Honda SH125i 2013-2016 KZR 52.4mm Cylinder Piston Top End Kit
Standard-size 125cc top-end cylinder and piston rebuild kit for Honda SH125i applications using the Honda KZR/KWN 52.4 mm cylinder family. Suitable for repairing a worn, scored or low-compression top end where the original bore, piston-pin size and gasket profiles match.
Components Identified From the Product Photos
- 1 x finned 52.4 mm cylinder barrel / cylinder block with pressed cylinder liner
- 1 x matching standard-size aluminium piston
- 1 x complete piston-ring set including compression and oil-control rings
- 1 x 13 mm steel gudgeon / wrist pin
- 2 x 13 mm piston-pin circlips
- 1 x cylinder base gasket
- 1 x cylinder head gasket
- 1 x cam-chain tensioner gasket
Key Specification
- Nominal bore: 52.4 mm
- Engine displacement: approximately 124cc
- Stroke reference: 57.9 mm
- Piston-pin diameter: 13 mm
- Bore type: Standard replacement size
- Engine family: Honda KZR / KWN eSP-pattern 125cc top end
- Condition: New aftermarket replacement
Honda OE Reference Numbers
- Complete Honda cylinder/piston kit: 1210A-KZR-600
- Cylinder comp.: 12100-KZR-600
- Cylinder base gasket: 12191-KZR-600
- Cylinder head gasket: 12251-KZR-601
- Piston, standard: 13101-KWN-902
- Piston pin: 13111-KWN-900
- Piston ring set, standard: 13011-KWN-900
- Piston pin clips, 13 mm: 13115-GN5-910
- Cam-chain tensioner gasket: 14560-KZR-600
The supplied kit is unbranded aftermarket, not a genuine Honda kit. Honda numbers are supplied for identification and component cross-reference only.
Equivalent Aftermarket Manufacturer References
- maXpeedingrods equivalent MPN HZSCB5
- maXpeedingrods / marketplace equivalent MPN OP13FI
These are equivalent-market references for comparable 52.4 mm kits and are not claimed as the manufacturer part number of the supplied unbranded item.
Fitment
Honda SH125i (2013-2016)
Honda SH125i 2013-2016 as listed in the supplied export. Honda's 2016 SH125 parts catalogue confirms cylinder 12100-KZR-600; equivalent application data extends this family beyond 2016, but this listing stays within the seller's original year range.
Compatibility Check Before Ordering
- Confirm the original cylinder is the 12100-KZR-600 / KZR-family pattern
- Measure the bore — this kit uses the standard 52.4 mm size
- Confirm the piston pin is 13 mm
- Compare the cylinder height, lower spigot, stud positions and cam-chain tunnel with the photographs
- Compare the piston crown and valve-pocket arrangement with the original piston
- Check the cylinder-base, head and tensioner-gasket profiles before installation
Installation Notes
Top-end engine work should be carried out using the correct workshop procedure. Check piston-ring orientation and end gaps, lubricate the piston and bore during assembly, fit both pin clips securely, set cam timing correctly and tighten the cylinder-head fasteners to the Honda workshop specification. Replace contaminated engine oil and inspect the cooling and lubrication systems if the original top end failed from overheating or oil starvation.
What Is Included
One cylinder/piston top-end kit containing the cylinder barrel, piston, piston-ring set, 13 mm piston pin, two pin clips, cylinder base gasket, cylinder head gasket and tensioner gasket shown in the product photographs. Cylinder head, valves, camshaft, cam chain, tensioner assembly and crankshaft are not included.
Delivery & Returns
- Free UK delivery with an estimated 2–3 working-day service
- 30-day returns, subject to the item being returned in its original condition