no spark on 49cc pocket bike

5237 Views 8 Replies 4 Participants Last post by CAM2, Aug 27, 2012

oldtimernow

Discussion Starter · Aug 17, 2012

Pic this bike up as someone was tossing it. They said they could make the chain stay on, and had trouble starting. I thought it would be a trill for my 6 year old grandkid. I gave it a look and found the bearings shot and I couldnt start it. Drained gas and premix oil&gas of course, Trying to see if I had a spark, I think I might of blown coil. Got a new one, set it .020 inch from magnetic flywheel. With spartplug in wire and grounded plug base to motor, I still have no spark, even with ac meter across plug I read 0 voltage when turning over with low rpm electric drill in clockwise direction. Could any one help. Not sure of make or model, judge cc by coil replacement seems right. There are no extra on bike-No battery lights only a kill switch on bar which I checked ok with meter

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CAM2

· #2 · Aug 17, 2012

Try disconnecting the killswitch and replacing the sparkplug............

If you could start a free photobucket account and post a pic of the bike and the coil youll get a positive ID on model and a solution for the fix.............

Welcome to the planet and good luck with your bike.........

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Dellis-rech

· #3 · Aug 20, 2012

Right know I have a 49cc 2 stroke bike I'm trying to fix replaced the carb and brand new spark plug but still only have a weak spark I can see it but it's not very large wondering if you think that could be the problem how big does your spark need to be

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CAM2

· #4 · Aug 20, 2012

Dellis-rech said:
Right know I have a 49cc 2 stroke bike I'm trying to fix replaced the carb and brand new spark plug but still only have a weak spark I can see it but it's not very large wondering if you think that could be the problem how big does your spark need to be

The spark has to be strong enough to jump a 1/2"-3/4" gap between the plug tip and a solid grounding spot and be clearly visible aswell as audible[crackle]

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EPR

· #5 · Aug 21, 2012

Oldtimer, does your bike look like one of these? These bike are not toys, way to fast for a 6 year old.

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oldtimernow

Discussion Starter · #6 · Aug 22, 2012

No, mine has these fat tires but less framework than the top photo and sure less of a bike than the bottom photos. Wish this could be further up in my priority list, but I'm too busy with other things. THANKS

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EPR

· #7 · Aug 23, 2012 (Edited)

It might be an X7 bike or something. Or it could be missing body work. Cag rims are 6.5" and X7 is 8" so check it out. My Avatar bike is a custom one I built, Lucky 7 frame, C1 water cooled bike front forks and a 54cc, 5 port cylinder billet head highly modded engine.