Kawasaki J300 - Owner's Manual > Spark Plug, Coolant, Air Cleaner
If the plug is oily or has carbon built up on it, clean it. The plug may also be cleaned using a high flash-point solvent and a non-metal brush (nylon etc.).
Measure the gap with a wire-type thickness gauge, and adjust the gap if incorrect by bending the outer electrode.
If the spark plug electrodes are corroded or damaged, or if the insulator is cracked, replace the plug. Use the standard plug.
Spark Plug Removal and Installation
- Carefully pull the spark plug cap from the spark plug.
- Spark Plug Cap
- Spark Plug
- Exhaust Pipe
- Unscrew the spark plug using the spark plug wrench included in the supplied tool kit.
- Spark plug installation is performed in the reverse order of removal.
- If a torque wrench is not available, this item should be serviced by an authorized Kawasaki dealer.
- Fit the plug cap securely onto the spark plug, and pull the cap lightly to make sure that it is properly installed.
- Check the spark plug lead is not damaged, or correctly routed.
- 0.7 ~ 0.8 mm (0.028 ~ 0.031 in.)
Coolant Level Inspection
- Position the motorcycle so that it is perpendicular to the ground.
- Check the coolant level through the coolant level gauge on the reserve tank located in the left side of the inner cover. The coolant level should be between the F (Full) and L (Low) level lines.
- F (Full) Level Line
- L (Low) Level Line
- Reserve Tank
- Check the level when the engine is cold (room or atmospheric temperature)
- If the amount of coolant is insufficient, add coolant into the reserve tank.
- Remove the screw, and remove the cover.
- Remove the cap from the reserve tank and add coolant through the filler opening to the F (Full) level line.
- Reserve Tank Cap
- In an emergency you can add water alone to the coolant reserve tank, however it must be returned to the correct mixture ratio by the addition of antifreeze concentrate as soon as possible.
If coolant must be added often, or the reserve tank completely runs dry, there is probably leakage in the system. Have the cooling system inspected by your authorized Kawasaki dealer.
- Install the reserve tank cap.
- Install the cover.
Have the coolant changed by an authorized Kawasaki dealer.
Coolant containing corrosion inhibitors for aluminum engines and radiators include harmful chemicals for human body. Drinking coolant can result in serious injury or death. Use coolant in accordance with the instructions of the manufacturer.
Use a permanent type of antifreeze (soft water and ethylene glycol plus corrosion and rust inhibitor chemicals for aluminum engines and radiators) in the cooling system. On the mixture ratio of coolant, choose the suitable one referring to the relation between freezing point and strength directed on the container.
If hard water is used in the system, it causes scale accumulation in the water passages, and considerably reduces the efficiency of the cooling system.
- A permanent type of antifreeze is installed in the cooling system when shipped. It is mixed at 50% and has the freezing point of -35ºC (-31ºF).
This motorcycle's air cleaner element consists of a wet paper filter, which cannot be cleaned.
- Remove the screws, and remove the air cleaner cover.
- Air Cleaner Cover
- Remove the bolts, remove the air cleaner element.
- Air Cleaner Element
- Put a clean, lint-free towel over the air cleaner housing ducts to keep dirt or other foreign material from entering.
If dirt or dust is allowed to pass through into the throttle body assembly, the throttle may become stuck, possibly causing accident.
Be sure to keep the dust from entering during cleaning.
If dirt gets through into the engine, excessive engine wear and possibly engine damage will occur.
- Replace the air cleaner element with a new one.
- The element and removed part installation is performed in the reverse order of removal.
Oil Level Inspection If the engine is cold, start the engine and run it for several minutes at idle speed. Stop the engine, then wait several minutes until the oil settles.
Throttle Grip Throttle Grip Free Play Inspection Check that the throttle grip moves smoothly from full open to close, and the throttle closes quickly and completely by the return spring in all steering positions. If the throttle grip does not return properly, have the throttle control system checked by an authorized Kawasaki dealer. Check the throttle grip free play by turning back and forth. Throttle Grip Throttle Grip Play