STARTING AND BREAK-IN

GEN INFO

BREAK-IN PROCEDURES

1.Before starting the engine, fill the fuel tank with the fuel.

2.Perform the pre-operation checks on the machine.

3.Start and warm up the engine. Check the idle speed, and check the operation of the controls and the “ENGINE STOP” button. Then, restart the engine and check its operation within no more than 5 minutes after it is restarted.

4.Operate the machine in the lower gears at moderate throttle openings for five to eight minutes.

5.Check how the engine runs when the machine is ridden with the throttle 1/4 to 1/2 open (low to medium speed) for about one hour.

6.Restart the engine and check the opera- tion of the machine throughout its entire operating range. Restart the machine and operate it for about 10 to 15 more minutes. The machine will now be ready to race.

CAUTION:

After the break-in or before each race, you must check the entire machine for loose fittings and fasteners as per “TORQUE-CHECK POINTS”.

Tighten all such fasteners as required.

When any of the following parts have been replaced, they must be broken in.

CYLINDER AND CRANKSHAFT:

About one hour of break-in operation is necessary.

PISTON, RING, VALVES, CAMSHAFTS AND GEARS:

These parts require about 30 minutes of break-in operation at half-throttle or less. Observe the condition of the engine care- fully during operation.

1 - 18

Page 34
Image 34
Yamaha WR45OFR BREAK-IN Procedures, Cylinder and Crankshaft, About one hour of break-in operation is necessary