PERIODIC MAINTENANCE AND MINOR REPAIR
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To check the spark plug
1. Check that the porcelain insulator
around the center electrode of the
spark plug is a medium-to-light tan
(the ideal color when the vehicle is
ridden normally).
NOTE:
If the spark plug shows a distinctly dif-
ferent color, the engine could be defec-
tive. Do not attempt to diagnose such
problems yourself. Instead, have a
Yamaha dealer check the vehicle.
2. Check the spark plug for electrode
erosion and excessive carbon or
other deposits, and replace it if
necessary.
To install the spark plug
1. Measure the spark plug gap with a
wire thickness gauge and, if nec-
essary, adjust the gap to specifica-
tion.
2. Clean the surface of the spark plug
gasket and its mating surface, and
then wipe off any grime from the
spark plug threads.
3. Install the spark plug with the
spark plug wrench, and then tight-
en it to the specified torque.
NOTE:
If a torque wrench is not available when
installing a spark plug, a good estimate
of the correct torque is 1/4–1/2 turn
past finger tight. However, the spark
plug should be tightened to the speci-
fied torque as soon as possible.
4. Install the spark plug cap.
1. Spark plug wrench
1
Specified spark plug:
NGK/BPR7HS
1. Spark plug gap
Spark plug gap:
0.6–0.7 mm (0.024–0.028 in)
1
Tightening torque:
Spark plug:
20 Nm (2.0 m·kgf, 14 ft·lbf)
Summary of Contents for VINO YJ50RT
Page 1: ...OWNER S MANUAL 5LY 28199 15 YJ50RAT LIT 11626 18 26 YJ50RT ...
Page 2: ...5LY 9 15_hyoushi2 3 3 30 04 3 02 PM Page 1 ...
Page 12: ...1 6 EAU10381 y before operating this vehicle 4 5 ...
Page 14: ...2 1 EAU10410 3 4 5 6 7 ...
Page 15: ...DESCRIPTION 2 2 2 3 4 5 6 7 8 9 EAU10420 5 4 7 3 6 ...
Page 16: ...2 3 EAU10430 3 4 5 6 7 8 ...
Page 29: ...PRE OPERATION CHECKS 4 3 2 3 4 5 6 7 8 9 y CHECKS PAGE ...
Page 34: ...NT RIDING POINTS 5 5 ...
Page 35: ...6 1 2 3 4 5 6 7 8 9 ODIC MAINTENANCE AND MINOR REPAIR ...
Page 38: ...ND MINOR REPAIR 6 4 EAU18690 e riding in unusually wet or dusty areas ...
Page 59: ...CONSUMER INFORMATION 9 2 2 3 4 5 6 7 8 9 ...
Page 62: ...9 5 EAU26680 S A RIVA LIMITED WARRANTY ...