Race – Dual Spring Kit Titanium System, .675” Lift, HD®, M8 2017-2023 # 20-23400

$1,015.91

1 in stock (can be backordered)

 ### MODIFICATIONS REQUIRED SEE BELOW ###

  • MILWAULKEE 8
  • DUAL SPRING KIT
  • VALVE SPRINGS (8)
  • TI-REATINERS (8)
  • VALVE STEM SEALS (8)
  • SPRING SEATS (8)
  • PART # 20-23400

1 in stock (can be backordered)

Frequently Bought Together

Valve, White Diamond®, +1.00mm O/S IN, HD®, Milwaukee 8 2017-2021

 

  • HEAD DIA 41mm +1mm O/S
  • OVL 102.1mm
  • TRIPLE GROOVE
  • HI-FLOW

Valve, White Diamond® Inconel, +1.0mm O/S EX, Harley-Davidson®, Milwaukee-Eight, 2017-'20 - 20-21062K

 

  • HEAD DIA 33mm +1mm O/S
  • OVL 103mm
  • TRIPLE GROOVE
  • HI-FLOW
  • INCONEL

Valve, White Diamond®, +2.00mm O/S INTAKE, HD®, Milwaukee 8 2017-2021

 

  • HEAD DIA 42mm +2mm O/S
  • OVL 102.1mm
  • TRIPLE GROOVE
  • HI-FLOW

Valve, White Diamond® Inconel, +2.0mm O/S EX, Harley-Davidson®, Milwaukee-Eight, 2017-'20 # 20-21063K

  • HEAD DIA 34mm +2mm O/S
  • OVL 103mm
  • TRIPLE GROOVE
  • HI-FLOW
  • INCONEL
  • 20-21063K

Guide, Mng. Brz., INTAKE +0.001, HD®, Milwaukee 8 2017-2021

MILWAUKEE 8

  • Intake Guide +.001"
  • Manganese Bronze

 

Guide, Mng. Brz., EXHAUST +0.001, HD®, Milwaukee 8 2017-2021 # 20-21031M

MILWAUKEE 8

  • EXHAUST Guide +.001"
  • Manganese Bronze

 

MILWAUKEE 8 ROCKER STUD KIT # 20-21045

ROCKER STUD KIT

PART # 20-21045

RAMS # RSK-HD-M8

Cylinder Studs, HT Steel, Std. Length, HD®, Milwaukee 8 2017-2021 ( P# 20-21040 )

CYLINDER STUD KIT

PART # 20-21040

 

MILWAUKEE 8 Cylinder Dowel, Steel, 0.375" OD (Pkg. of 4)

MILWAUKEE 8

PART # 83250-4

CYLINDER DOWELS

Description

###  WARNING MODIFICATIONS REQUIRED  ###

he KPMI® Rocker Shim Conversion Spring Kit for the Milwaukee-8 utilizes a dual spring system and a lightweight retainer that houses a standard Ø9.5mm hardened steel shim. The rocker arm rides directly on the shim surface and the 9.5mm diameter significantly increases the allowable rocker wipe area. This increase in wipe area provides the ability to utilize larger lift cams, that previously were unable to run on a 6mm valve stem.
The system is intended to be adjustable and allows for at least 0.060” of spring shims, tailoring the pressures and lift capacity to meet the engine builder’s needs. Additionally, the rocker shim thickness can be varied to adjust effective stem protrusion.
When larger camshafts are used, and valvetrain acceleration values increase, KPMI® strongly recommends running titanium valves for maximum performance.

IMPORTANT NOTE:
Modification 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 effective 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.

Installation Instructions Click Here
Type Intake / Exhaust
Retainer Material Titanium
0.675″ Lift Installed Height- 1.600″ / Seat Pressure- 86#
0.660″ Lift Installed Height- 1.585″ / Seat Pressure- 91#
0.645″ Lift Installed Height- 1.570″ / Seat Pressure- 96#
0.630″ Lift Installed Height- 1.555″ / Seat Pressure- 101#
0.615″ Lift Installed Height- 1.540″ / Seat Pressure- 107#
Open Pressure 317#

 

Additional information

Weight 1 kg
Dimensions 14 × 11 × 6 cm

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