Rolon
Rolon KIT BSOR 139 Chain Sprocket Kit for Bajaj Pulsar 220 14T/37T 104L
Rolon KIT BSOR 139 Chain Sprocket Kit for Bajaj Pulsar 220 14T/37T 104L
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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
Rolon KIT BSOR 139 Chain Sprocket Kit for Bajaj Pulsar 220 14T/37T 104L
Restore smooth power delivery and reliable final-drive performance on your Bajaj Pulsar 220 with the Rolon KIT BSOR 139 Chain Sprocket Kit. This kit is built around the R520BSOR 104-link chain with a 14T front sprocket and 37T rear sprocket, matching the kit specification printed on the box: R520BSOR 104L / 14T / 37T (4H).
Important: This is the 4-hole 37T rear sprocket kit for Pulsar 220 applications. Do not confuse it with Pulsar 220 kits that use 36T rear sprocket, Avenger 220 kits, Pulsar NS/AS kits, or other 520 chain kits.
What This Product Is
- Rolon chain sprocket kit
- Kit code: KIT BSOR 139
- Chain specification: R520BSOR, 104 links
- Front sprocket: 14T
- Rear sprocket: 37T, 4-hole pattern
- Application: Bajaj Pulsar 220 where 14T/37T/104L 4-hole kit is required
What This Product Is Not
- Not a Bajaj genuine / OEM-packed part
- Not a brass/gold racing kit
- Not only chain; it is a chain + front sprocket + rear sprocket kit
- Not only sprocket set without chain
- Not Pulsar 220 14T/36T kit
- Not Avenger 220 chain sprocket kit
- Not Pulsar NS200 / AS200 / RS200 kit
Key Features
- Rolon aftermarket replacement chain sprocket kit
- Complete final-drive service kit: chain, front sprocket and rear sprocket
- 520-series sealed chain specification as printed on the kit box
- 104-link chain length
- 14T front and 37T rear sprocket combination
- 4-hole rear sprocket pattern for matching Pulsar 220 applications
- Good replacement option when chain is stretched, sprocket teeth are hooked, or final-drive noise has increased
Buyer Search Names / Internal Search Keywords
Rolon BSOR 139, KIT BSOR 139, BSOR139, R520BSOR 104L, Pulsar 220 chain sprocket kit, Pulsar 220 14T 37T kit, Pulsar 220 4 hole chain kit, Pulsar 220 Rolon chain kit, Pulsar 220 O-ring chain kit, Bajaj Pulsar 220 chain set, Bajaj Pulsar 220 sprocket kit, chain sprocket kit Pulsar 220 104L.
Confirmed Compatibility
| Brand | Model | Required Specification | Kit Code |
|---|---|---|---|
| Bajaj | Pulsar 220 / Pulsar 220F | 520 chain, 104L, 14T front, 37T rear, 4-hole rear sprocket | KIT BSOR 139 |
Fitment Not Confirmed / Check Before Ordering
| Model / Situation | Reason to Check |
|---|---|
| Pulsar 220 variants using 36T rear sprocket | This kit is 37T rear. Some Pulsar 220 kits are sold with 36T rear sprocket, so match the old sprocket teeth count before ordering. |
| Pulsar 220 with changed/custom gearing | Previous owner or mechanic may have changed sprocket size. Count teeth and match chain length. |
| Pulsar 200 NS / AS / RS | Different chain length and rear sprocket combination may be used. Do not order by 520 chain size alone. |
| Avenger 220 | Different kit references exist for Avenger 220; do not assume Pulsar 220 kit fitment. |
Not Compatible / Do Not Order For
- Bajaj Avenger 220
- Pulsar NS200 / AS200 / RS200 unless old kit exactly matches 104L / 14T / 37T / 4-hole
- Pulsar 150 / 180 / 200 older variants unless exact old kit matches
- Any motorcycle requiring 36T rear sprocket
- Any motorcycle requiring different chain pitch, chain link count, or rear sprocket hole pattern
Technical Details
| Brand | Rolon |
| Kit Code | KIT BSOR 139 |
| Chain | R520BSOR |
| Chain Links | 104L |
| Front Sprocket | 14T |
| Rear Sprocket | 37T |
| Rear Sprocket Pattern | 4H / 4-hole |
| Category | Aftermarket chain sprocket kit |
Similar Parts Comparison
| Kit / Product | Specification | Use Case |
|---|---|---|
| Rolon KIT BSOR 139 | R520BSOR 104L / 14T / 37T / 4-hole | Pulsar 220 where 37T rear sprocket setup is required |
| Pulsar 220 14T/36T kits | 104L / 14T / 36T | Only for bikes requiring 36T rear sprocket |
| Avenger 220 kits | Usually separate chain length/sprocket kit reference | Do not substitute with Pulsar 220 BSOR 139 |
When Should This Be Replaced?
