Hero Genuine Maestro Head Cover Gasket | Top Cover O Ring / Tappet Cover Packing | 12391KWP900S

Hero Genuine Maestro Head Cover Gasket

Replace a hardened, leaking, cut, flattened, or damaged head cover gasket with the Hero Genuine Maestro Head Cover Gasket. This genuine Hero gasket seals the cylinder head cover / tappet cover area on compatible Hero Maestro scooter engines and helps prevent engine oil seepage from the top cover when fitted correctly.

The part is commonly searched by scooter owners and mechanics as a head cover gasket, cylinder head cover gasket, tappet cover O-ring, top cover O-ring, valve cover gasket, head packing, or tappet cover packing. Choosing the correct genuine Hero gasket helps maintain proper sealing, correct shape, heat resistance, and engine-oil leak prevention compared to local or wrongly sized packing.

This SKU should be matched carefully with the old gasket and scooter variant before ordering. Head cover gaskets can differ by engine generation, cover profile, groove shape, sealing thickness, and part number, so exact part-number confirmation is important before fitment.

What This Product Is

• Hero Genuine head cover gasket / tappet cover packing / top cover O-ring
• Product identity: GASKET, HEAD COVER
• Part number: 12391KWP900S
• Formatted part number: 12391-KWP-900S
• Common buyer/mechanic terms: head cover gasket, cylinder head cover gasket, tappet cover O-ring, top cover O-ring, valve cover packing
• Application: Cylinder head cover sealing gasket for confirmed Hero Maestro variants

Key Features

• Genuine Hero head cover gasket for compatible Maestro scooters
• Correct replacement for part number 12391KWP900S
• Helps seal the cylinder head cover / tappet cover area
• Useful for oil seepage, top cover leakage, hardened gasket, cut gasket, or repeated tappet-cover oil marks
• Supports proper groove fit when installed on the correct engine cover
• Better sealing confidence than local or incorrectly shaped packing
• Single gasket supplied
• Quantity per box: 1 unit
• Strong search identity: head cover gasket, tappet cover O-ring, top cover O-ring, head packing

Confirmed Compatibility

• Hero Maestro (Feb., 2012)
• Hero Maestro (Oct., 2014)

No wider compatibility is being added for Maestro Edge, Maestro Edge 125, Duet, Destini, Pleasure, Pleasure Plus, Xoom, Activa, Jupiter, Access, or any other scooter unless the same part number is confirmed for that vehicle.

Fitment Note / Return Prevention Note

Before ordering, match the existing gasket with part number 12391KWP900S / 12391-KWP-900S, the scooter model, engine generation, head cover groove shape, gasket profile, and old gasket size.

Do not order this only by visual similarity. Head cover gaskets can look similar but differ in shape, thickness, and sealing profile. Match the old part number or confirm by VIN/chassis-based parts lookup before purchase.

What You Will Receive

• 1 × Hero Genuine Head Cover Gasket
• Part number: 12391KWP900S
• Head cover gasket / top cover O-ring only
• Does not include head cover, cylinder head, tappet cover bolts, washers, sealant, valve parts, engine oil, or any other engine components unless separately mentioned

Technical Details

Installation Note

Professional installation is recommended. Before fitting, clean the head cover groove and mating surface properly, remove old gasket residue, check the cover for cracks or warping, and install the gasket without twisting or pinching. After installation, check for oil leakage after the engine reaches operating temperature.

FAQs

Q1. What is Hero part number 12391KWP900S?
It is a Hero Genuine head cover gasket, also called a cylinder head cover gasket, top cover O-ring, tappet cover O-ring, or head packing.

Q2. Which scooters is this gasket confirmed for?
It is confirmed for Hero Maestro (Feb., 2012) and Hero Maestro (Oct., 2014).

Q3. Is this the cylinder head gasket?
No. This is the head cover / tappet cover gasket. It should not be confused with the main cylinder head gasket.

Q4. Can this fit Maestro Edge, Duet, Destini, Pleasure, Xoom, Activa, Jupiter, or Access?
No wider compatibility is being claimed. Order only if your scooter requires part number 12391KWP900S.

Q5. When should the head cover gasket be replaced?
Replace it if there is oil seepage from the tappet cover/head cover area, the old gasket is hard or flattened, or the cover was opened during engine repair.

Q6. Will this solve all engine oil leaks?
It can solve leakage from the head cover gasket area. If the head cover, bolts, breather, cylinder head, crankcase pressure, or another gasket is faulty, those parts should also be checked.

Q7. Is this a genuine Hero spare part?
Yes, this listing is for a Hero Genuine head cover gasket with part number 12391KWP900S.

Q8. How can I confirm fitment before ordering?
Match the part number, scooter model, engine generation, old gasket shape, and head cover groove. VIN/chassis-based confirmation is recommended for best accuracy.