Spark Problems

Nerevar · #1 02-11-2009, 06:13 PM

I recently determined my CDI [I]and[I] magneto were bad so I replaced both. Now with the replacement parts installed I only have spark with the plug out while i'm holding the plug...

which shocks me mind you... HELP PLEASE!!!

biken stins · #2 02-12-2009, 01:26 AM

If your getting bit when it's out, should mean it is sparking in engine. Did you change plug and wire ? Wire may have a break in it when positioned different. Is is getting fuel. What kind of engine ?
Hang in there.

spad4me · #3 02-12-2009, 10:50 AM

How did you determine the cdi was bad?
Do not allow the plug to spark ungrounded.
With the sparkplug wire connected to the plug. Firmly press the threaded part to the bare metal cooling fin while watching the spark plugs GAP. Now let the clutch out. Gently push the bike forward. Did you see a spark??? Keep trying until you either see a spark or you are sure you did NOT .
You will probably wind up buying another cdi.

Pablo · #4 02-12-2009, 01:12 PM

What plug and wire?

Nerevar · #5 02-12-2009, 09:07 PM

Quote:

Originally Posted by biken stins

If your getting bit when it's out, should mean it is sparking in engine. Did you change plug and wire ? Wire may have a break in it when positioned different. Is is getting fuel. What kind of engine ?
Hang in there.

Yeah i purchased a high performance plug and wire. It is getting fuel... I can smell it when i push the bike with the plug out. It is an 80cc Chinese engine from BoyGoFast.

Nerevar · #6 02-12-2009, 09:12 PM

Quote:

Originally Posted by spad4me

How did you determine the cdi was bad?
Do not allow the plug to spark ungrounded.
With the sparkplug wire connected to the plug. Firmly press the threaded part to the bare metal cooling fin while watching the spark plugs GAP. Now let the clutch out. Gently push the bike forward. Did you see a spark??? Keep trying until you either see a spark or you are sure you did NOT .
You will probably wind up buying another cdi.

I tested the CDI and magneto with a meter and compared them with readings people got on this forum. I got open for all readings concerning the blue wire on both the CDI and magneto. Which would mean that they're both bad. I got back from work late today so I was unable to try your idea. If I don't get a spark does that mean the brand new CDI is bad? When it sparks while i'm touching the threaded part of the plug, my left hand which is holding the handlebar sometimes also gets shocked. I'm puzzled. I have the black wire of the magneto on the lower left screw that holds it in... is that correct?

toytime · #7 02-12-2009, 09:29 PM

Seeing as you have the same problem as you began with, I would be asking myself if it was something else right from the start. Wiring?

**Bikeguy Joe** · #8 02-13-2009, 11:23 AM

If you are getting spark while grounding yourself to the bike, you are getting spark while the plug is screwed in.....

Nerevar · #9 02-14-2009, 03:50 PM

Thanks for the help everyone I finally got it up and running yesterday. Only thing now is it runs kinda rough at full throttle - seems like it bogs down. Any ideas?

**Norman** · #10 02-14-2009, 05:57 PM

is it running a little rich? mainjet size might be too big.