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CYLINDER KIT 58mm BORE PISTON RINGS GASKETS 2004-2017 HONDA CBR125 CBR125R

CYLINDER KIT 58mm BORE PISTON RINGS GASKETS 2004-2017 HONDA CBR125 CBR125R

£109.55 GBP
£109.55 GBP
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Taxes included.
This 58mm Cylinder Piston Gasket Rebuild Kit is an aftermarket top-end replacement designed to restore the cylinder and piston assembly. The kit includes all necessary components to address issues such as low compression, cylinder blow-through, or piston seizure. Modification to the crankcase surface may be required for proper fitment depending on engine type.

Compatible Models

  • Honda CBR125R: 2004–2017

  • Honda FS125 Sonic: 2001–2008

Features

  • Suitable for addressing low compression, piston seizure, or cylinder failure

  • Includes cylinder, piston, rings, wristpin, clips, and full top-end gasket kit

  • Piston is anodized for improved heat resistance and extended service life

  • Gaskets made from high-performance materials for increased reliability

  • Designed for standard bore size: 58mm x 47.2mm stroke

  • 13mm steel piston pin

  • Compression Ratio: 11:1

  • Cost-effective replacement for original components

Specifications

  • Condition: Aftermarket

  • Quantity: 1 Set

  • Material: Aluminum

  • Displacement: 124cc

  • Bore Type: Standard Bore

  • Cylinder Type: KGH

  • Bore Diameter: 58mm (STD)

  • Stroke: 47.2mm

  • Pin Diameter: 13mm

Cross-Reference OEM Part Numbers

  • Cylinder: 12100-KGH-900

  • Cylinder Base Gasket: 12191-KGH-901

  • Cylinder Head Gasket: 12251-KTY-D30

  • Piston (Std): 13101-KGH-902

  • Pin, Piston: 13111-KGH-903

  • Piston Ring Set (Std): 13011-KGH-305

  • Circlips, Piston: 13115-GN5-910

  • Tensioner Gasket: 14560-KGH-900

  • Valve Stem Seal: 12209-GB4-682

Attention

  • This kit originates from the Honda Sonic 125, which shares the same engine platform as the European CBR125R and Indonesian CS1 4-stroke engines

  • The cylinder surface design differs slightly between Sonic and CBR125 models

  • For CBR125R installation, modification of the crankcase surface is required to eliminate any gap (modification methods include welding or using a two-component epoxy aluminum glue)

  • After modification, the cylinder is compatible with both Sonic and CBR engines

Package Includes

  • 1x 58mm Cylinder (12100-KGH-900)
  • 1x Piston
  • 1x Piston Ring Set
  • 1x Wristpin
  • 2x Circlips
  • 1x Cylinder Base Gasket (12191-KGH-901)
  • 1x Cylinder Head Gasket
  • 1x Tensioner Gasket
  • 2x Valve Stem Seals

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