Hero Genuine Chain Sprocket Kit (Y2K) for HF Deluxe & HF Dawn – Part No. 20K111S

Buy Hero Genuine Chain Sprocket Kit (Y2K) – 20K111S for HF Deluxe and HF Dawn from underthehood.co.in. This is an OEM chain + sprocket set (chain kit) designed for correct pitch, proper alignment, and long service life—helping you avoid noisy running, premature chain stretch, and local duplicate fitment issues. 

DETAILED DESCRIPTION 

The Hero Genuine Chain Sprocket Kit (Y2K) – 20K111S is the complete drive set used to transfer engine power to the rear wheel through the chain drive. Over time, chain links elongate and sprocket teeth wear (“hooking”), which leads to jerks in pickup, chain noise, uneven tension, and reduced mileage. Replacing only the chain or only one sprocket is a common mistake—your new part wears faster if the matching parts are already worn.

This kit is supplied as a genuine Hero part (not aftermarket), so you get the correct tooth profile, proper hardening/heat-treatment, and OE geometry intended for smooth power delivery and reliable performance. Hero’s own product description highlights high-carbon steel construction and durability focus for OEM-level performance. 

Verified fitment for this part number is HF Deluxe and HF Dawn (as listed by a serious parts exporter/marketplace), and the kit specification commonly references 14T front sprocket + 42T rear sprocket for this code in kit catalogues. 

At underthehood.co.in, we pack genuine parts carefully to protect teeth edges and avoid transit damage—so the kit reaches you in install-ready condition.

KEY FEATURES / BENEFITS

• Genuine Hero MotoCorp part – correct fit and OE quality assurance. 

• Complete chain sprocket kit (chain set / chain kit) for proper matched wear.

• Designed for smooth power transfer and reduced chain noise vs worn sets. 

• HF Deluxe & HF Dawn fitment (verified) for part number 20K111S. 

• Common kit spec reference: Front 14T + Rear 42T (verify before install). 

• Durable material / finish focus as per Hero listing (high-carbon steel description). 

• Helps restore pickup feel and reduces chain “tight-loose” behaviour after adjustment.

• Ideal for periodic replacement when sprocket teeth show hooking or chain stretch.

• Safer than local/duplicate sets that often cause premature wear and misalignment.

COMPATIBILITY TABLE

PLEASE CHECK PART NUMBER BEFORE PURCHASE 

Note (important): If your variant has been altered (different sprocket tooth count / wheel conversion / local changes), confirm using part number 20K111S with your mechanic or Hero ASC before ordering.

TECHNICAL SPECIFICATIONS 

• Part Number: 20K111S

• Category: Chain Sprocket Kit (Chain Kit / Chain Set) 

• Product Name (Hero): Chain Sprocket Kit – Y2K

• Country of Origin: India 

• Net Quantity: 1 unit 

• Weight (packed): 1807 g 

• Package Dimensions: 19.2 (L) × 4 (W) × 19.2 (H) cm 

• Common kit tooth reference: Front 14T + Rear 42T (catalog reference)

• MRP (Hero reference): ₹728 (MRP shown on Hero e-shop) 

WHAT’S IN THE BOX

• 1 × Hero Genuine Chain Sprocket Kit (Y2K) – Part No. 20K111S 

(Kit contents are sold as a single unit as per Hero listing. If you want me to list internal components like chain/front sprocket/rear sprocket individually, share a clear kit photo/label.)

INSTALLATION & USAGE NOTES

• Install via Hero Authorised Service Centre or an experienced mechanic (recommended).

• Replace the full set together (chain + sprockets) for best life and reduced noise.

• Inspect front sprocket splines and rear wheel alignment before fitting.

• After installation: set correct slack and re-check slack after 100–200 km run-in.

• Use chain lubricant regularly; avoid pressure-washing directly at chain O/X-ring area (if applicable).

• Dispose old parts responsibly.

FAQs 

Q1) Is 20K111S original Hero or aftermarket?
Original Hero Genuine part. The official Hero e-shop lists it as “Chain Sprocket Kit – Y2K – 20K111S.” 

Q2) Which bikes does 20K111S fit?
Verified fitment listings show HF Deluxe and HF Dawn for this code. 

Q3) Can I use this kit in other Hero 100cc bikes if the chain matches?
Do not assume. Tooth count and chain spec vary by model/year. Confirm with Hero ASC using 20K111S before ordering.

Q4) What is the common sprocket tooth count for 20K111S?
Kit catalog references commonly show front 14T and rear 42T for this code. Always verify your existing tooth count before install. 

Q5) Should I replace only the chain or the full kit?
Best practice is full kit replacement. A new chain on worn sprockets (or vice-versa) wears quickly and can create noise.

Q6) How do I know my sprocket is worn?
Look for “hooked” teeth, uneven tooth profile, chain tight-loose spots, frequent slack changes, and jerky pickup.

Q7) Is the ₹728 price the selling price?
₹728 is the MRP shown on Hero’s listing. Your final price depends on seller and offers at purchase time.