SPARK PLUGS FOR BONNEVILLE ENGINES
The 347 model Bonnevilles were equipped with Indian “C” spark plugs for normal or average motor operation. However, these spark plugs may not stand up under high speed and severe service on long trips.
When it is found that Bonneville engines equipped with “C” plugs do not perform as they should at top speed,
or when they do not reach the top speed that is expected of them, you should try a “colder” plug.
The Indian “D” usually is found to be satisfactory, however it may be necessary to install 59T or Champion
JA-11 spark plugs to take care of unusual conditions.
The Indian “D” is used in “hot” motors, such as the Savannah, Daytona and Bonneville models, especially when
they are operated at high speed.
The Indian 59T and Champion JA-11 plugs are used in racing engines, and in Savannah, Daytona and Bonneville
road machines that are ridden at continuous high speeds. These spark plugs are classified next to the Indian “D”
in the heat range as “colder” plugs.
FITTING CLUTCH SPROCKET NUT WRENCH NO. 27-T-350
The compactness of the Indian 74, Standard Scout and 101 model transmissions makes it difficult to get a
good hold on the clutch sprocket nut when tightening, even when using the Special Wrench No. 27-T-350 for
this nut.
A more firm grip on this nut can be obtained by relieving Wrench No. 27-T-350 at the heel, as shown in
the illustration below.
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