most reliable 70cc 2 stroke engine?

Firstly, why would you need big hp on a bike not build to handle speed, like most of us?

You want fast etc, buy a motorcycle.

Short answer to dependable, Golden Eagle/Tanaka engine. In my case zero problems out of box, since 07.
 
Looks? Please!

You like motorcycles, buy one!

Simple is usually best, safer and less expensive!
 
the 4 stroke or 2 stroke packrack mount ones are grate motors out the box meny meny miles till you have engine problems yes thay cost more but you don't need to fix them.
 
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