SE PRO TWIN CAM HURRICANE CNC OVAL PORTED CYLINDER HEAD KIT

J055142017-07-07

GENERAL

Kit Number

17799-11 (Black)

Models

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

NOTE

This engine-related performance part is intended for high-performance or racing applications. It is not legal for sale or use on pollution-controlled motor vehicles. This kit could reduce or void the limited vehicle warranty. Engine-related performance parts are intended FOR THE EXPERIENCED RIDER ONLY.

Installation Requirements

These cylinder heads must be used only with the Screamin' Eagle^® Pro Hurricane CNC Oval Port manifold kit (Part No. 27082-10).

These cylinder heads must be used with matching Screamin' Eagle pistons. Refer to the Screamin' Eagle Pro Racing Parts catalog or visit www.h-d.com/racecatalog for piston kit part numbers.

Each head requires one 12 mm spark plug. We recommend Screamin' Eagle Performance Spark Plugs.

A Top End Overhaul Gasket Kit (Part No. 17052-99C) and adjustable or Screamin' Eagle Adjustable Pushrods must be used.

These items are available separately from a Harley-Davidson dealer.

Separate purchase and installation of more parts or accessories could be required for proper installation of this kit on this model/year motorcycle. See the P&A retail catalog or the Parts and Accessories section of www.harley-davidson.com (English only) for a list of required parts or accessories for this model.

NOTE

Cylinder heads are painted before porting, and paint could remain in the ports. This condition does not affect air flow. It is not a defect.

NOTICE

You must recalibrate the ECM when installing this kit. Failure to properly recalibrate the ECM can result in severe engine damage. (00399b)

NOTE

ECM recalibration is required. See a Harley-Davidson dealer.

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)

NOTE

This instruction sheet refers to service manual information. A service manual for this year/model motorcycle is required for this installation. One is available from a Harley-Davidson dealer.

Kit Contents

See Figure 2 and Table 2.

PREPARATION

1.	Position the motorcycle on a suitable lift.
	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) WARNING To prevent spray of fuel, purge system of high-pressure fuel before supply line is disconnected. Gasoline is extremely flammable and highly explosive, which could result in death or serious injury. (00275a)
2.	See the service manual to perform the following steps: a. Remove seat. b. Purge and disconnect fuel supply line. c. Remove fuel supply line.

WARNING

To prevent accidental vehicle start-up, which could cause death or serious injury, remove main fuse before proceeding. (00251b)

NOTE

For 2007- later vehicles equipped with security siren: With security fob present, turn ignition switch ON. See the service manual. After system is disarmed, turn ignition switch OFF. IMMEDIATELY remove the main fuse.
For 2006 vehicles equipped with security siren: Disarm the siren with the key fob or security code. See the service manual to remove the main fuse.
For vehicles WITHOUT security siren: See the service manual. Remove main fuse.

ALL models:

See the service manual to perform the following steps:
1. Remove instrument console (if present) from fuel tank.
2. Remove fuel tank.
Raise the motorcycle.

ENGINE COMPONENT REMOVAL

1.	See the service manual to perform the following steps: a. Remove air cleaner assembly. b. Remove exhaust system. c. Remove cylinder heads from engine. NOTE Refer to the service manual for all removal/disassembly and assembly/installation procedures. IMPORTANT: Check valve-to-piston clearance as described in the following steps. We recommend that a Harley-Davidson dealer inspect the clearance. Valves must be properly adjusted to zero valve lash when claying pistons. Use adjustable pushrods and fully bottom the hydraulic lifters for accurate measurements.
2.	Apply a thick layer of clay to crowns of both pistons (in the areas where valves meet pistons). Depth: 3.2 mm (⅛ in)
3.	Install new cylinder heads from this kit, using new gaskets from the Top End Overhaul Gasket Kit (Part No. 17052-99B, purchased separately). Assemble heads and valve train. Tighten head bolts to torque specifications listed in service manual.
4.	Hand-rotate engine through two complete revolutions.

NOTE

Refer to Table 1 for the following measurements and specifications.

Clay must measure (item 1) at the thinnest point. If this measurement does not meet the minimum thickness, the depth of the valve notches must be increased. The depth of the notches must not exceed (item 2).
Since oversized valves are used, radial clearance must also be checked. A radial clearance of (item 3) is recommended.

NOTE

Refer to Table 1 for the following measurements and specifications. The valve springs on these cylinder heads have an installed spring height of (item 4a) which equals a seat pressure of (item 4b).

Increase seat pressure by placing shims (item 5a or 5b) under the lower spring collars. Every (item 6a) reduction in spring height equals (item 6b) more seat pressure. Shim to the desired seat pressure by placing shims under the lower collar. Maintain a minimum of (item 7) travel to coil bind.
Decrease seat pressure by machining the surface of the cylinder heads in the area under the valve spring lower collar. Every (item 6a) increase in spring height equals (item 6b) less seat pressure. Machine to the desired seat pressure by machining the spring pockets in the cylinder heads. Maintain a minimum of (item 7) travel to coil bind.

For constant operation at extreme RPMs, check all four valve springs for matching installed heights.

