Welcome to the forum. You've come to the right place for help and advice.
You can get a new plug wire and boot from any auto parts, motorcycle or lawnmower shop. We recommend a solid core (metallic) or a high performance resistance plug wire and a good quality plug boot. The wire simply screws into the CDI, the small black plastic box. Righty tighty, lefty loosy. A 7mm wire will go right in but you'll need to trim anything larger diameter.
By the way...how old is the grandson? Keep in mind that these are not toys and are capable of speeds in the 30mph range. Not a good choice for a very youngster.
Have fun and don't hesitate to ask if we can help you get on the road.
Tom
Thanks for the so quick replys. Duh-h-h, when I read these posts, I put on my glasses and looked closely at the end of the plug wire and the boot cap. Sure enough, a tiny little screw thread. I just screwed the plug boot back on the end of the wire, and Zoomo! It still didn't start. So I came back on the forum and looked at some other problems like one I didn't feel right about, connecting the throttle linkage to the carb. Found another set of pictures that included that little step, (which was missing from the instructions at the link provided with my kit. Oh Happy Day, it cranked right up, I rode it around 10 blocks 5 times, and I am a happy camper!!! The kid will get an operable Christmas present! Thanks to all you folks, without whom I would still be banging my head on the floor over some very simple stuff.
