. However, experienced engine
builders, who are running aggressive camshafts or higher than factory RPM’s may find the combination of the O.E.M. Style Valve and KPMI’s Lightweight Racing
Spring Kits advisable. All titanium valves are (Tensilite®) PVD CrN coated, and all stainless valves are Black Diamond™ coated.
Valve Guides • C630 Bronze
A
B
C
D
E
F
G
Intake
0.610"
0.610"
0.745”
0.965"
0.394"
0.1961'
0.3965" / Std.
30-31470
+0.001”
30-31471
+0.002”
30-31472
+0.010”
30-31479
0.820"
104
order 650-557-2046
0.820"
0.650”
0.770"
0.394"
0.1760" 0.3965" / Std.
Exhaust
30-31480
+0.001”
30-31481
+0.002”
30-31482
+0.010”
30-31489
