I always think it's funny how people don't want to know how to find the info they need, they just want somebody else to supply the answer for them. The problem with relying on somebody elses answer is that you're really only relying on their OPINION. I wouldn't put a junk E3 in anything I own, but that's just my opinion.
I got that bike from my Uncle was I was like 10. Cracked the head off of one of the valves when I was about 16. I put the wrong size spark plug in. I guess the threads were too long, I didn't know how to fix a valve back then so I got rid of the thing, and got a Kawi KE 100. I didn't even think about mini's until I was in PepBoys and seen the Doodlebug a few years ago. Wow, I started remembering all the fun I had. My interest started up big time again. I looked all over the net for minibike places. Couldn't find much. I think there was "minibike central" or something. a few other places. when this forum came out and I stumbled on it, I lurked for MONTHS before I posted anything. I searched EVERY catergory EVERY DAY. I didn't even know I had a Fox Thunderbolt until I saw it here. These kids today dont even try and search. I guarantee, 99% of the bull:001_9898: they ask about, has been covered on here in some form or another.