not firing

1040 Views 10 Replies 4 Participants Last post by EPR, Aug 13, 2012

bullchamp13

Discussion Starter · Aug 11, 2012

i have this 125cc super pocket bike
I replaced the coil and it fired up for about 3seconds and quit now when you go to kick it the kick start jerks back up

thanks for the help

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1 - 11 of 11 Posts

CAM2

· #2 · Aug 11, 2012

might be a stator problem,,,could be a valve problem too...both arent too hard to check....

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bullchamp13

Discussion Starter · #3 · Aug 11, 2012

thanks i will check cleaned out carb and gas tank that didnt work but i will try your idea
thanks man

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Sounds like the timing of the stator is off.....i had similar iasues with my gocart (dirtbike engine powered) and i had sheared off the keyway on the rotor....slid enough to advance the timing far enough to make it not run and kick back on the kick start hard enough to almost break your ankle....LOL

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bullchamp13

Discussion Starter · #5 · Aug 11, 2012

Thanks guys, sounds like your right. I have have fuel, spark, and compression and it still wont start.
Checking the stator and valves will be a new venture for me but gonna have to find time to tackle it.
Any suggestions for me since this will be the first time I've dug into a motor to fool with a stator?
Anyone know of a website or book I can get to walk me through it and checking the valves if need be?

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EPR

· #6 · Aug 11, 2012

You don't need to take the stator off, you check the wires with a voltmeter first to see if it's good.

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bullchamp13

Discussion Starter · #7 · Aug 11, 2012 (Edited)

Thanks EPR. I checked the stator like you said and it is good. I think boogieoy has a good idea. I will check the flywheel and see if it the keyway has sheered.

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EPR

· #8 · Aug 12, 2012

I have never heard of a 4 stroke engine, that the magnets broke the key & jumped on the shaft.

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bogieboy

· #9 · Aug 12, 2012

EPR said:
I have never heard of a 4 stroke engine, that the magnets broke the key & jumped on the shaft.

i had a keyway shear on my honda......had to get a new key for it...LOL that was last year...

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CAM2

· #10 · Aug 12, 2012

bullchamp13 said:
Thanks guys, sounds like your right. I have have fuel, spark, and compression and it still wont start.
Checking the stator and valves will be a new venture for me but gonna have to find time to tackle it.
Any suggestions for me since this will be the first time I've dug into a motor to fool with a stator?
Anyone know of a website or book I can get to walk me through it and checking the valves if need be?

Changing out a stator is a 30 min job max............

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EPR

· #11 · Aug 13, 2012

Remind me to never let you ride my bikes,lol,lol.

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