Harley-Davidson
Harley-Davidson X440 / X440 OBDII / X440T Chain Lock / Master Link OEM | HDH40531RAA002
Harley-Davidson X440 / X440 OBDII / X440T Chain Lock / Master Link OEM | HDH40531RAA002
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Please order only after confirming the part number, model, variant, year, side, connector type and compatibility. All orders are non-cancellable once placed. Correctly shipped spare parts are not eligible for return, exchange or refund due to wrong selection, wrong diagnosis, fitment mismatch, mechanic recommendation or change of mind. Electrical/electronic items are additionally non-returnable once opened, installed, plugged in, tested or used. Wrong item, damaged item or missing item claims require a complete unboxing video within 24 hours. Read full Return & Warranty Policy
Replace a worn, damaged, or missing chain lock with this genuine OEM chain link component for Harley-Davidson X440 series motorcycles. Part number HDH40531-RAA-002 is listed in the genuine parts record as FLARING PIN ASSY. In normal buyer language, this is commonly understood as the chain lock, chain master link, or drive chain joining link.
This is the small but important chain joining component used in the final drive chain setup. Customers often search for this part as a chain lock or master link, so this listing uses both the OEM term and the common search terms naturally.
If the original chain lock is damaged during chain service, lost during removal, worn out, or being replaced as part of chain maintenance, this OEM component helps restore the chain connection correctly for the listed applications.
This part is confirmed for the following applications based on your genuine parts applicability screenshot:
- Harley-Davidson X440 (Sept 2023)
- Harley-Davidson X440 OBDII (May 2025)
- Harley-Davidson X440T (Jan 2026)
Not confirmed in the provided evidence: X440X and Hero Mavrick 440. Please do not assume wider fitment unless your old part, VIN, chain type, or EPC reference confirms the same part number.
This listing is for one chain lock / master link component only. It should not be assumed to include the full chain, front sprocket, rear sprocket, or a complete chain-sprocket kit unless separately stated.
Key Features
- Genuine OEM chain lock / master link component
- Part number: HDH40531-RAA-002
- Factory description: FLARING PIN ASSY
- Buyer language: chain lock, chain master link, joining link
- Confirmed for X440, X440 OBDII, and X440T
- Used in the final drive chain connection area
- Useful when the old chain lock is damaged, worn, or missing
- Important distinction from full drive chain and sprocket kit
- Helps customers find the part using normal search language
- OEM-style fit for the listed applications
Compatibility
| Make | Model / Variant | Platform | Years (Approx.) | Fitment Status | Notes |
|---|---|---|---|---|---|
| Harley-Davidson | X440 | Harley X440 | Sept 2023 | Confirmed | Shown in applicable models list for HDH40531-RAA-002. |
| Harley-Davidson | X440 OBDII | Harley X440 | May 2025 | Confirmed | Shown in applicable models list for HDH40531-RAA-002. |
| Harley-Davidson | X440T | Harley X440 T | Jan 2026 | Confirmed | Shown in applicable models list for HDH40531-RAA-002. |
| Harley-Davidson | X440X | Harley X440 family | Verify by VIN / EPC / old part match | Not confirmed in the provided applicability list. | |
| Hero | Mavrick 440 | Hero 440 platform | Verify by VIN / EPC / old part match | Not confirmed in the provided applicability list. |
What's in the Box
- 1 x HDH40531-RAA-002 – Chain Lock / Master Link Component (FLARING PIN ASSY)
Installation & Maintenance Notes
- This listing is for one chain lock / master link component only.
- Please match your old part number and exact chain setup before ordering.
- Do not assume this includes the full drive chain.
- If the chain is heavily worn, stretched, or damaged, inspect the full chain and sprocket set before replacing only the joining link.
- Chain service should be done correctly to ensure safe final drive operation.
Before You Order
Important: This is the OEM part identified as FLARING PIN ASSY, presented in buyer language as the chain lock / master link. It is not a full chain and not a complete chain-sprocket kit.
For X440X or Hero Mavrick 440, fitment is not confirmed in the provided applicability record. Please verify by VIN / EPC / old part match before ordering.
Why Buy From Under The Hood
- Uses both OEM name and normal buyer search terms
- Helps customers find the part as chain lock / master link
- Clear distinction between joining link and full chain kit
- Useful for owners and workshops doing chain service correctly
FAQs
1. What is HDH40531-RAA-002?
It is the OEM part listed as FLARING PIN ASSY, commonly searched as the chain lock, master link, or chain joining link.
2. Which bikes is this confirmed for?
This part is confirmed for Harley-Davidson X440, Harley-Davidson X440 OBDII, and Harley-Davidson X440T.
3. Is this a full chain?
No. This listing is for the chain lock / master link component only.
4. Will it fit X440X?
Please verify by VIN / EPC / old part match before ordering. X440X is not confirmed in the provided applicability list.
5. Will it fit Hero Mavrick 440?
Please verify before ordering. Mavrick 440 is not confirmed in the provided applicability list.
6. When should this part be replaced?
Replace it if the chain joining link is damaged, missing, worn, or being renewed during chain service.
7. What should be checked before ordering?
Please confirm the exact bike variant, old part match, and whether you need only the chain lock or a complete chain replacement.
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Verify Fitment on Official Brand Portals
Verify Fitment on Official Brand Portals
For selected genuine spare parts, you can cross-check the part number on the official brand portals before ordering.
Royal Enfield Official Spares Portal
Hero MotoCorp Official eCatalogue
