Start at the battery Postive terminal. Use a digital volt meter. Check the wire from connection to connection. At a connection, check going into the connection, and directly out of the connection.
You can get a digital volt meter at walmart for less than $10... for $15 you can get a pretty awesome one in a kit with extras.
By starting at the positive terminal and going from there, you will see every step down point that the voltage takes.
It's going to basically run from the battery, to the ignition switch, back to the CDI, out of the cdi to the coils.
If you see the battery is putting out 13.4v on the digital display for example, then put the tester probe on the wire of the connector to the battery. If you see anything less than 13.4... that's one spot your loosing V. Clean the connection to improve the issue.
Move to the next end of the wire... that is probably going to be the red on the connection under the tank for the ignition switch. Check power going into the connector (red wire). If it's lower than the prior point checked, by any significant amount, you will need to inspect the full run of the wire to see if there is damaged/burned spots. This may mean you unwrap the old electrical tape or plastic that has it bundled up. Repair any issues if they are major.
The primary reason I suggest a digital meter is because you can see minor drops alot better. While .2v isn't much of a drop in a single location, if your checking 20 spots and they all vary .2-.3v drop... well.. simple math means your going to end up with a pretty significant total drop in the end.
Continue on with your tracing ... remember at every connection point to check BOTH in and out at the connection. If the connection is not good, that can cause a major drop.
Krey
You can get a digital volt meter at walmart for less than $10... for $15 you can get a pretty awesome one in a kit with extras.
By starting at the positive terminal and going from there, you will see every step down point that the voltage takes.
It's going to basically run from the battery, to the ignition switch, back to the CDI, out of the cdi to the coils.
If you see the battery is putting out 13.4v on the digital display for example, then put the tester probe on the wire of the connector to the battery. If you see anything less than 13.4... that's one spot your loosing V. Clean the connection to improve the issue.
Move to the next end of the wire... that is probably going to be the red on the connection under the tank for the ignition switch. Check power going into the connector (red wire). If it's lower than the prior point checked, by any significant amount, you will need to inspect the full run of the wire to see if there is damaged/burned spots. This may mean you unwrap the old electrical tape or plastic that has it bundled up. Repair any issues if they are major.
The primary reason I suggest a digital meter is because you can see minor drops alot better. While .2v isn't much of a drop in a single location, if your checking 20 spots and they all vary .2-.3v drop... well.. simple math means your going to end up with a pretty significant total drop in the end.
Continue on with your tracing ... remember at every connection point to check BOTH in and out at the connection. If the connection is not good, that can cause a major drop.
Krey
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