Checking The Main Switch; Spark Plug - Yamaha JT1 Series Service Manual

ELECTRICAL SYSTEM-Battery, checking the main switch, Spark plug
5-9 Checking the Main Switch (removed from the chassis} - JT2
Key "O" position
B-B.Nv
B
B/W R
s,
L/W
G
w
G/R
y
L
Key "l" Position
R-Br
OFF
G-W
I
Key"]]" Position
R-Br
JI
Br-L/W
R-L/W
W-G/R
Y-L
R
w
B,
L
'---L____=:]
L/WLlY
G/R - - G
B - - B / W
NOTE -Models JTl, JT2M equipped with "Kill Button" only.
Model
JTll
equipped with handlebar light switch.
Pocket tester
l~l
@l+l
~
@11@
(Switch on the tester
and use an ohmmeter)
If the readings or the above eight measurements are nearly
on,
and no short•circuit is noticed
between the terminals, as well as betv-,1een the lead terminal and the switch body, the main
switch is in good condition.
5-10 Spark Plug
The
nte
of a plug and its discoloring very, according to the habits of the rider. At each periodic
inspection, replace burned or fouled plugs with suitable ones determined by the color and
condition of the bad plugs. One machine may be ridden only in urban areas at low speeds,
whereas another may be ridden for hours at high speeds, so confirm what the present plugs
indicate by asking the rider how long and how fast he rides, and recommend a hot, standard, or
cold plug accordingly. It is actually economical to install new plugs every 3,000 km (2,000
miles) since it will tend to keep the engine in good condition and prevent excessive fuel
consumption.
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