Checking Ignition Timing - Yamaha YT175J 1982 Service Manual

1. To check, warm up the engine for 2 - 3
minutes. Place the machine upright and
remove the oil level checking bolt. If oil
flows out, the oil level is correct. The
transmission oil should be drained and
refilled every 6 months.
1. Checking bolt
Checking ignition timing
1. Ignition timing is checked with timing
light by observing the position of the
stationary pointer marked on the
crankcase and the marks on the
flywheel magneto.
1. Mark 2. Stationary pointer 3. Timing light
2. Remove the crankcase cover (Ll.
3. Connect the timing light to the spark
plug lead wire.
4. Start the engine and keep it running at
the specified speed. Use a tachometer
for checking.
Specified engine speed: 1,600 ± 50 r / min
2-7
5. While running the engine at the
specified speed, check to see that the
stationary pointer is aligned with the
magneto center mark. If the marks are
out of alignment, check the woodruff
key for damage and/or crankshaft for
damage.