Instead of pulser coils or other thing.. is there some a particular must be CDI sympton?.. any help? 10 points!
2007-10-15 03:46:19 · 4 answers · asked by =) 2 in Cars & Transportation ➔ Motorcycles
What symptoms are you experiencing?
It's sometimes difficult even for a pro with proper tools to diagnose a CDI that's going bad - because it takes a power load to create the problem.
Once they're bad, then yes, it's easy to test!
But they can narrow down the problem by testing the stator, coils, etc. However, this can take time and sometimes be more expensive than the parts they replace.
Usually, if it's a CDI, the bike will start and run okay, but start cutting out and progressively running worse as it gets warmer -- to the point where it won't run at all until it cools down. Once it's cool, you can restart and it'll go through the same cycle again.
These symptoms keep getting worse - shorter period between okay startup and cutting out - and the engine shuts down quicker -- until finally the bike won't start at all.
If these aren't the symptoms you're experiencing, it's most likely NOT the CDI.
2007-10-15 13:06:42 · answer #1 · answered by ducatisti 5 · 0⤊ 0⤋
If the CDI box has input power (AC from magneto, or DC from battery) and a trigger pulse from the trigger coil (usually 1.7 volts AC minimum) then it should have output to the ignition coil, IF NO OUTPUT, CDI is probably bad. To do this diagnosis it would be helpful if you had a wiring diagram and a peak voltage meter. Sometimes it may be worth it to take such problems to a bike shop. Tell the service manager that you would like to have a no spark problem diagnosed, a good mechanic with the propper tools should be able to quickly find the problem keeping the labor cost down and saving you from buying un-needed non-returnable electrical parts.
2007-10-15 17:40:37 · answer #2 · answered by G B 6 · 2⤊ 0⤋
There are lots of symptoms.
Some are the same as when other parts fail.
A big reason pros use a manual.
If everything else is ok, the easiest way to check them is to swap them from one side to the other.
2007-10-15 19:57:49 · answer #3 · answered by Firecracker . 7 · 0⤊ 0⤋
Only a shop manual will know for sure.
http://www.motocom.com/motorcycles/
Even professional mechanics need and use them.
2007-10-15 14:07:26 · answer #4 · answered by guardrailjim 7 · 0⤊ 0⤋