Checking The Piston And Piston Pin - Yamaha MZ250 Service Manual

PISTON, CAMSHAFT, CRANKCASE, AND
P
a
CRANKSHAFT

CHECKING THE PISTON AND PISTON PIN

1. Measure:
9 Piston skirt diameter P
a = 10 mm (0.4 in) from the piston
bottom edge
Out of specification → Replace.
Piston skirt diameter:
307-001
Limit:
2. Measure:
9 Piston clearance
Out of specifications → Rebore or
replace the cylinder, and then replace
the piston and piston rings.
Piston clearance =
Cylinder inside diameter –
Piston skirt diameter
Piston clearance:
Limit:
3-39
ENG
Refer to "SPECIFICATIONS" in
the Supplementary service
manual.
Refer to "SPECIFICATIONS" in
the Supplementary service
manual.
Refer to "SPECIFICATIONS" in
the Supplementary service
manual.
Refer to "SPECIFICATIONS" in
the Supplementary service
manual.