The BAKER 30-Tooth Compensator Sprocket Kit is a high-performance drivetrain upgrade designed for select Harley-Davidson models, including Dyna, Softail, and Touring models from 2006 to 2018 and beyond. This kit increases the primary drive ratio by 13%, effectively enhancing engine performance and providing a smoother, quieter, and more durable drivetrain operation. Installation of the BAKER Compensator Sprocket Kit requires specific tools, parts, and a careful adherence to technical procedures outlined in the manufacturer’s documentation. This guide compiles the essential steps, requirements, and considerations for a successful installation, based exclusively on the official product manual and supplementary documentation provided by BAKER Drivetrain.
Overview of the BAKER 30-Tooth Compensator Sprocket Kit
The BAKER 30-Tooth Compensator Sprocket Kit is designed for use with Twin Cam and Milwaukee-Eight® engines. It is available in several part numbers to accommodate different model years and configurations:
- PN 731-67 & 731-M8: For Softail and Twin Cam models from 2006 to 2018 and later Milwaukee-Eight models.
- PN 732-67 & 732-M8: For Touring models from 2007 to 2017 and later Milwaukee-Eight models.
The kit is not compatible with certain Softail models equipped with wide rear tires such as the Fat Boye® and Breakout®. The compensator sprocket is engineered with a 30-tooth design, which provides a 13% increase in primary drive ratio. This increase is particularly beneficial for users with modified or high-performance engines, as it can bridge the performance gap between stage 1 and stage 2 engine builds.
The BAKER Compensator Sprocket Kit also includes several design improvements over stock factory components, including wider cam lobe geometry, improved ramp angles, and a circular oil skirt that enhances lubrication distribution. These enhancements contribute to increased durability and reduced drivetrain wear over time.
Required Parts and Tools for Installation
Installation of the BAKER 30-Tooth Compensator Sprocket Kit requires the use of specific tools and replacement parts. The manufacturer emphasizes the importance of using the correct components to ensure compatibility, performance, and safety. The following list summarizes the necessary parts and tools, as specified in the official manual:
Essential Parts
| Qty | Part Number | Description |
|---|---|---|
| 1 | 10500031 | 9/16-12 Bolt |
| 1 | 619-67 | Retainer, Comp Sprocket |
| 1 | BD-40100064 | Thrust Washer |
| 1 | 621-30 | 30 Tooth Comp Sprocket |
| 1 | 722-67 | Motor Extension Shaft |
In addition to these components, users must also ensure that their motorcycle is equipped with the appropriate rotor. Early factory compensators used a rotor with an integrated compensator spring cup, which must be replaced with a late-style rotor (PN 30041-08A) for compatibility. 2006 Dyna models also require a stator retrofit (PN 30017-07).
Required Tools
- T-70 Torx socket: For removal and installation of the sprocket assembly.
- 9/16-12 bottoming tap or thread chaser: To clean the sprocket shaft female threads.
- Primary Drive locking tool (HD-48219 or ID-47977): Depending on the model, either the HD-48219 (Touring) or ID-47977 (Softail/Dyna) must be used.
- Factory service manual: Required for reference during installation and torque specifications.
The manufacturer highly recommends replacing the automatic chain tensioner with the 177-67A-A Armored Attitude Adjuster during the installation. This replacement has been shown to reduce bending moment loading on the motor sprocket shaft and transmission mainshaft, thereby extending drivetrain component life.
Step-by-Step Installation Procedure
The installation of the BAKER 30-Tooth Compensator Sprocket Kit requires a methodical and precise approach. The following steps are derived from the official installation manual and are presented in a structured sequence to ensure clarity and accuracy.
1. Preparation and Safety
Before beginning the installation, ensure that the motorcycle is securely supported on a stand. The user should also wear appropriate safety gear, including eye protection, especially when using shop air to clean the sprocket shaft threads. The installation should be performed in a clean, well-lit workspace to avoid contamination of internal components.
2. Disassembly of the Primary Drive
To begin, remove the primary cover and inspect the internal components for wear or damage. It is necessary to remove the existing sprocket assembly using a T-70 Torx socket. Once removed, use a 9/16-12 bottoming tap or thread chaser to clean the sprocket shaft female threads. This step is crucial to ensure a secure and proper fit for the new compensator sprocket.
3. Installation of Shims (If Required)
In some cases, shims may be necessary to align the sprockets correctly. To determine whether shims are required, install only the clutch and compensator sprocket without the chain. Use spacers to replicate the thickness of the outer primary and install a long ¼-20 threaded bolt into the primary as a reference. Place a straightedge across the ends of the sprockets and use a dial caliper to measure the distance from the straightedge to the gasket surface of the inner primary. Repeat the measurement for the compensator and clutch sides. The difference between the two measurements indicates the required shim thickness.
If shims are required, install them on the crankshaft up against the stator rotor assembly before proceeding with the compensator sprocket installation.
4. Lubrication and Assembly
Apply primary drive lubricant to the compensator sprocket bore, cam lobes, cam slider, motor extension shaft splines (both inner and outer), and the pre-installed O-ring. The manufacturer recommends the use of Spectro Heavy Duty Primary Chaincase Oil or HD Formula+ Transmission and Chaincase Lubricant (99851-05) for optimal performance and durability.
