Piston Rings SK157FMI-G for SK125-22, SK125-8
PSTR029
£7.99 £6.39
Special Offer
Special Offer
Piston Rings SK157FMI-G for SK125-22, SK125-8

£7.99 £6.39 Sale

Code: PSTR029 PLU: 17746 EAN: 5057645142249 Brand: CMPO Classic Part: No Cylinder Bore Diameter: 57 mm Engine Type: 4-stroke Item Thickness: N/A Items included: Piston Ring Machine Type: Street Motorcycle Manufacturer Part Number: PSTR029 Manufacturer Warranty: 1 year Material: Steel Performance Part: No Pin Diameter: N/A Piston Diameter: 57 mm Reference OE/OEM Number: 121000101 Type: Piston Ring
Description

"We have sold 4 of these in the last month"

Piston rings are critical components in a motorcycle engine, located on the outer surface of the piston. They serve several key functions:

  • Sealing: Piston rings create a seal between the piston and the cylinder wall, preventing the escape of combustion gases into the crankcase and ensuring efficient power generation.
  • Compression: By sealing the combustion chamber, piston rings help maintain the necessary compression pressure for engine performance.
  • Oil Control: They manage the oil flow between the piston and cylinder wall, ensuring that the correct amount of oil is present for lubrication and reducing oil consumption and emissions.


  • Typically made from high-strength materials like cast iron or steel, piston rings are designed to withstand high temperatures and pressures. Proper maintenance and timely replacement of piston rings are essential for maintaining engine performance, efficiency, and longevity.

    Product Diagrams
    Crankshaft/Piston
    Ref Item Name Price
    1 Crankshaft
    CRS032 x 1
    £59.99 £47.99
    2 13mm Gudgeon Pin
    GDP022 x 1
    £7.99 £6.39
    3 Piston Rings SK157FMI-G for SK125-22, SK125-8
    PSTR029 x 1
    £7.99 £6.39
    4 Gudgeon Pin Clips 13mm
    GPCLP007 x 1
    £1.99 £1.59
    5 Piston SK157FMI-G
    PST032 x 1
    £16.49 £13.19
    6 Balance Shaft Primary Gear
    GRBS005 x 1
    £10.99 £8.79
    8 Primary Drive Gear
    GRPD007 x 1
    £5.49 £4.39
    Compatibility
    Manufacturer Model Diagram
    Kiden Aquarius 125 [KD125-G] View parts diagram
    Aries 125 [KD125-J] View parts diagram
    Pisces 125 [KD125-K] View parts diagram
    Lexmoto Assault 125 EFI [HJ125-J-E4] View parts diagram
    Assault 125 Euro 5 [HJ125-J-E5] View parts diagram
    Assault 125 [HJ125-J] View parts diagram
    Isca 125 Euro 5 [SK125-L-E5] View parts diagram
    Isca 125 [SK125-L] View parts diagram
    Oregon 125 [HJ125-K] View parts diagram
    Venom 125 [SK125-22] View parts diagram
    Venom EFI [SK125-22-E4] View parts diagram
    Venom SE 125 [SK125-22S] View parts diagram
    Viper 125 [SK125-22A] View parts diagram
    ZSA 125 [FT125-17C] View parts diagram
    ZSB 125 EFI [SK125-8-E4] View parts diagram
    ZSB 125 Euro 5 [SK125-8-E5] View parts diagram
    ZSB 125 [SK125-8] View parts diagram
    Romet Division 125 [SK125-22 (ROMET)]
    Soft Chopper 2 [SOFTCHOPPER2]
    Zontes Firefly 125 [FIREFLY]
    Javelin 125I [JAVELIN125]
    Mantis 125 [MANTIS125]
    Rocketman 125I [ROCKETMAN125]
    Scorpion 125I [SCORPION125]
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