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General inspection & repair
Spark plug
Check and replace
1. Disconnect the spark plug cap from the spark plug.
2. Clean any dirt from around the spark plug base. Remove the spark plug by using the plug wrench.
3. Inspect the electrodes for erosion or carbon deposit. If the erosion or deposit is heavy, replace
the plug. If there is small carbon deposit, clean carbon deposit with a plug cleaner or use a wire
brush.
4. Check the spark plug gap using a wire-type feeler gauge. The spark plug gap should be 0.6-0.7mm. If adjustment is required, bend the side
electrode carefully. Make sure the plug washer is in good condition.
5. With the plug washer attached, tighten the sparkplug initially by hand to prevent cross threading and then tighten it by spark plug wrench.
6. Reconnect the spark plug cap.
Clean the air cleaner
At least once after every 4000Km, clean and immerse the air cleaner element into engine oil. If you drive your motorcycle in a dusty condition,
more frequent cleaning will be required.
Carburetor idle speed adjustment
Start up the engine and let the engine run until it warms up fully. After engine has warmed up, close the throttle and turn the idle speed adjuster
screw clockwise or anti-clockwise so that the engine may run at 1500r/min. The idle speed increases when the bolt is turned clockwise and the
idle speed decreases when the bolt is turned anti-clockwise. Idle speed of the carburetor should always be optimum. If the idle speed is not
appropriate, make sure to adjust the idle speed bolt once again.
0.6-0.7 mm
Summary of Contents for RY-125PRO
Page 1: ...Pro125 RY 125PRO USER manual...
Page 21: ...18 Electrical circuit diagram...