- Chain has stretched and adjustment is almost finished
- Rear sprocket teeth look hooked or sharp
- Front sprocket is worn
- Chain has tight spots, rust, or excessive noise
- Bike jerks during acceleration due to worn final-drive parts
- Mechanic recommends replacing chain and sprockets together
Recommended Related Parts to Check
- Chain slider / chain guide condition
- Rear wheel bearing condition
- Front sprocket cover area and locking hardware
- Rear sprocket mounting nuts/bolts
- Chain adjusters and rear axle nut condition
- Chain lubricant and chain cleaning brush
What’s in the Box
- 1 × Rolon R520BSOR 104-link chain
- 1 × 14T front sprocket
- 1 × 37T rear sprocket, 4-hole pattern
Installation Notes
Install by a trained mechanic. Replace the chain, front sprocket and rear sprocket together for correct wear matching. After installation, set chain slack as per the motorcycle service requirement, align the rear wheel correctly, tighten all fasteners properly, and recheck chain slack after the first short ride.
Return-Prevention Note
Before ordering, confirm your old kit specification: 520 chain, 104 links, 14T front sprocket, 37T rear sprocket and 4-hole rear sprocket pattern. This kit should not be ordered for motorcycles requiring a 36T rear sprocket, different link count, different pitch, or different sprocket-hole pattern.
FAQs
What is Rolon KIT BSOR 139?
Rolon KIT BSOR 139 is a chain sprocket kit for Bajaj Pulsar 220 applications using R520BSOR 104L chain, 14T front sprocket and 37T rear sprocket.
Will this fit Bajaj Pulsar 220?
Yes, use it for Pulsar 220 / Pulsar 220F where the old kit matches 104L chain, 14T front and 37T rear 4-hole sprocket setup.
Is this kit 14T/37T?
Yes. The kit specification is 14T front sprocket and 37T rear sprocket.
How many chain links are included?
This kit uses a 104-link R520BSOR chain.
Is this a 4-hole rear sprocket?
Yes. This kit is for the 4-hole rear sprocket setup.
Will it fit Pulsar 220 with 36T rear sprocket?
No. If your motorcycle requires a 36T rear sprocket kit, use the correct 36T kit instead of BSOR 139.
Is this genuine Bajaj?
No. This is a Rolon aftermarket chain sprocket kit, not Bajaj OEM packaging.
SEO Tags
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Image Filename Suggestions
- rolon-kit-bsor-139-pulsar-220-chain-sprocket-kit-14t-37t-104l.jpg
- rolon-r520bsor-104l-pulsar-220-chain-kit.jpg
- pulsar-220-4-hole-37t-14t-rolon-chain-sprocket-kit.jpg
Image Alt Text Suggestions
- Rolon KIT BSOR 139 chain sprocket kit for Bajaj Pulsar 220 14T 37T 104L
- Rolon R520BSOR 104 link chain kit for Pulsar 220 with 4 hole rear sprocket
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