2026 KPMI Full Catalog V1 - Flipbook - Page 297
YAMAHA YZ 250F 2014-'18 / WR 250F & YZ 250FX 2014-'19
®
™
™
™
YAMAHA
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
80-80912T
Intake
31.00mm
1.220"
0.1962"
18º
3.280"
Titanium
1SM-12111-10-00
80-80916T
Exhaust 25.00mm
0.984"
0.1760'
30º
3.235"
Titanium
1SM-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.
Valves • Black Diamond™ • Black Nitroneg Stems
KPMI P/N
Type
Intake
Exhaust
80-80912
80-80916
Head Diameter
31.00mm
1.220"
25.00mm
0.984"
Stem Diameter
0.1962"
0.1760"
Tulip
18º
30º
O. L.
3.265"
3.235”
Remarks
Standard
Standard
Must use KPMI® Spring Kit, #80-81400.
YAMAHA YZ 250F 2019-'26 / WR 250F & YZ 250FX 2020-'26
®
™
™
™
Valve Spring Kit • Lightweight Racing
KPMI P/N
Type
80-82300
Intake
Exhaust
Max Valve Lift Installed Height
.420”
.400”
Seat Pressure
Open Pressure
@ Lift
69#
52#
187#
149#
.420"
.400"
1.315”
1.160"
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
*The Intake springs for this kit include a progressively wound Outer Spring, which should be installed with the tightly wound end seated on the H. T. Steel
Basewashers.
Intake Only • Steel Valve Conversion Kit
KPMI P/N
Type
80-82350
Intake
**Max Valve Lift Installed Height
Seat Pressure Open Pressure
@ Lift
1.315”
69#
2
Intake Titanium Retainers
2
**Intake CrSi Valve Springs
2
Intake H. T. Steel Basewashers
2
Intake Black Diamond™ Valves
.420”
Kit Includes
187#
.420”
**The Intake springs for this kit include a progressively wound Outer Spring, which should be installed with the tightly wound end seated on the H. T. Steel
Basewashers.
Valves • Black Diamond™ • Black Nitroneg Stems
KPMI P/N
Type
Head Diameter
Stem Diameter
Tulip
O. L.
Remarks
80-82312
Intake
31.00mm
1.220"
0.1962"
18º
3.245"
Standard
80-82316
Exhaust
25.00mm
0.984"
0.1760"
30º
3.240”
Standard
Must use KPMI® Spring Kit, #80-82300.
KPMI P/N
Type
Head Diameter
Stem
Diameter Tulip
O. L.
Material
Rep. OEM P/N
80-82312T
Intake
31.00mm
1.220"
0.1962"
18º
3.250"
Titanium
B7B-12111-00-00
80-82316T
Exhaust 25.00mm
0.984"
0.1760"
30º
3.235”
Titanium
1SM-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.
279
Valves • O.E.M. Replacement • Tensilite® • Chromium Nitride PVD Coated Titanium
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