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Post by quicky on Apr 5, 2012 7:57:13 GMT -6
have a 2007 Tank 150cc with starting issue....seems the spark is very weak....changed the coil, cdi and rectifier....spark still too weak to fire...could it be a stator?
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Post by terrilee on Apr 5, 2012 8:35:45 GMT -6
;D ;D ;D ;D ;D ;D
HI & WELCOME
GLAD TO HAVE U ABOARD.
Now im not a mech
but i know a few things
to answer your question
IMHO it could be 1 of 2 things
the stator/magneto or the pick up coil
NOT COIL--- PICKUP COIL
but before u swap em out
just test em with a VOM.
i dont have a link handy wait i might
naw it disappeared
well someone on here will
give 'em a few hours to wake up lol
and they will post one
good luck
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Post by tvnacman on Apr 5, 2012 8:53:09 GMT -6
Welcome , how do you know you have a weak spark ? What color is the spark ? Can you give us some mpre history on this scooter . How long do you have it , when was the last time it ran roght . How many miles does it have on it and any other work you have done to it .
John
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Post by terrilee on Apr 5, 2012 8:55:22 GMT -6
OMG i am dumb 
its probaly needs a valve adjustment
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Post by tvnacman on Apr 5, 2012 9:25:07 GMT -6
Da da da da daa da da da da .
Not without more info .
John
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Post by justbuggin2 on Apr 5, 2012 18:34:43 GMT -6
have you checked all the grounds is the plug new ? need more info to be able to help
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Post by quicky on Apr 7, 2012 10:30:56 GMT -6
thanks for all of the input....found the green wire(ground) from stator is melted...gotta be a bad body ground and/or starter ground somewhere...hope it doesn't need a complete wiring harness
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Post by tvnacman on Apr 7, 2012 12:07:31 GMT -6
you can fix that wire , then trace the neg battt cable it should goto the frame and the engine . When the main battery/engine ground has a bad connection that little green wire tried to hold the load and burns . This would explain a weak spark . first the main engine ground fails , then when you try to use the starter the little green one cooks.
John
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Junior
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Post by sprocket on Apr 7, 2012 12:09:55 GMT -6
Stator,pick-up coil, high tension lead or the plug boot.. they can all go bad
Check the AC volts on the black and red wire from the stator to the CDi should be 50+ volts AC.. anything less the stator is your problem...
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Post by quicky on Apr 8, 2012 9:17:04 GMT -6
thanx  |
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Post by imnts2 on Apr 9, 2012 7:26:06 GMT -6
Weak spark. What is a weak spark. I spark is more or less- a spark. How do you tell it is weak? These scoots with AC CDI do not have a big fat spark you can hear like DC systems. got a VOM? Check the output stator to the CDI. Should be up around 40V at cranking speed. I don't have time to look it up right now, but it is somewhere in our library here.
good luck
lefty2
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Post by sprocket on Apr 9, 2012 13:37:56 GMT -6
The red/black on a AC type CDI can be anywhere from 50+ volts to 90+volts.. mine is 105Volts...
below 40volts and the spark will be marginal... (weak)
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Post by imnts2 on Apr 9, 2012 16:04:31 GMT -6
Thanks sprocket. I could not remember at the moment , and I had an employee waiting for instructions - so you know how came first.
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