Honda Super Cub 110 / Cross Cub 110 50mm Cylinder Piston Gasket Kit
Brand new aftermarket standard-bore top-end rebuild kit for compatible Honda Super Cub 110 / NBC110 and Cross Cub 110 / NBC110X fuel-injected models using the KWB / K03 standard 50 mm cylinder family.
This is the 50 mm standard-bore Honda 110 engine family, producing approximately 109 cc with the original 55.6 mm stroke. It is not a 55 mm / 132 cc big-bore conversion.
Direct Fitment
- Honda Super Cub 110 / NBC110 (JA10 family) - 2013-2021
- Honda Cross Cub 110 / NBC110X (JA10 family) - 2013-2018
Honda catalogues use 12100-KWB-600 on earlier NBC110 / JA10 applications and 12100-K03-H10 on later production while retaining the same standard 50 mm / 13 mm piston family.
Kit Contents
- 1 x finned cylinder barrel
- 1 x 50 mm standard piston
- 1 x piston ring set
- 1 x 13 mm piston / gudgeon pin
- 2 x piston-pin circlips
- Top-end cylinder and head gaskets supplied as pictured
Technical Specification
- Standard bore: 50.0 mm
- Stroke family: 55.6 mm
- Nominal displacement: approximately 109 cc
- Piston-pin diameter: 13 mm
- Engine type: Single-cylinder 4-stroke
- Cooling: Air cooled
- Fuel system: Fuel injected
- Oil-temperature sensor port: KWB / K03 family
- Shopify shipping weight: 2.0 kg
- SKU: 01846-ENG
Honda OE / OEM Comparison References
- 12100-KWB-600 - cylinder family
- 12100-K03-H10 - later cylinder family
- 12191-KWB-920 - cylinder base gasket
- 12251-KWB-601 - cylinder head gasket
- 13101-KWW-740 - standard piston family
- 13011-KWW-740 - piston ring set
- 13111-KVR-C00 - piston pin
- 13115-KVR-C00 - piston-pin clip
Important Fitment Check
Before ordering, compare the original cylinder casting, oil-temperature sensor port, cylinder-base spigot, mounting-stud layout, head-gasket profile, 50 mm piston and 13 mm piston pin with the product photographs.
Honda used KWB and K03 cylinder revisions within this engine family. The OE references above identify the compatible standard-bore layout across the listed Super Cub 110 and Cross Cub 110 applications.
This listing is not for the 55 mm / 132 cc big-bore kit. It is also not intended for unrelated carbureted 110 engines where the cylinder or sensor arrangement differs.
When This Kit May Be Required
- Low compression
- Scored or worn cylinder bore
- Piston seizure
- Broken or worn piston rings
- Excessive oil consumption
- Top-end engine overhaul
Installation
Correct piston orientation, piston-ring positioning, circlip installation, cam timing, valve clearances and gasket preparation are essential. Inspect the connecting rod, crankshaft, cam chain and oil-temperature sensor during the rebuild. Professional installation is recommended.
Search Terms
Honda Super Cub 110 cylinder kit, Honda Cross Cub 110 cylinder kit, NBC110 cylinder piston kit, NBC110X cylinder kit, JA10 50mm piston, 12100-KWB-600, 12100-K03-H10, 13101-KWW-740, Honda 110 top end rebuild.
Condition: Brand new unbranded aftermarket replacement. OE numbers are supplied for identification and compatibility comparison only.