Yamaha JOGR JOGRR CS50 Owner's Manual download pdf (Page 43)

EAUM1250

Panel A

To remove the panel

1. Open the storage compartment.

(See page 3-11).

2. Remove the screw, and then take

the panel off.

1. Screw

2. Panel A

To install the panel

1. Place the panel in the original

position, and then install the

screw.

2. Close the storage compartment.

EAU19622

Checking the spark plug

The spark plug is an important engine

component, which should be chec-

ked periodically, preferably by a

Yamaha dealer. Since heat and depo-

sits will cause any spark plug to

slowly erode, it should be removed

and checked in accordance with the

periodic maintenance and lubrication

chart. In addition, the condition of the

spark plug can reveal the condition of

the engine.

The porcelain insulator around the

center electrode of the spark plug

should be a medium-to-light tan (the

ideal color when the vehicle is ridden

normally). If the spark plug shows a

distinctly different color, the engine

could be operating improperly. Do not

attempt to diagnose such problems

yourself. Instead, have a Yamaha

dealer check the vehicle.

If the spark plug shows signs of elec-

trode erosion and excessive carbon

or other deposits, it should be repla-

ced.

Before installing a spark plug, the

spark plug gap should be measured

with a wire thickness gauge and, if

necessary, adjusted to specification.

1. Spark plug gap

Clean the surface of the spark plug

gasket and its mating surface, and

then wipe off any grime from the

spark plug threads.

Spark plug gap:

0.6–0.7 mm (0.024–0.028 in)

ZAUM0037

Specified spark plug:

NBR8HS/NGK (for CS50 CS50Z)

BPR4HS/NGK (for CS50M)

PERIODIC MAINTENANCE AND ADJUSTMENT

6-6

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Yamaha JOGR JOGRR CS50 Owner's Manual Page 43

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