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

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4-24

CYLINDER AND PISTON

ENG

NOTE:

CAUTION:

NOTE:

REMOVAL

1. Remove:

 Piston circlips

 Piston pins

 Pistons

 Before removing the piston pin clip, cover the

crankcase with a clean rag to prevent the piston

pin clip from falling into the crankcase cavity.

 Put identification marks on each piston head for

reference during reinstallation.

 Before removing the piston pin, deburr the clip

groove and pin hole area. If the piston pin groove

is deburred and piston pin is still difficult to re-

move, use the piston pin puller

Piston pin puller:

90890-01304

Do not use a hammer to drive the piston pin

out.

INSPECTION

1. Inspect:

 Cylinder and piston walls

Vertical scratches  Rebore or replace cylin-

der and piston.

2. Measure:

 Piston-to-cylinder clearance

Measurement steps:

1st step:

 Measure the cylinder bore “C” with a cylinder

bore gauge.

Measure the cylinder bore “C” in parallel to and at

right angles to the crankshaft. Then, find the aver-

age of the measurements.

Questions and Answers:

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Yamaha TDM850 1996 Specifications

General