Does anyone accurately know the top speed of an ATC 350X?

 

I know my uncle had his fixed one time to run around
74-76 but I am not sure what sprockets he had at that time.
As for stock I am not sure but probably mid 60's.

 

I have heard mid-60's also. When the 350X came out, ther ewas a guy in Florida that stole one. The only thing they could use to catch him was another 350X. A sheriff chased this guy through some nasty territory and tried to cut the guy off. He ended up giving him a BIG T-BONE in the side. I don't have any proof of this. Just a bit of interest I thought I would ad to show how superior these machines were then.