2026 KPMI Full Catalog V1 - Flipbook - Page 294
YAMAHA WR / YZ 250F 2001-2013
®
™
™
YAMAHA
Cylinder Head Service Kit
KPMI P/N
Type
Max Valve Lift Installed Height Seat Pressure
Intake
80-82400
.380”
Exhaust
3
Kit Includes
1.105”
Open Pressure
@ Lift
86#
.380”
39#
In Titanium Retainers 3
In CrSi Valve Springs
3 In H. T. Steel Basewashers
2 Ex Titanium Retainers 2
Ex CrSi Valve Springs
2 Ex H. T. Steel Basewashers
3
In Std. Black Diamond™ Valves
2
Ex Std. Black Diamond™ Valves
3
In Std. C674 Valves Guides
2
Ex Std. C674 Valve Guides
1
Top End Gasket Kit
Components • Replacement • Cylinder Head Service Kit
KPMI P/N
80-80066
80-80073
80-80075
80-80077
80-80080
80-80090
80-82401
Speci昀椀cation
Description
Spring Kit
Includes: Ti Retainers, CrSi Valve Springs, H.T. Steel Basewashers
Intake (Outer), Standard Valve
Valve • Black Diamond™ • Black Nitroneg Stems
Intake (Center), Standard Valve
Valve • Black Diamond™ • Black Nitroneg Stems
Exhaust, Standard Valve
Valve • Black Diamond™ • Black Nitroneg Stems
Intake, Standard Valve Guide
Valve Guide • C674 Bronze
Exhaust, Standard Valve Guide
Valve Guide • C674 Bronze
Gasket Kit
Includes: Head Gasket 77mm Bore (1), Base Gasket (1), Exhaust Gasket (1), Cam Chain Tens. Gasket (1),
Ex. Valve Stem Seal (2), In. Valve Stem Seal (3)
Valves • Black Diamond™ • Black Nitroneg Stems
Stem Diameter
Tulip
O. L.
Remarks
0.906"
0.1568"
25º
3.150"
Standard
23.00mm
0.906"
0.1568"
25º
3.095"
Standard
24.50mm
0.965"
0.1758"
25º
3.070”
Standard
KPMI P/N
Type
Head Diameter
80-80073
Intake
23.00mm
80-80075
Intake
(Center)
80-80077
Exhaust
Must use Kibblewhite® Lightweight Valve Spring Kits when installing Black Diamond™ Valves.
Valves • O.E.M. Replacement • Tensilite® • Chromium Nitride PVD Coated Titanium
KPMI P/N
Type
Head Diameter
Stem
Diameter Tulip
O. L.
Material
Rep. OEM P/N
80-80073T
Intake
23.00mm
0.906"
0.1570"
25º
3.150"
Titanium
5NL-12112-30-00
80-80075T
Intake
(Center)
23.00mm
0.906"
0.1570"
25º
3.090"
Titanium
5NL-12111-30-00
80-80077T Exhaust 24.50mm 0.965"
0.1758"
25º
3.070”
Titanium
5NL-12121-10-00
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 昀椀nd 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 • C674 Bronze
A
B
C
D
E
0.375”
.400"
0.520”
0.720”
.400"
F
G
0.1570” 0.3563” / Std.
+0.010”
0.405”
.430"
0.590”
0.790”
.440"
0.1760” 0.3958” / Std.
276
+0.010”
order 650-557-2046
Intake
Exhaust
80-80080
80-80089
80-80090
80-80099
