Screamin' Eagle Twin Cam 88 High Compression Piston Kit
J020912013-11-01
GENERAL
Kit Numbers
(1450) 22156-99A, 22161-99A and 22141-99A (1550) 22661-99A, 22174-99A, 22179-99A and 22147-99A
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 instruction sheet references Service Manual information. A Service Manual for your model motorcycle is required for this installation and is available from a Harley-Davidson Dealer.
NOTE
Top End Service Gasket Kit P/N 17052-99, required for assembly, must be purchased separately. 1550 Kits require separate purchase of two head gaskets, Part No. 16787-99.
If Screamin' Eagle Intake Manifold or Carburetor are installed, replace one-piece manifold seals with new manifold seals (P/N 26995-86B) and flanges Front (P/N 27009-86A), Rear (P/N 27010-86A.)
For optimal performance, exhaust seals should be replaced with seals (P/N 17048-98.)
Kit Contents
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 engine related performance part is intended for High Performance or Racing applications and is not legal for sale or use on pollution controlled motor vehicles. This kit may reduce or void the limited vehicle warranty. Engine related performance parts are intended for the experienced rider only.
WARNINGTo prevent accidental vehicle start-up, which could cause death or serious injury, disconnect battery cables (negative (-) cable first) before proceeding. (00307a)
WARNINGDisconnect negative (-) battery cable first. If positive (+) cable should contact ground with negative (-) cable connected, the resulting sparks can cause a battery explosion, which could result in death or serious injury. (00049a)
WARNINGGasoline is extremely flammable and highly explosive. Keep gasoline away from ignition sources which could result in death or serious injury. See the Safety chapter. (00635c)
NOTE
Cast pistons should not be used when engine speeds are expected to exceed 6000 rpms. Failure to do so may result in engine damage.
- Disassembly - See the Service Manual. Remove cylinder heads, cylinders and pistons.
- Inspection Of Parts - See the Service Manual for Inspection of Parts.
- Boring And Honing - See the Service Manual for Boring and Honing instructions.
- Assembly - See the Service Manual to install cylinder heads, cylinders and pistons.
Table 1. 1450 Piston Kit
P/N | Finished cylinder bore sizes, after honing | |
|---|---|---|
22156-99A | 0.005 Oversize bore (0.13 mm) | 3.75525+/-0.00025 in. (95.383+/-0.00635 mm) |
22161-99A | 0.010 Oversize bore (0.25 mm) | 3.76025+/-0.00025 in. (95.510+/-0.00635 mm) |
22141-99A | 0.020 Oversize bore (0.51 mm) | 3.77025+/-0.00025 in. (95.764+/-0.00635 mm) |
Table 2. 1550 Piston Kit
P/N | Finished cylinder bore sizes, after honing | |
|---|---|---|
22661-99A | Standard | 3.87525+/-0.00025 in. (98.431+/-0.00635 mm) |
22174-99A | 0.005 Oversize bore (0.13 mm) | 3.88025+/-0.00025 in. (98.558+/-0.00635 mm) |
22179-99A | 0.010 Oversize bore (0.25 mm) | 3.88525+/-0.00025 in. (98.685+/-0.00635 mm) |
22147-99A | 0.020 Oversize bore (0.51 mm) | 3.89525+/-0.00025 in. (98.939+/-0.00635 mm) |
NOTE
1550 Cylinders do not use O-rings (P/N 11273) on the top cylinder dowels. Therefore, do not install them when using torque plates or at final assembly of engine.
NOTE
Re-jetting, and/or re-timing of engine, may be required to realize full potential of this performance product. See your Harley-Davidson dealer for details.
See next page for ring data.
Table 3. Piston Specifications
PISTONS | 1450 | 1550 |
|---|---|---|
Fit in cylinder | 0.0006-0.0017 in. (0.015-0.043 mm) | 0.0006-0.0017 in. (0.015-0.043 mm) |
Compression ring gap Top Second | 0.010-0.020 in. (0.25-0.51 mm) 0.014-0.024 in. (0.36-0.61 mm) | 0.012-0.022 in. (0.30-0.56 mm) 0.015-0.025 in. (0.38-0.635 mm) |
Oil control rail gap | 0.010-0.050 in. (0.25-1.27 mm) | 0.010-0.050 in. (0.25-1.27 mm) |
Compression ring side clearance Top Second | 0.0012-0.0037 in. (0.030-0.094 mm) 0.0012-0.0037 in. (0.030-0.094 mm) | 0.0012-0.0037 in. (0.030-0.094 mm) 0.0012-0.0037 in. (0.030-0.094 mm) |
Oil control ring side clearance | 0.0031-0.0091 in. (0.079-0.23 mm) | 0.0012-0.0072 in. (0.030-0.18 mm) |
Piston pin fit | 0.0003-0.0005 in. (0.008-0.013 mm) | 0.0003-0.0005 in. (0.008-0.013 mm) |
Table 4. Piston Service Wear Limits
PISTONS | 1450 Replace if wear exceeds: | 1550 Replace if wear exceeds: |
|---|---|---|
Fit in cylinder | 0.005 in. (0.13 mm) | 0.005 in. (0.13 mm) |
Compression ring gap Top Second | 0.030 in. (0.76 mm) 0.034 in. (0.86 mm) | 0.032 in. (0.81 mm) 0.035 in. (0.89 mm) |
Oil control rail gap | 0.050 in. (1.27 mm) | 0.050 in. (1.27 mm) |
Compression ring side clearance Top Second | 0.0045 in. (0.11 mm) 0.0045 in. (0.11 mm) | 0.0045 in. (0.11 mm) 0.0045 in. (0.11 mm) |
Oil control ring side clearance | 0.010 in. (0.25 mm) | 0.010 in. (0.25 mm) |
Piston pin fit | 0.001 in. (0.025 mm) | 0.001 in. (0.025 mm) |
Figure 1. Service Parts
Table 5. Service Parts
Item | Description (Quantity) | Part Number |
|---|---|---|
1 | Piston (1450) Piston (1550) | Not sold Not sold |
2 | 1450 Ring set +.005 (2) +.010 (2) +.020 (2) | 21937-99 21938-99 21916-99 |
1550 Ring set Standard (2) +.005 (2) +.010 (2) +.020 (2) | 21918-99 21919-99 21945-99 21946-99 | |
2A | 1450 Piston and Ring Set Kits Piston and ring set (+.005) Piston and ring set (+.010) Piston and ring set (+.020) | 22390-99 22391-99 22392-99 |
1550 Piston and Ring Set Kits Piston and ring set (Standard) Piston and ring set (+.005) Piston and ring set (+.010) Piston and ring set (+.020) | 22394-99 22395-99 22396-99 22398-99 | |
Note: Includes items 1, 2, 3 and 4. | ||
3 | Piston Pin and Circlip Piston pin (2) | 22132-99 |
4 | Piston pin circlip (4) | 22097-99 |