Questions on Reading the sparkplug and DC CDI By new2scooters (Read 455 times)

[new2scooters]

Greetings, I now have slightly over 500 miles on the Rowdy and have it apart for some maintenance. I put new 1500 rpm springs in the clutch and installed a 1500 clutch torque spring. I also installed an audible "beeper" on the turn signal flasher. I pulled the plug to check it and it appears almost too clean.....as in lean. Should I be concerned it is running this lean? Originally it started hard but I have never had a problem with it after the initial tank of Seafoam was run through. That seemed to clear up the hard starting.....

My other questions concern the CDI and the coil. I'd like to have a spare on hand. I still have a new coil from my 50cc project. Does the 150cc take the same part? Also, can you tell by my photo if the CDI is a DC unit or AC unit or do I need to trace the wiring, etc...Thanks Bill

[beachbum]

Here is a chart to check on your plug.

www.ngksparkplugs.com/tech_support/spark_plugs/faqs/faqread.asp

[Alleyoop]

The plug looks sooty to me actually a little rich.

As for the CDI it looks like a DC CDI,
Usually the DC CDIs only have one wire on the TWO PLUG if a AC CDI there are usually TWO wires one for the KILLSWITCH the top wire on the 2 plug.

To positively be sure, take a volt meter or 12v Light Tester TURN THE KEY TO ON and TOUCH that BLACK WIRE on the 2 Plug, if it registers 12v with the meter or if the LIGHT TESTER lights that is a DC CDI.
Alleyoop

[new2scooters]

Feb 18, 2013 19:27:36 GMT -6 Alleyoop said:

As for the CDI it looks like a DC CDI,
Usually the DC CDIs only have one wire on the TWO PLUG if a AC CDI there are usually TWO wires one for the KILLSWITCH the top wire on the 2 plug.

To positively be sure, take a volt meter or 12v Light Tester TURN THE KEY TO ON and TOUCH that BLACK WIRE on the 2 Plug, if it registers 12v with the meter or if the LIGHT TESTER lights that is a DC CDI.
Alleyoop

Thanks so much for the info. I will check it as soon as I get the battery box/battery back in the scoot.
Bill