I have a 1979 JD Trailfire 440 sled for sale bought it last winter with the intentions of fixin it up, but came to find I don't have next winter to use it. It first came none running with no spark got it running last winter with a new CDI box and then came to find out the gas tank hose gromet was sh...

Checked out all the connections and found them good along with all the other electrical items and have determined the cdi box is bad. So then it comes about it that I ask is there anyone who knows the 1979 cdi trailfire part number for it and also if anyone knows where i can get a cheap reliable cdi...

Hey does any one out there know how to test a CDI box off a 1979 trailfire to see if it is good or bad. Appreciate it if I could get the ohm rating on it, but if there is other tests out there i'm open to suggestions.

Thank you for the info but still no spark. I still need the CDI box ohm rating and how to test it if there are any tests out there to figure out if it is good or bad. This is what i have left to test is the CDI box. Also where is this engine wiring harness located and what does it look like.

Thank you for the info that you provided, but i've already gone through and looked on the site and its sources and didn't find the info that im lookin for. What i need is ratings for the multimeter that i have and they don't have that info, but thanks.

Hello I have a 1979 Trailfire that has lost its spark and i'm trying to trouble shoot it. The information that i'm lookin for is what to ohm the cdi box and the coil out at for the sled. If there is anyone who has this info it would be very helpful if i could get the ohm ratings for them.