The following are things I'd like to recommend checking which could be causing start problems :
Here are a couple of tips and suggestions for resolving any starting issues.
1. Check the wiring
From CDI to engine :
Blue to Blue
Black to Black
From Kill switch (If one yellow with red strip, and one green wire is present):
Yellow to Blue and Blue Wire connections
Green to Black and Black Wire connections
***Important note: The white wire from the engine must be left disconnected. It is recommended that this wire be tucked back into the engine, and safely covered with electrical tape to prevent it from coming in contact with the frame of the bike.
Have the choke set about halfway for starters. If it still doesn't start, move the choke lever closer to the top (off), and then start moving it lower. You will need to be at a speed of about 10-15km/hr before releasing the clutch.
3. Spark Plug
Ensure that the spark plug cap is correctly fitted to the top of the spark plug. Remove the crown (the bronze cap) at the end of spark plug to make sure it securely fits.
4. Make sure that there's enough gas in the tank. Start with a gas to oil mixture ratio of 16:1 for the first 500km of use or first 3-4 weeks. Then move to a ratio of 20:1 .
5. Check the carburetor to ensure that it's been connected properly.
6. If there is still no spark, I would recommend changing the spark plug. The following spark plug can be used with the motor :
7. Check the spark plug gap and that it is 0.028 - 0.032 of an inch.
8. Press the TICKLER button on the carburetor down until a little bit of gas drips out of from the air filter. Once you see some air bubbles escaping out from the carburetor down the gas line into the tank, it means that it's almost ready. As soon as you see some gas drip out, take your finger off the button and dry any gas spilling with a paper towel.
* You will need to press the tickler button down before you start riding the bike if it has been over 3-5 hours since the last time you've ridden it. This will normally help the engine starting up right away.
Just a note regarding to the kill switch wire. There is no polarity on the kill switch you can use either of them on blue or black wire. Kill switch is just a contact point to shorted out the spark thus stop the engine.
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