1978 Honda Z50A 78'/ Z50J1 50cc Complete Top End Kit 12200-GK4-761 12301-086-000
SKU: 15935600386

1978 Honda Z50A 78'/ Z50J1 50cc Complete Top End Kit 12200-GK4-761 12301-086-000

Sale price$69.99 Regular price$77.77
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Description

1978 Honda Z50A 78'/ Z50J1 50cc Complete Top End Kit 12200-GK4-761 12301-086-000Honda ST 50 Dax C 50 Z 50 Monkey Z50R XR CRF 50 50cc Complete Top End Kit Features: Complete engine cylinder Top end rebuild kit for Honda 50cc. If your cylinder blows through, the compression is too low, or even a piston seizure has occurred, then this kit is exactly the right thing for you. Kit includes cylinder, cylinder head, piston, rings, pin, clips & top end gasket kit (you get exactly what is pictured). Includes all gaskets pictured to rebuild

Honda ST 50 Dax C 50 Z 50 Monkey Z50R XR CRF 50 50cc Complete Top End Kit

Features:
Complete engine cylinder Top end rebuild kit for Honda 50cc.
If your cylinder blows through, the compression is too low, or even a piston seizure has occurred, then this kit is exactly the right thing for you.
Kit includes cylinder, cylinder head, piston, rings, pin, clips & top end gasket kit (you get exactly what is pictured).
Includes all gaskets pictured to rebuild top end.
Kit is for standard bore size - 39mm, 13mm steel piston pin.
This kit is excellent as a low-cost replacement for defects in the original cylinder.

Specifications:
Condition: Aftermarket 100% Brand New
Quantity: 1 Set
Material: Aluminum
Displacement: 49cc
Bore Type: Standard Bore
Bore Size: STD 39mm
Pin Diameter: 13mm
Cooling system: Air cooled

Replacement Part Number:
Cylinder: 12101-GB2-000
Cylinder Head: 12200-GK4-761
Cylinder Head Cover: 12301-086-000
Cylinder Head Cover Gasket: 12391-035-306, 12391-GB2-000
Cylinder Head R Side Cover: 12331-GB0-910
Cylinder Head R Side Cover Gasket: 12394-GB0-910
Cylinder Head L Side Cover: 12341-065-920
Cylinder Head L Side Cover Gasket: 12395-GB2-306
Valve Tappet Cap(x2): 12361-035-000
Cylinder Base Gasket: 12191-GW8-681, 12191-GW8-682, 12191-035-010, 12191-035-000
Cylinder Head Gasket: 12251-GBJ-003
Piston (Std): 13101-GBZ-701, 13101-GBZ-700
Pin, Piston: 13111-GB2-000
Piston Ring Set (Std): 13011-GBZ-702
Circlips, piston: 13115-001-000
Valve Stem Seals: 12209-GB4-681
Carb Insulator Gasket: 16201-165-A10

Fits Models:
Fit for Honda - 2004-2009 - CRF50F - Mini Cycle
Fit for Honda - 2011-2019 - CRF50F - Mini Cycle
Fit for Honda - 2000-2003 - XR50R - Mini Cycle
Fit for Honda - 1969-1978 - Z50A - Mini Trail
Fit for Honda - 1979-1999 - Z50R
Fit for Honda - 1986 - Z50RD
Fit for Honda - 1988 - ZB50
Fit for Honda - 1967 - Z50M
Fit for Honda - 1968-1969 - Z50A - K0
Fit for Honda - 1969-1970 - Z50A - K1
Fit for Honda - 1970-1971 - Z50A - K2
Fit for Honda - 1972 - Z50A - K3
Fit for Honda - 1973 - Z50A - K4
Fit for Honda - 1974 - Z50A - K5
Fit for Honda - 1975 - Z50A - K6
Fit for Honda - 1976 - Z50A - 76'/ Z50J1
Fit for Honda - 1977 - Z50A - 77'/ Z50J1
Fit for Honda - 1978 - Z50A - 78'/ Z50J1

Also fits Dax ST, Monkey, Gorilla, Chaly, SS, C, CD with 6 Volt (!) series engine, Jincheng, Dax Q5, Gorilla Q7, Sasy with 50cc cylinder head!
Fit for Honda - 1978-1990 - Z50J (6v)
Fit for Honda - 2009-2018 - Z50J (FI)
Fit for Honda - 1978-1988 - Z50G Gorilla (6v)
Fit for Honda - 1988-1990 - ST50 Dax
Fit for Honda - 1985-1996 - C50 Cub

(Compatibility Chart is for Reference ONLY!!!)
(Please Compare with Your faulty unit and the image we provided to Decide Fitment)

Package Includes:
1x Cylinder
1x Cylinder Head
1x Cylinder Head Cover
1x Cylinder Head Cover Gasket
1x Cylinder Head R Side Cover
1x Cylinder Head R Side Cover Gasket
1x Cylinder Head L Side Cove
1x Cylinder Head L Side Cover Gasket
2x Valve Tappet Caps
1x Cylinder Base Gasket
1x Cylinder Head Gasket
1x 39mm Piston (Std)
1x Piston Pin
1x Piston Ring Set (Std)
2x Circlips
2x Valve Stem Seals
1x Carb Insulator Gasket
1x O-Ring kit

Note:
Carefully compare to your old parts to be sure this is the correct part for your machine.

The product on offer is an accessory or spare part and thus is not an original product of the vehicle manufacturer.
The name of the vehicle manufacturer is stated only as an indication of the determination of the product being offered as an accessory or spare part, to clarify, for which vehicle the product on offer Fits.

Warranty:
1. Returns: Customers have the right to apply for a return within 60 days after the receipt of the product
2. 24-Hour Expert Online: Solve your installation and product problems

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 15935600386

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Reviewed in the United States on February 17, 2026
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★★★★★ 4
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Works right away. A good deal.
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Reviewed in the United States on February 22, 2026
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Natrona Heights, US
★★★★★ 3
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Te ideará bien los pies
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Massapequa, US
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