SCREAMIN' EAGLE 4.5 INCH STROKE BIG BORE 122 PISTON & SCREAMIN' EAGLE 4.375 INCH STROKE BIG BORE 119 PISTON KITS
941001132020-08-25
GENERAL INFORMATION
Table 1. General Information
Kits | Suggested Tools | Skill Level(1) | Time |
|---|---|---|---|
21900130 (122) 21900129 (119) | Safety glasses, pencil or marker, micrometer, dial bore gauge, small blade screwdriver |  | 1 hour |
(1) Special tools or techniques required for installation
KIT CONTENTS
Figure 1. Service parts: Screamin' Eagle Big Bore 119/122 Piston Kits
Table 2. Kit Contents: Screamin' Eagle 4.375 Inch Stroke Big Bore 119 Piston Kit Components (Kit 21900129)
 | Item | Qty | Description | Part No. | Notes |
|---|---|---|---|---|---|
 | 1 | 2 | Piston | Not sold separately | |
| 2 | 2 | Piston pin | 22558-07 | |
| 3 | 4 | Cir-clip | 22097-99 | |
| 4 | 2 | Ring set | 22000105 |
Table 3. Kit Contents: Screamin' Eagle 4.5 Inch Stroke Big Bore 122 Piston Kit Components (Kit 21900130)
| 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 |
NOTE
Verify all contents are present in the kit before installing or removing items from vehicle.
GENERAL
Models
For model fitment information, see the P&A Retail Catalog or the Parts and Accessories section of www.harley-davidson.com (English only).
Verify that the most current version of the instruction sheet is used. It is available at: www.harley-davidson.com/isheets
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)
INSTALL
NOTE
Disarm security system.
| 1. | Raise the motorcycle. | |
| 2. | Remove seat according to the instructions in the service manual. | |
| 3. | Remove main fuse. | |
| WARNING To 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. | |
| 5. | Remove cylinder head, cylinder, and piston. See service manual. | |
| 6. | Follow the procedures in the service manual for inspection of parts. |
Figure 2. 0.5 in. (12.7 mm)
Measuring Pistons
| 1. | Allow the piston to cool to room temperature. | |
| 2. | With a pencil or marker, mark the piston on each side of the skirt across the thrust faces (perpendicular to the piston pin bore) 0.5 in (12.7 mm) from the bottom edge of the chamfer on the piston skirt. | |
| 3. | Using a micrometer at the parks, measure the nominal diameter of the piston. | |
| 4. | Use a dial bore gauge to measure the piston ring travel zone in the cylinder bore. |
Installing Pistons
| 1. | The pistons in this kit are not front and rear cylinder specific. Install the pistons in the front and rear cylinders with the arrow pointing toward the front of the engine. |
NOTE
Install rings with marking facing up. Rings with no markings can be installed either side up.
Always check piston-to-valve clearance with non-stock camshafts.
For ring compression tool, see Service Tool Instructions J06234.
Table 4. 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 5. 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 the open end of circlip (1) into notch (2) on groove (3). | |||||||||||
| 2. | See Figure 4. Place thumb on piston (1). Press firmly until approximately 85% of circlip (2) is seated in groove. NOTE Make sure that the circlip is fully seated for proper installation. | 
Figure 3. Circlip and piston 
Figure 4. Install circlip | ||||||||||
| 3. | Use a small blade screwdriver to wedge circlip into remainder of groove. Do not scratch or mar piston. Repeat for remaining circlips. | |||||||||||
| 4. | Install cylinder heads, cylinders, and high compression pistons and rings from kit. See service manual. |
FINAL ASSEMBLY
| 1. | Install fuel tank. See service manual. | |
| 2. | Install main fuse. See service manual. | |
| 3. | Install seat. After installing seat, pull up on the seat to verify that it is secure. See service manual. | |
| 4. | Download the new ECM calibration using Screamin' Eagle Pro Street Performance Tuner Kit. | |
| 5. | Run engine. Repeat several times to verify proper operation. |
BREAK-IN RIDING RULES
Refer to the Owner's Manual to break in the motorcycle.