Im actually in the same boat as you are. The neighbor lady next door to my friend has a son who is 12. He wanted something to ride, so she bought him a 85 125m, then asked me to fix it up. The thing is rigged badly. When I first fired it up it smoked like a freight train. Today I rebuilt the engine, I had just got the cylinder bored .020 over, installed new gaskets and no more smoke. It had some random Chinese pitbike carburetor on it, and it has no screws on the bottom to take the bowl off! I was able to find the correct carb from a guy at work, and all he wanted was one mountain dew! So far Im doing all the labor for free, although she paid for the piston and gaskets. A few bad things on this one are: fugly welding to make a "seat latch" on the rear of frame, welded SOLID right axle nut to axle, bolts instead of studs on left wheel, badly dented gas tank, no front fender - just a 2 inch piece of it snapped off, rear fenders busted all to heck, seat duct taped with black tape, chain sloppy, tires on rear are bald, carb I got for a pop has a hole in the plastic float. The plus' are the headlight looks great, and the front tire is new - that's it. I was wondering as I was rebuilding the engine if it was worth it, but then I remembered when I was the same age, but on a YT 125. It is deffinatly worth it to tp me to make this thing rideable for this boy.
THE 80's RAGE! Currently owns:
81, 85 Yamaha Tri Moto 125
83 Yamaha Tri Moto 200 x2
82,83 Yamaha Tri Moto 175 project
85 Yamaha Tri Z 250
84 Kawasaki Tecate 250
84 Honda ATC 70
85 Honda ATC 350X
84 Honda ATC 250R
(2) 84 Honda ATC 200x
82, 83 Honda ATC 185s
81 ATC 200
Lots of other parts and bikes