Feature

●Application: SR500 (all years) SR400 (carburetor vehicles all years)
●Material: Aluminum
●Specifications: Piston Diameter: 3.5 inches (89 mm); Displacement: 418cc/SR400 522.6cc/SR500; Reference Compression Ratio: .8.5:1/SR400 10.3:1/SR500 (Genuine; Piston Diameter: 87 mm); Displacement: 399cc/SR4000cc/SR5 0)
●[Manufacturing Method] Forged
●Parts Contents:
●Yoshimura piston, piston ring, piston pin
●Circlip / Gasket Set (Head Gasket, Base Gasket)

[Z2]

[SR400 & 500]

Description

The piston is one of the major parts of the source of powerful power, especially in extreme conditions.
At the forefront of compression and explosion progress, it plays an important role in creating powerful power just by yourself. The piston head should not be confused with a part of the combustion chamber.
The piston head should not be confused with a part of the combustion chamber.
Therefore, the head has a small and smooth surface area and provides sufficient compression ratio without interfering with the valve, it can withstand explosive pressure and high heat, good air tight with cylinders, low sliding resistance to cylinders, suitable lubrication, and being lightweight and low heat change.
Yoshimura Original Piston Kits are built to meet those demanding conditions.
Image is for illustration purposes
Cylinder bowling is required to incorporate Yoshimura piston kit. This work is very important, so please ask a trusted factory or shop and adhere to Yoshimuras specified dimensions. In addition, Yoshimura also provides precise bowling service for you. (Bowling is done in Yoshimura chosen reliable factory. )