Table 1. Valve/Spring Specifications

Item	Description (Quantity)	Value
1	Minimum clay thickness (measured at thinnest point)	2.03 mm (0.080 in)
2	Valve notch depth (maximum)	3.43 mm (0.135 in)
3	Valve radial clearance	1.27 mm (0.050 in)
4a	Installed spring height	46.61 mm (1.835 in)
4b	Corresponding seat pressure	81.6 kg (180 lb)
5a	Shim (Part No. 18224-98), thickness	0.381 mm (0.015 in)
5b	Shim (Part No. 18225-98), thickness	0.762 mm (0.030 in)
6a	Change in spring height	0.381 mm (0.015 in)
6b	Corresponding change in seat pressure	3.4 kg (7.5 lb)
7	Minimum travel to coil bind	17.78 mm (0.70 in)

Remove heads. Measure the clay at its thinnest point.

1	Upper collar
2	Lower collar
3	1.835 in. (46.61 mm) installed spring height/180 lbs (81.6 kg) spring pressure
4	Free travel should be at least 0.080 in. (2.03 mm) greater than maximum valve lift.

Figure 1. Valve Spring Travel

6.	To change installed valve spring height (seat pressure): a. Compress each valve spring in turn. Remove valve collar retainers, upper collars, springs, valve seals and lower collars on all four valves. b. See Figure 1. Use shims or machine cylinder heads as required to obtain desired seat pressure (see preceding bullet points). Install lower valve spring collars and valve springs (do not install valve seals now), upper collars and collar keys. Check installed spring heights. c. If spring heights do not match, repeat Steps a and b as necessary to reach the desired installed spring height (without valve seals installed). d. When all spring heights match, remove valve collar retainers, upper collars, springs and lower collars. Install using new valve seals (Part No. 18067-09, purchased separately). Assemble the cylinder heads. e. Because of the large diameter of the springs in this kit, there could be slight interference between the spring and the rocker box. If interference is detected, rocker box bolt clearance could allow enough movement to avoid interference. If clearance is insufficient, remove a small amount of material from the rocker box.
7.	Install the new cylinder head assemblies.
8.	Check assembled engine for proper installation and operation.

NOTE

The automatic compression release plug can be removed for installation of a Screamin' Eagle Automatic Compression Release Kit (Part No. 28861-07A, available separately).
If mechanical compression release is desired, a Screamin' Eagle Compression Release Kit (Part No. 32076-04) is available. The mechanical compression release can be machined using the Screamin' Eagle Mechanical Compression Release Fixture (Part No. 94638-08).

ENGINE COMPONENT INSTALLATION

See the service manual to perform the following steps:
1. Install cylinder heads to engine.
2. Install exhaust system.
3. Install air cleaner assembly.
4. Install fuel tank.

COMPLETION

NOTE

To prevent possible damage to the sound system, verify that the ignition switch is in OFF position before installing the main fuse.

1.	See the service manual. Install main fuse.
	WARNING After installing seat, pull upward on seat to be sure it is locked in position. While riding, a loose seat can shift causing loss of control, which could result in death or serious injury. (00070b)
2.	See the service manual. Install seat.
	NOTICE You must recalibrate the ECM when installing this kit. Failure to properly recalibrate the ECM can result in severe engine damage. (00399b)
3.	Download the new ECM calibration using EFI Super Tuner Kit. Refer to the Screamin' Eagle Pro Racing Parts catalog or contact a Harley-Davidson dealer.
4.	Start and run engine. Repeat several times to verify proper operation.

OPERATION

Refer to BREAK-IN RIDING RULES in the owner's manual for engine break-in instructions.

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

The valve springs in these cylinder head assemblies work at up to 7,000 rpm, with cams with a maximum lift of:

16.764 mm (0.660 in)

NOTE

Due to the increased compression ratio, gasoline with a rating of at least 91 Octane must be used. The Octane Rating is normally displayed on the gas pump.

SERVICE PARTS

Figure 2. Service Parts: SE Pro Twin Cam Hurricane CNC Oval Ported Cylinder Head Kit

SERVICE PARTS

Table 2. Service Parts

Kit	Item	Description (Quantity)	Part Number
Kit 17799-11 (Black)	1	Cylinder head assembly, rear (includes Items 2-13) Cylinder head assembly, front (includes Items 2-13)	17798-11 17797-11
	2	Cylinder head (machined, with items B, C, D and E installed)	Not sold separately
	3	Collar, valve spring upper (4).	18213-10
	4	Collar, valve spring, lower (4). Included with Item "A".	Not sold separately
	5	Stud, exhaust port (4)	16715-83
	6	Intake valve (2)	18198-10
	7	Exhaust valve (2)	18199-10
	8	Seal, valve (4)	18067-09
	9	Valve spring unit (4). Included with Item "A".	Not sold separately
	10	Retainer, valve collar (8). Also included with Item "A".	18240-98
	11	Plug, automatic compression release (2)	16648-08A
	12	Medallion, "Hurricane 120RX" (2)	14100113A
	13	Screw, button head, TORX (4)	25800017
Service Kit:
	A	Valve Spring Kit, Screamin' Eagle (includes Items 4, 9, 10)	18281-02A
The following Screamin' Eagle parts are available separately:
	B	Valve seat, intake (not profiled, and 45 degree seats. Seat must be profiled and 50 degree seat machined by customer.)	18191-08
	C	Valve seat, exhaust (not profiled, and 45 degree seats. Seat must be profiled and 50 degree seat machined by customer.)	18048-98A
	D	Valve guide, intake (for service)
		(+ 0.003 in)	18158-05
		(+ 0.002 in)	18156-05
		(+ 0.001 in)	18154-05
	E	Valve guide, exhaust (for service)
		(+ 0.003 in)	18157-05
		(+ 0.002 in)	18155-05
		(+ 0.001 in)	18153-05