Cylinder - Yamaha JT1 Series Service Manual

ENGINE·
Cylinder
3-3 Cylinder
A 1) Remove the cylinder by striking it lightly
with a soft faced hammer.
2) Always replace the cylinder base gasket
when reassembling.
Fig 3-3-1
Fig 3-3-2
8 Checking the Cylinder for Wear
1) Measure the amount of wear of the cylinder wall with a cylinder bore measuring micrometer or cylinder
gauge. (Measure it at four depths while posit1on1ng the instrument parallel. and then at riQht
angles to the crankshaft) If the difference between the maximum and minimum diameter exceeds 0.05 mm.
(0.0019") rebore and hone the cylinder
0
- s -
--
0
0
---------....
a
b
D
- c
1------1'-
d
2) The piston clearance between the piston and the cylinder is 0.040-:-0.045 mm (0.0016"-0.0018")
- 16-