Originally Posted by K.i.p
OK, this is interesting and important. I actually ordered a 50cc from Zoom. I assumed I had gotten a lucky break when I read the sticker. As far as I knew this was an 80.
So to clear up this piston issue is there a measurement I can take to confirm my engine size. The piston diameter should be the give-a-way right?
I was upset because the people I bought them for were very specific about wanting 50cc due to legal issues. It was a relief to see they were not 80cc.
It's easy to judge this by outside cylinder size. I can now tell the difference at a glance.