SCREAMIN' EAGLE MKE8 EXTREME PORTED CYLINDER HEADS

941006652025-01-23

GENERAL INFORMATION

Table 1. General Information

Kits	Suggested Tools	Skill Level⁽¹⁾
16501332, 16501333	Safety Glasses, Torque Wrench

(1) Tightening to torque value or other moderate tools and techniques required

KIT CONTENTS

Figure 1. Kit Contents: Screamin' Eagle Ported Cylinder Head

Table 2. Kit Contents: Screamin' Eagle Ported Cylinder Head Kit

Verify that all contents are present in the kit before installing or removing items from vehicle.
Kit	Item	Qty	Description	Part No.	Notes
16501332 (black)	1	1	Cylinder head assembly, front	16501328
16501332 (black)	1	1	Cylinder head assembly, rear	16501318
16501333 (black granite)	1	1	Cylinder head assembly, front	16501329
16501333 (black granite)	1	1	Cylinder head assembly, rear	16501319
	2	16	Keepers, valve spring	18100060
	3	8	Collar, valve spring	18100045
	4	8	Valve spring	Not sold separately
	5	8	Valve guide seal	18100044
	6	4	Head fitting	62800067
	7	4	Intake valve	18000056
	8	4	Exhaust valve	18000057
	9	4	Stud, exhaust port	10900015
	10	1	Medallion assembly, Stage IV, front	14101308
	10	1	Medallion assembly, Screamin' Eagle, rear	14101396
	11	4	Screw, medallion (not shown)	68120-00

GENERAL

Instruction sheet is also available electronically. To verify you are using the most current version available, do one of the following:

Go to h-d.com/isheets
Scan QR code in upper left corner of the instruction sheet

NOTE

This instruction sheet may have a Supplemental Video to assist installer in clarifying a certain part of the assembly. A linked video would be located at the end of this instruction sheet.

Models

For model fitment information, see the Parts and Accessories (P&A) Retail Catalog or the Parts and Accessories section of www.harley-davidson.com.

Contact Harley-Davidson Customer Support Center at 1-800-258-2464 (U.S. only) or 1-414-343-4056.

Installation Requirements

WARNING

Rider and passenger safety depend upon the correct installation of this kit. Use the appropriate service manual procedures. If the procedure is not within your capabilities or you do not have the correct tools, have a Harley-Davidson dealer perform the installation. Improper installation of this kit could result in death or serious injury. (00333b)

NOTICE

Do not exceed the maximum safe RPM specified below under any conditions. Exceeding the maximum safe engine RPM can result in equipment damage. (00248a)

NOTE

This instruction sheet references service manual information. A service manual for the year and model motorcycle is required for this installation and is available from:

A Harley-Davidson dealer.
H-D Service Information Portal, a subscription-based access available for most 2001 and newer models. For more information see Frequently ask questions about subscriptions.

NOTE

The valve springs in these cylinder head assemblies work with cams with up to 0.540 in (13.75 mm) lift, and up to 6800 rpm.
This product may be intended for race use only applications. It may also be certified for use in a 50-state U.S. EPA compliant application or kit. Use of any incomplete combination of certified kit products may not be legal for sale or use on U.S. market pollution controlled vehicles and may be restricted to closed course competition use. See Genuine Motor Parts & Accessories or Screamin' Eagle Accessories catalog for compliance, fitment and warranty information. Screamin' Eagle Performance products are intended for the experienced rider only.
Installation of this product may reduce or void Harley-Davidson warranty. Installation of non-certified or non-Harley-Davidson performance products will void your powertrain warranty. Installation of this component as part of a certified 50-state U.S. EPA compliant application will not reduce or void your warranty in the U.S.

These are items are available at your local Harley-Davidson dealership:

Separate purchase of four Screamin Eagle Performance Spark Plugs (Part No. 31600085) are recommended.
Separate purchase of Top End Overhaul Gasket kit (Part No. 25700983A) is required.
Separate purchase of Screamin Eagle Milwaukee-Eight Cylinder Head Bolt kit (Part No. 10400069) is required.

