My 49cc quad bike is new wont start have changed the coil and plug but no spark tried diconnecting the kill switch

Hi, I do a lot with these bikes, I think if you are getting a weak spark there is a couple things to check. First, do you understand how it builds the power to create the spark? The magnet in the flywheel has to be very close to the magnito or coil, if the gap is too much it will cause a weak spark, if the magnet is weak, weak spark, if the coil is shorting internally, weak spark. If the plug wire is damaged, weak spark. I hope this helps you.

If you have replaced the spark plug then the possibilities are the ignition coil is weak or the starter mechanism is faulty.

See this site for details of parts.
Mini Atv Quad Parts 47cc 49cc Stock Replacement

My 49cc 2 stroke pull start scooter wont turn over

check the spark plugs, the carb

maybe the switch is not connected properly.

check to see if there is a broken wire

do u have any spark at the spark plug. When the kill switch is faulty it won't give any spark try disconnecting. sometimes this kill switch grounds itself or the contacts stay closed. For it to have sparks contacts should be opened. This kill switch grounds the coil so the engine stops running

my 49cc 2 stroke quad wont start help

if it has a kill switch make sure it is on, check that you are getting spark at the plug and have the right fuel in the motor.
Remove the air filter from the carbi and squirt some 2 stroke fuel directly into the throat of the carbi and try to start it.
hope this helps

I'm not familiar with all quads and all the kill switch locations. Does it have a tip-over kill switch? Is it working? Is the quad in neutral? Is the neutral light on? Many engines will not spark if the neutral light is not on. Are the headlights off when starting?

How good is your battery? A low battery can kill spark. Test for spark by grounding the threads of the plug against the cylinder. Have a friend kick the bike while you watch for spark. Assuming no spark, then check all the kill switches with an Ohmmeter to be sure each switch is working properly. Sometimes a switch goes bad. Try disconnecting all kill switches then check spark.

Check the wiring harness, even under the gas tank and seat. Are all the connectors clean and with a tight connection? Any abraded wires? Check the ignition switch also. The switch can go bad as well. Are the flywheel coils good > is the battery getting a charge?

Still no spark? If CDI then get it checked.
If points then file or replace them along with a new condensor and reset the gap then time the engine. >> I hope this helps.

Please rate this answer. Thanks trsrhntr!