Hero HF Deluxe / Passion Pro / Splendor Plus Cylinder Kit | Genuine Block Piston Kit | K12121AAHAH00S

Hero HF Deluxe / Passion Pro / Splendor Plus Cylinder Kit – K12121AAHAH00S

Restore engine compression and rebuild a worn or damaged cylinder section with the Hero Genuine Cylinder Kit K12121AAHAH00S. This genuine Hero engine kit is best supported for selected HF Deluxe, HF Deluxe iBS, Passion Pro, and Splendor Plus applications, particularly model references from approximately 2016–2019, where this exact part number is specified.

This product is commonly searched as HF Deluxe block piston kit, HF Deluxe cylinder kit, Passion Pro cylinder kit, Splendor Plus block piston kit, Hero bore kit, Hero engine cylinder kit, piston cylinder kit, block piston assembly, and K12121AAHAH00S.

What This Product Is

• Hero Genuine engine cylinder kit
• Catalogue description: CYLINDER KIT
• Part number / MPN: K12121AAHAH00S
• Common market name: Cylinder kit / block piston kit / bore kit
• Application area: Engine cylinder and piston section
• Manufacturer: Hero MotoCorp

Key Benefits

• Genuine Hero engine-rebuild component
• Designed for the matching Hero 100 cc engine family
• Useful for diagnosed compression loss, worn cylinder bore, piston damage, excessive oil consumption, smoke, piston slap, or major engine overhaul
• Helps restore proper compression and combustion when installed with serviceable related components
• Exact-SKU fitment offers better reliability than selecting a universal bore kit only by engine capacity

Best-Supported Compatibility

• Hero HF Deluxe — selected applications where K12121AAHAH00S is specified
• Hero HF Deluxe iBS — selected applications
• Hero Passion Pro — selected applications
• Hero Splendor Plus / Splendor+ — selected applications
• Hero Eco Deluxe i3S / equivalent export-market application where the exact part number is listed

Public fitment records support HF Deluxe, HF Deluxe iBS, Passion Pro, and Splendor Plus applications around 2016–2019. Exact model-year and engine-code confirmation remains essential because these model families use multiple cylinder-kit revisions.

Critical Fitment and Return-Prevention Note

Before ordering, match K12121AAHAH00S with the existing kit or Hero EPC/VIN record. Also verify the motorcycle model, model year, engine family, cylinder design, piston specification, gasket arrangement, and fuel/emission generation.

Do not confuse this SKU with other Hero cylinder kits such as K12121AANNB00S, K12121AAWA000S, K12121AATA000S, or other visually similar Hero kits. They may use different pistons, cylinder dimensions, coatings, gaskets, or engine applications.

Kit Contents

This product is identified as a CYLINDER KIT. The exact bill of materials for K12121AAHAH00S is not clearly published in the reliable public sources reviewed. Only the components physically present inside the sealed Hero package should be promised as included.

What You Will Receive

• 1 × Hero Genuine Cylinder Kit
• Part number: K12121AAHAH00S
• Only the parts packed inside the sealed Hero kit
• Cylinder head, valves, camshaft, crankshaft, connecting rod, timing chain, clutch parts, engine oil, labour, and unrelated overhaul components are not included unless physically packed and explicitly stated

Technical Details

Installation Note

Professional engine installation is strongly recommended. Before assembly, inspect the cylinder head, valves, connecting rod, crankshaft play, oil pump, cam chain, guides, tensioner, studs, mating surfaces, and lubrication system. Confirm piston orientation, ring gaps, timing marks, torque values, and valve clearance before starting the engine.

Buyer-Focused FAQs

Q1. What is Hero part number K12121AAHAH00S?
It is a Hero Genuine Cylinder Kit used on selected HF Deluxe, HF Deluxe iBS, Passion Pro, and Splendor Plus applications.

Q2. Does it fit every HF Deluxe or Splendor Plus?
No. These models have multiple engine and cylinder-kit revisions. Match the exact part number through the old packet, engine record, VIN, or Hero EPC.

Q3. Is this a complete engine overhaul kit?
No. It is a cylinder kit, not a complete engine overhaul kit.

Q4. Are the piston, rings, pin, clips, and gaskets included?
Do not promise individual contents until the sealed package is checked. The exact public BOM for this SKU could not be confirmed reliably.

Q5. Can it be used for Hero Glamour or newer BS6 models?
No such fitment should be assumed. Use only where K12121AAHAH00S is confirmed.

Q6. Should a mechanic install it?
Yes. Cylinder-kit replacement involves precision engine assembly, measurements, timing, lubrication, and torque procedures.