2-22 PERIODIC MAINTENANCE
COMPRESSION PRESSURE CHECK
The compression pressure reading of a cylinder is a good indicator of its internal condition.
The decision to overhaul the cylinder is often based on the results of a compression test. Periodic mainte-
nance records kept at your dealership shoud include compression readings for each maintenance service.
CONPRESSION PRESSURE SPECIFICATION
Low compression pressure can indicate any of the following conditions:
* Excessively worn cylinder walls
* Worn piston or piston rings
* Piston rings stuck in grooves
* Poor valve seating
* Ruptured or otherwise defective cylinder head gasket
NOTE:
When the compression pressure goes below specification, check the engine for conditions listed above.
COMPRESSION TEST PROCEDURE
NOTE:
* Before testing the engine for compression pressure, make
sure that the cylinder head nuts are tightened to the specified
torque values and the valves are properly adjusted.
* Warm up the engine before testing.
Remove the related parts and test the compression pressure in
the following manner.
• Remove the spark plug. (
!
2-7)
• Install the compression gauge and adaptor in the spark plug
hole. Make sure that the connection is tight.
• Keep the throttle lever in the fully open position.
• Press the starter button and crank the engine for a few sec-
onds.
• Record the maximum gauge reading as the cylinder compres-
sion.
#
09915-64510: Compression gauge set
09915-63310: Adaptor
Standard
Limit
1 200 – 1 600 kPa
1 000 kPa
12 – 16 kgf-cm
2
171 – 228 psi
10 kgf-cm
2
142 psi
Содержание DR 125
Страница 1: ...DR Z125 L 9 9 5 0 0 4 1 1 2 5 0 1 E...
Страница 34: ...PERIODIC MAINTENANCE 2 21...
Страница 167: ...SERVICING INFORMATION 7 9 WIRING DIAGRAM...
Страница 169: ...SERVICING INFORMATION 7 11 Generator lead wire 5 N m 0 5 kgf m 3 7 lb ft 55 N m 5 5 kgf m 40 lb ft 90...
Страница 173: ...SERVICING INFORMATION 7 15 55 N m 5 5 kgf m 40 0 lb ft 50 N m 5 0 kgf m 36 0 lb ft SIDE STAND SET UP...
Страница 221: ...Prepared by 6th Ed May 2008 May 2008 1st Ed March 2002 Part No 99500 41125 01E Printed in Japan 228...
Страница 222: ...Printed in Japan K3 K4 K5 K6 K7 K8...