Yamaha TDM850 1996 User Manual

Name: Yamaha TDM850 1996
Brand: Yamaha
Rating: 5 (1 reviews)

332 pages

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4-27

CYLINDER AND PISTON

ENG

NOTE:

6. Inspect:

 Piston pin

Blue discoloration/Grooves  Replace, then

inspect lubrication system.

7. Measure:

 Piston pin-to-piston clearance

Measurement steps:

 Measure the piston pin outside diameter

If out of specification, replace the piston pin.

Outside diameter (piston pin):

19.991 X 20.000 mm

<Limit>: 19.975 mm

 Measure the piston inside diameter

 Calculate the piston pin-to-piston clearance with

following formula:

Piston pin-to-piston clearance =

Bore size (piston pin)

b –

Outside diameter (piston pin)

 If out of specification, replace the piston.

Piston pin-to-piston clearance =

0.002 X 0.022 mm

<Limit>: 0.07 mm

INSTALLATION

1. Install:

 Piston rings

Be sure to install rings so that “T” mark is located

on the upper side of the rings. Oil the pistons and

rings liberally.

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