SCREAMIN' EAGLE FORGED HIGH-COMPRESSION PISTON KIT 4.155" X 4.5" (122CI)
941006142025-01-23
GENERAL INFORMATION
Table 1. General Information
Kits | Suggested Tools | Skill Level(1) |
|---|---|---|
21900130A | Safety glasses, Pencil or marker, Micrometer, Dial bore gauge, Small blade screwdriver |  |
(1) Tightening to torque value or other moderate tools and techniques required
KIT CONTENTS
Figure 1. Kit Contents: Screamin' Eagle Forged High-Compression Piston Kit 4.155" X 4.5" (122CI)
Table 2. Kit Contents: Screamin' Eagle Forged High-Compression Piston Kit 4.155" X 4.5" (122CI)
 | Verify that all contents are present in the kit before installing or removing items from vehicle. | ||||
|---|---|---|---|---|---|
Item | Qty | Description | Part No. | Notes | |
 | 1 | 2 | Piston | Not sold separately | |
| 2 | 2 | Piston pin | 22558-07 | |
| 3 | 4 | Circlip | 22097-99 | |
| 4 | 2 | Standard ring set | 22000105 | |
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
WARNINGRider 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 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.
PREPARE
NOTE
Disarm security system.
| 1. | Raise the vehicle. | |
| 2. | Remove seat. See service manual. | |
| 3. | Remove main fuse. See service manual. |
WARNINGTo prevent accidental vehicle start-up, which could cause death or serious injury, disconnect battery cables (negative (-) cable first) before proceeding. (00307a)
| 4. | Disconnect negative battery cable. See service manual. |
REMOVE
| 1. | Remove cylinder head, cylinder and piston. See service manual. | |
| 2. | Follow procedures in service manual for inspection pf parts. |
INSTALL
Measuring Pistons
| 1. | Allow piston to cool to room temperature. | |
| 2. | See Figure 2. With a pencil or marker, mark piston on each side of skirt across thrust faces (perpendicular to piston pin bore) 0.5 in. (12.7 mm) from bottom edge of chamfer on piston skirt. | |
| 3. | Using a micrometer at the parks, measure nominal diameter of piston. | |
| 4. | Use a dial bore gauge to measure piston ring travel zone in cylinder bore. |
Figure 2. 0.5 in. (12.7 mm)
Installing Pistons
NOTE
Pistons in this kit are not front and rear cylinder specific.
| 1. | Install pistons in front and rear cylinders with arrow pointing toward front of engine. |
NOTE
- Install rings with marking facing up. Rings with no markings can be installed wither side up.
- Always check piston-to-valve clearance with non-stock camshafts.
- For ring compression tool, see service tool instructions J06234.
Table 3. Piston Specifications
Piston | IN | MM | |
|---|---|---|---|
Fit in cylinder | 0.0017-0.0028 | 0.0440-0.0707 | |
Piston pin fit (loose) | 0.0060-0.0081 | 0.152-0.207 | |
Ring end gap | Top compression | 0.0150-0.0250 | 0.381-0.635 |
2nd compression | 0.0150-0.0250 | 0.381-0.635 | |
Oil control ring | 0.0098-0.0295 | 0.25-0.75 | |
Ring side clearance | Top compression | 0.0007-0.0027 | 0.019-0.069 |
2nd compression | 0.0009-0.0029 | 0.024-0.074 | |
Oil control rails | 0.0004-0.0059 | 0.01-0.15 | |
Table 4. Piston Service Wear Limits
Replace if Wear Exceeds | ||
|---|---|---|
Item | IN | MM |
Fit in cylinder (loose) | 0.0045 | 0.1143 |
Piston pin fit (loose) | 0.0015 | 0.0381 |
Top ring end gap | 0.031 | 0.79 |
2nd ring end gap | 0.032 | 0.81 |
Oil control ring rail gap | 0.031 | 0.79 |
Ring side clearance | 0.0035 | 0.089 |
2nd ring side clearance | 0.0037 | 0.094 |
Oil control ring side clearance | 0.0068 | 0.173 |
Piston Pin Circlip Installation
| 1. | See Figure 3. Insert open end of circlip (1) into notch (2) on groove (3). | |
| 2. | See Figure 4. Place thumb on piston (1). | |
| 3. | Press firmly until approximately 85% of circlip (2) is seated in groove. NOTE Make sure circlip is fully seated for proper installation. | |
| 4. | Use a small blade screwdriver to wedge circlip into remainder of groove. Do not scratch or mar piston. | |
| 5. | Repeat for remaining circlips. | |
| 6. | Install cylinder heads, cylinders and high compression pistons and rings from kit. See service manual. |
| 1 | Circlip |
| 2 | Notch |
| 3 | Groove |
Figure 3. Circlip and Piston
| 1 | Position of thumb on piston |
| 2 | Circlip 85% seated |
Figure 4. Install Circlip
COMPLETE
| 1. | Connect negative battery cable. See service manual. | |
| 2. | Install main fuse. See service manual. | |
| 3. | Install seat. After installing seat, pull up on seat to verify that it is secure. See service manual. | |
| 4. | Lower vehicle. | |
| 5. | Download the newElectronic Control Module (ECM) calibration using Screamin' Eagle Pro Street Performance Tuner kit. | |
| 6. | Run engine. Repeat several times to verify proper operation. |
BREAK-IN RIDING RULES
Refer to owner's manual to break in the vehicle.