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Pistons, Pins & Rings Specifications

PISTONS, PINS & RINGS SPECIFICATIONS

Application In. (mm)
Piston Clearance (1) .0008-.0016 (.020-.040)
Pins
Piston Fit (2) Press Fit
Rod Fit (2) Press Fit
Rings
Ring No.1
End Gap (3) .0138-.0260 (.35-.65)
Side Clearance .0015-.0028 (.040-.072)
Ring No. 2
End Gap (3) .0138-.0260 (.35-.65)
Side Clearance .0015-.0028 (.040-.072)
Oil Ring
End Gap .010-.024 (.25-.60)
Side Clearance .0012-.0024 (.030-062)
(1) The B23F engine with piston height of 3.1654"(80.4mm) has clearance of 0.0002-.0003"(.005-.007 mm). B23F engine with piston height of 3.00079"(76.4 mm) has clearance of 0.0004-.0006'(.010-040 mm).
(2) Pin secured with circlip at end. Push fit in piston; light thumb pressure (close running fit) in rod.
(3) Lower compression ring end gap is 0.0138-.0217" 0.35-.55 mm).
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