Installation - Yamaha TDM850 1996 Service Manual

CYLINDER AND PISTON
6. Inspect:
S Piston pin
Blue discoloration/Grooves ! Replace, then
inspect lubrication system.
7. Measure:
S Piston pin-to-piston clearance
Measurement steps:
S Measure the piston pin outside diameter a .
If out of specification, replace the piston pin.
Outside diameter (piston pin):
S Measure the piston inside diameter b .
S Calculate the piston pin-to-piston clearance with
following formula:
Piston pin-to-piston clearance =
Bore size (piston pin) b –
Outside diameter (piston pin) a
S If out of specification, replace the piston.
Piston pin-to-piston clearance =

INSTALLATION

1. Install:
S Piston rings
NOTE:
Be sure to install rings so that "T" mark is located
on the upper side of the rings. Oil the pistons and
rings liberally.
4-27
ENG
19.991 X 20.000 mm
<Limit>: 19.975 mm
0.002 X 0.022 mm
<Limit>: 0.07 mm