Operations Manual
HKS 700E
23
7.5. Spark plugs
• Unscrew the plugs only with a cold engine.
• Brush clean with a plastic bristle brush.
• Do not use a brass brush or a steel wire brush for cleaning.
• After 200 hours, replacement of the spark plugs is required.
• Spark plug to use: HKS SUPER FIRE RACING
• Torque the spark plugs with a cold engine only. (See Chapter 9.)
The shade of the spark plugs can give you the following information:
• Light brown to white:
Spark plugs and carburetor adjustment is correct.
• Velvety black:
Electrode gap too wide or the mixture is too rich.
Reduced air intake (air filter dirty) the proper exhaust gas temperature of
engine is not reached
• Oily:
The spark plug is not firing or worn cylinder and piston rings.
• Pearly or glazed:
Wrong type of spark plug or the Spark plug not torqued properly, the
mixture is a too lean or badly closing valve.
7.6. Exhaust system
• Visually check for any damage and or leaks.
• Check attach-flanges at exhaust parts on cylinder. Tighten the nuts if
necessary.
7.7. Misc. bolts and nuts
• Check for tightness, re-torque if necessary (See chapter 9.)
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