Hero Genuine Chain Sprocket Kit for Ignitor – Part No. 20K820S

The Hero Genuine Chain Sprocket Kit – 20K820S is the OEM replacement set for the Hero Ignitor final drive. This is the correct solution when your bike shows common wear symptoms like chain tight spots, frequent slack changes, jerky throttle response, rattling noise, or hooked sprocket teeth. In local workshop language, riders also ask for it as “chain kit / chain sprocket set / chain gear set / sprocket set / chain-chakkar set.”

Going with genuine Hero matters because chain-drive components depend on accurate sprocket tooth profile and consistent pitch—small tolerances affect noise, smoothness, and service life. Hero’s official product page highlights high carbon steel, heat-treated, and precision-engineered intent for better power transfer and reduced noise/vibration on the Ignitor platform.

For fitment confidence, independent genuine-parts listings confirm 20K820S for Ignitor (May 2012) and Ignitor (Nov 2014) variants, which helps avoid “similar looking” kits that do not match correctly.

At underthehood.co.in, we focus on genuine packaging, careful packing, and quick dispatch, so you receive the correct Hero part number in proper condition—critical for sprocket teeth edges and chain durability.

KEY FEATURES / BENEFITS

• Genuine Hero MotoCorp part – OEM driveline geometry and correct fitment

• Part No. 20K820S – official common name: Chain Sprocket Kit

• Verified applicability: Hero Ignitor (May 2012 / Nov 2014)

• Heat-treatment + high-carbon steel intent for durability and stable power transfer

• Reduces unnecessary noise and vibration caused by worn chain/sprockets

• Helps maintain efficient transmission with minimal power loss (as per Hero listing)

• Seller spec indicates 3-part kit construction (kit consist 3 parts)

• Best practice replacement during major service to restore smooth riding feel

COMPATIBILITY TABLE

Note: If your RC/variant differs, confirm 20K820S with a Hero ASC or Hero e-catalogue using chassis/VIN before ordering (avoid mismatch with other 150cc platform kits).

TECHNICAL SPECIFICATIONS 

• Part Number: 20K820S

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

• Net Quantity: 1 unit

• Country of Origin: India

• Weight (Hero listing): 1973 g

• Package Dimension (Hero listing): 20L × 20W × 1H cm

• Material / kit spec (seller spec): Material SCM415; No. of parts: 03; sprocket dia 61.4 mm; sprocket weight 0.089 kg

• Construction intent (Hero listing): high carbon steel, heat treated, precision-engineered for Ignitor

WHAT’S IN THE BOX

• 1 × Hero Genuine Chain Sprocket Kit – Part No. 20K820S

(Seller spec references a 3-part kit; verify exact internal contents from the pack label you receive.)

INSTALLATION & USAGE NOTES

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

• Replace as a complete set (do not mix new chain with worn sprockets).

• Set chain slack and wheel alignment exactly as per Ignitor service practice.

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

• Lubricate chain after fitment and re-check slack after a short run-in ride.

FAQs 

Q1. Is 20K820S an original Hero chain kit or aftermarket?
It is listed as a Hero Genuine Chain Sprocket Kit with part number 20K820S. Always match the code on the pack label.

Q2. Which bike model does 20K820S fit?
Verified sources map 20K820S to Hero Ignitor, including May 2012 and Nov 2014 entries.

Q3. I have another 150cc Hero bike—will this kit fit?
Do not assume. Many 150cc bikes use different sprocket sizes/ratios. Confirm by VIN/chassis in Hero e-catalogue/ASC before ordering.

Q4. What is the common local name for this part?
It’s commonly asked as chain kit, chain sprocket set, or chain gear set—but always verify using 20K820S.

Q5. Should I replace only the chain or the full kit?
Replace the full kit. Mixing new and worn parts increases noise and shortens life.

Q6. What are the signs that my chain kit is finished?
Hooked sprocket teeth, frequent slack changes, noise, vibration, or jerks during acceleration.

Q7. Does the kit include multiple parts?
A seller spec describes it as a 3-part kit; confirm exact contents from the pack label you receive.