PREPARE

WARNING

When servicing the fuel system, do not smoke or allow open flame or sparks in the vicinity. Gasoline is extremely flammable and highly explosive, which could result in death or serious injury. (00330a)

NOTE

If vehicle is equipped with Harley-Davidson Smart Security System, see owner's manual for instructions to disarm the system.

1.	Remove seat. See service manual.
2.	Remove main fuse. See service manual.
3.	Remove fuel tank. See service manual.
4.	Remove air cleaner assembly. See service manual.
5.	Remove induction module. See service manual.
6.	Remove exhaust system. See service manual.

REMOVE

Remove cylinder heads from engine. See service manual.

INSTALL

Install Cylinder Heads

NOTE

It is important to check valve-to-piston clearance. Harley-Davidson recommends that this inspection be performed by a Harley-Davidson dealer.
Valves must be adjusted to zero valve lash when checking clearance.

1.	Check valve-to-piston clearance. a. Apply a 1/8 in (3.2 mm) thick layer of clay to crowns of both pistons in areas where valves meet pistons. b. Install new cylinder heads from this kit per service manual procedures, using Original Equipment (OE) head gaskets and cylinder head flange nuts. c. Tighten cylinder head flange nuts to torque specifications listed in steps d-h. d. Apply new engine oil underneath flange of head bolt. Tighten. Torque: 27.1–40.6 N·m (20–30 ft-lbs) e. Loosen one turn -360 degrees. f. Tighten nut. Torque: 12.2–14.9 N·m (9–11 ft-lbs) g. Tighten nut again. Torque: 24.2–27.1 N·m (18–20 ft-lbs) h. Final torque. Tighten additional degree value of 90 degrees. i. Assemble heads and valve train. j. Turn engine (by hand) through two complete revolutions. k. Remove heads and measure clay at its thinnest point. Clay must measure 0.060 in (1.52 mm) or more at thinnest point. If this measurement does not meet minimum thickness, depth of valve notches must be increased, however, depth of notches must not exceed 0.135 in (3.43 mm).
2.	Change installed valve spring height, seat pressure, if needed. NOTE The valve springs on the new cylinder heads have an installed spring height of 1.535 in (38.99 mm), which equals 68.8 lbs (31.21 kg) of seat pressure. a. Compress valve springs and remove valve keepers, upper collars, springs, and valve stem seals on all four valves of each cylinder. b. Use shims or machine the cylinder heads as required to obtain desired seat pressure, see not above. Assembly valve components. Check installed spring height. c. Repeat steps as necessary to reach desired installed spring height. d. When all spring heights match, install valves using new valve guide seals (Part no. 18100044), purchased separately.

1	Collar
2	Free travel 0.060 in. (1.52 mm) greater than valve lift.
3	Valve stem seal
4	Installed spring height 1.535 in. @ 68.8 lbs (38.99 mm @ 31.21 kg)

Figure 2. Valve Spring Travel

Install Engine Components

1.	Transfer automatic compression release valves from stock heads to heads supplied in kit. Refer to appropriate ELECTRICAL section in service manual.
2.	Install cylinder heads and valve train to engine using new head gaskets from Top End Overhaul Gasket Kit and new cylinder head flange nuts (both purchased separately). Refer to appropriate ENGINE section in service manual. a. Use torquing sequence outlined in this instruction. See steps 1d-1h in Install Cylinder Heads.

COMPLETE

1.	Install exhaust system. See service manual.
2.	Install induction module. See service manual.
3.	Install air cleaner assembly. See service manual.
4.	Install fuel tank. See service manual.
5.	Install main fuse. See service manual.
6.	Install seat. After installing seat, pull up on seat to verify that it is secure. See service manual.

OPERATION

Start and run engine. Repeat several times to verify proper operation. Refer to BREAK-IN RIDING RULES in the owner's manual for instructions to break-in vehicle.