Hero Genuine Chain Sprocket Kit for Achiever 150 – Part No. 20K910S

Buy the Hero Genuine Chain Sprocket Kit (Chain Kit) for Hero Achiever 150 – Part No. 20K910S. This OEM chain-sprocket set is built for correct pitch and alignment, helping restore smooth pickup and reduce chain noise compared to worn or duplicate kits. Supplied as a genuine Hero packed unit. 

The Hero Genuine Chain Sprocket Kit (20K910S) is the OEM final-drive replacement set for the Hero Achiever 150 platform. In workshops, this is commonly called “chain kit / chain sprocket set / chain gear set / sprocket set (chain-chakkar set)”—and it should be replaced when the chain is stretched, sprocket teeth are hooked/sharp, the bike develops jerks under load, or chain slack keeps changing frequently.

Using a genuine Hero kit matters because chain drive components are highly tolerance-sensitive: tooth profile, sprocket hardening, and chain pitch must match exactly for stable power transfer. Local/duplicate kits often create excess noise, premature wear, and inconsistent adjustment, which increases running cost and reduces ride refinement. Hero’s own product description highlights high-carbon steel/heat-treatment intent for maximum power transfer and durability. 

This part number is listed by Hero’s official channel as “Chain Sprocket Kit – Achiever | Achiever | Achiever 150 – 20K910S”, with net quantity 1 unit and India as country of origin. 
At underthehood.co.in, we ship genuine parts with careful packing to protect sprocket teeth edges and ensure you receive the correct, authentic part number—critical in this category.

KEY FEATURES / BENEFITS 

• Genuine Hero MotoCorp part – OEM fit, correct pitch and driveline alignment 

• Part No. 20K910S – listed for Achiever / Achiever 150

• Common mechanic name: Chain Kit / Chain Sprocket Set

• Helps reduce chain noise, vibration and jerky pickup caused by worn sprockets

• Sold as 1 unit (sealed kit) in Hero channel

• Material/spec reference includes 45C8 steel and 3-part kit listing 

• Better long-term reliability than mixing new chain with old sprockets

• Ideal for periodic replacement during major service / drivetrain overhaul

COMPATIBILITY TABLE

PLEASE CHECK PART NUMBER BEFORE PURCHASE 

Note (important): Hero’s compatibility list includes multiple internal model codes (and even export-name variants). To avoid any mismatch, confirm 20K910S with your mechanic or Hero ASC using chassis/VIN before ordering. 

TECHNICAL SPECIFICATIONS 

• Part Number: 20K910S 

• Category: Chain Sprocket Kit / Chain Kit (Final Drive) 

• Common Name (Hero listing): Chain Sprocket Kit

• Net Quantity: 1 unit

• Country of Origin: India 

• Pack Weight (listed): 2256 g 

• Package Dimensions (listed): 20L × 20W × 1H cm 

• Material / kit spec (listing): 45C8; No. of parts: 03; sprocket dia 175.2 mm; sprocket weight 0.730 kg

WHAT’S IN THE BOX

• 1 × Hero Genuine Chain Sprocket Kit – Part No. 20K910S 

INSTALLATION & USAGE NOTES

• Recommended installation at a Hero Authorised Service Centre or by an experienced mechanic.

• Replace the full set (don’t mix new chain with worn sprockets).

• Check rear wheel alignment and set chain slack as per Achiever service procedure.

• Inspect front sprocket lock/retainer and rear sprocket fasteners during fitment.

• Re-check chain slack after short run-in riding and lubricate regularly.

FAQs 

Q1. Is 20K910S original Hero or aftermarket?
It is listed through Hero’s official sales channel as Chain Sprocket Kit – 20K910S. 

Q2. Which bike does 20K910S fit?
Verified listings map 20K910S to Hero Achiever / Achiever 150, including multiple Achiever model-year listings.

Q3. What is the common local name for this part?
Mechanics commonly call it chain kit / chain sprocket set / chain gear set.

Q4. Should I replace only the chain or the full kit?
Replace the full kit. A new chain on old sprockets (or vice-versa) wears faster and can increase noise.

Q5. How do I confirm fitment before ordering?
Match part number 20K910S with your chassis/VIN at a Hero ASC. This is the safest method when variants differ. 

Q6. Does the kit include multiple parts?
A trusted listing describes it as a 3-part kit. Always verify the exact contents on the kit label you receive. 

Q7. When should I replace the chain sprocket kit?
When chain slack changes frequently, sprocket teeth hook, chain makes noise, or you feel jerks during acceleration.