For non-Milwaukee-Eight® models, install the spacer (617-67) onto the crankshaft. Milwaukee-Eight® models do not use a spacer, as the spring cup will directly contact the stator rotor. Slide the cam slider (623-67-4) onto the motor extension shaft (722-67) and attach the spring cup assembly. Ensure that the lip of the spring cup faces toward the engine.
Align the crankshaft and extension shaft splines and slide the assembly onto the motor crankshaft. Install the compensating sprocket (621-30), retainer (619-67), thrust washer (BD-40100064), and bolt (10500031). The assembly should be installed in the same sequence as shipped and as shown in the manufacturer’s instructions.
5. Chain Alignment and Torque Specifications
With the clutch and compensator sprockets installed (without the chain), use a primary locking tool between the sprockets to torque the clutch nut to factory specifications. The compensator bolt (10500031) should be torqued to 100 ft-lbs, then backed off by half a turn and re-torqued to 175 ft-lbs for the final tightening. This two-step torque process ensures proper alignment and secure fastening.
When the chain is installed, ensure that the two measurements taken during the alignment process are within 0.030 inches of each other. If this condition is met, proceed to final assembly. Apply red Loctite® to the compensator bolt and clutch nut threads to prevent loosening over time.
6. Final Assembly and Primary Oil Fill
After all components have been installed and torqued, reassemble the primary cover using a new primary cover gasket. Fill the primary case with the recommended lubricant according to the Factory Service Manual specifications. The manufacturer recommends Spectro Heavy Duty Primary Chaincase Oil or HD Formula+ Transmission and Chaincase Lubricant (99851-05) for optimal performance.
Additional Considerations and Recommendations
BAKER Drivetrain provides additional guidance and considerations to ensure the best possible outcome from the installation of the 30-Tooth Compensator Sprocket Kit:
- Retrofit Requirements: For motorcycles equipped with early-style compensators, a retrofit to a late-style rotor (PN 30041-08A) is required. 2006 Dyna models also require a stator retrofit (PN 30017-07).
- Chain Tensioner Replacement: The manufacturer recommends replacing the automatic chain tensioner with the 177-67A-A Armored Attitude Adjuster during installation. This replacement has been shown to reduce bending moment loading and extend drivetrain component life.
- Lubricant Recommendations: The use of Spectro Heavy Duty Primary Chaincase Oil or HD Formula+ Transmission and Chaincase Lubricant is strongly recommended to ensure proper lubrication and heat dissipation.
- Torque Specifications: Always refer to the Factory Service Manual for torque specifications. The two-step torque process for the compensator bolt is critical to achieving proper alignment and secure fastening.
- Safety Precautions: When using shop air to clean the sprocket shaft threads, wear eye protection to prevent injury from debris.
Compatibility and Fitment
The BAKER 30-Tooth Compensator Sprocket Kit is designed to fit a range of Harley-Davidson models with Twin Cam and Milwaukee-Eight® engines. The specific fitment details are as follows:
- 2006–2017 Dyna Models and 2007–2017 Softail Models (PN 731-67)
- 2007–2016 Touring Models (PN 732-67)
- 2017–Later Touring Milwaukee 8 Models (PN 732-M8)
- 2018–Later Softair Milwaukee 8 Models (PN 731-M8)
It is important to note that the compensator sprocket is currently not compatible with certain Softail models equipped with wide rear tires, such as the Fat Boye® and Breakout® models with 240 rear tires.
Warranty and Disclaimer
BAKER Drivetrain provides a limited warranty for its products when used in accordance with the manufacturer’s specifications. The warranty does not apply if the product is used in applications other than American V-Twin motorcycles. Additionally, if a BAKER product is disassembled during the warranty period for any reason other than diagnostic purposes, the warranty is void.
The use of the terms "Harley" and "H-D" is for reference only and does not imply any association or endorsement by Harley-Davidson. It is the sole responsibility of the user to determine the suitability of the product for their specific use and to assume all legal, personal injury, and liability risks associated with its use.
Ordering and Payment Information
BAKER Drivetrain accepts various payment methods, including VISA, MasterCard, American Express, Discover, and wire transfers. Orders from outside the United States must be pre-paid in US funds via wire transfer. A $30 wire transfer fee applies to all wire transfers. Orders not pre-paid will be sent C.O.D. and must be paid with a certified check or money order unless pre-approved for company check acceptance.
Conclusion
The BAKER 30-Tooth Compensator Sprocket Kit is a high-performance upgrade designed to enhance drivetrain efficiency, durability, and overall performance in select Harley-Davidson models. The installation process, while detailed and precise, is manageable with the proper tools, parts, and adherence to the manufacturer’s instructions. Users are encouraged to consult the Factory Service Manual and follow all safety precautions to ensure a successful and safe installation. The kit’s design improvements, including the 13% increase in primary drive ratio, make it a valuable addition for riders seeking improved engine response and drivetrain longevity.