2026 KPMI Full Catalog V1 - Flipbook - Page 104
HD M8 (& CVO’s) 2017-2025
®
™
HARLEY-DAVIDSON
2023-2025 CVO’s check valve lift to determine compatibility with KPMI spring kits
Valve Spring Kit • Rocker Shim Conversion System • Dual Spring
KPMI P/N
Type
Intake
20-23400
Exhaust
Kit Includes
KPMI P/N
Type
Intake
20-23450
Exhaust
Kit Includes
Max Valve Lift
Installed Height
Seat Pressure
Open Pressure
.675” Max
.660”
.645”
.630”
.615”
1.600"
1.585"
1.570"
1.555"
1.540"
86#
91#
96#
101#
107#
317#
317#
317#
317#
317#
8
Titanium Retainers
8
CrSi Valve Springs
8
H. T. Steel Basewashers
8
*Red Viton® Seals
8
H. T. Steel Keeper (9º)
8
H. T. Steel Adj. Shim
Max Valve Lift
Installed Height
Seat Pressure
Open Pressure
.675” Max
.660”
.645”
.630”
.615”
1.600"
1.585"
1.570"
1.555"
1.540"
86#
91#
96#
101#
107#
317#
317#
317#
317#
317#
8
H. T. Steel Retainers
8
CrSi Valve Springs
8
H. T. Steel Basewashers
8
*Red Viton® Seals
8
H. T. Steel Keeper (9º)
8
H. T. Steel Adj. Shim
IMPORTANT NOTES:
Modi昀椀cation Necessary: To maximize shim contact in the retainer, KPMI recommends “tipping” (shortening the valve tip). See KPMI® installation instructions for more info.
Stem Protrusion: There is anticipated to be a rough 0.100” increase in e昀昀ective stem protrusion with the use of the shim.
Valve Guide Compatibility: This system must be run with KPMI’s newer style M8 valve guides, which are shortened for 0.675” valve lift. See KPMI® installation instructions
for more info.
Valve Spring Kit • Rocker Shim Conversion System • Beehive Spring
KPMI P/N
Type
Max Valve Lift Installed Height
Seat Pressure Open Pressure
@ Lift
Intake
20-23900
Exhaust
Kit Includes
KPMI P/N
Type
.625”
1.500"
85#
280#
.625”
8
Titanium Retainers
8
CrSi Valve Springs
8
H. T. Steel Basewashers
8
*Red Viton® Seals
8
H. T. Steel Keeper (9º)
8
H. T. Steel Adj. Shim
Max Valve Lift Installed Height
Seat Pressure Open Pressure
@ Lift
Intake
20-23950
Exhaust
Kit Includes
.625”
1.500"
85#
280#
8
.625”
8
H. T. Steel Retainers
CrSi Valve Springs
8
H. T. Steel Basewashers
8
*Red Viton® Seals
8
H. T. Steel Keeper (9º)
8
H. T. Steel Adj. Shim
IMPORTANT NOTES:
Modi昀椀cation Necessary: To maximize shim contact in the retainer, KPMI recommends “tipping” (shortening the valve tip). See KPMI® installation instructions for more info.
Stem Protrusion: There is anticipated to be a rough 0.100” increase in e昀昀ective stem protrusion with the use of the shim.
86
*Note : KPMI® made OEM replacement seals are included for a more complete performance valvetrain solution.
**Note : These basewashers are designed to 昀椀t on top of either the OEM or KPMI® Tophat seals provided in this kit.
order 650-557-2046
