Which engine 66/80 or 80/100 engines are better?

[Trent Bikes]

I thought bicycle-engines.com engines were higher quality, but not really. Don't remember why I thought so. Guess I wasted $270 on the Zeda 100 (YD100) and could've at least used that much money on the phantom 85, or half of it for those cheaper ones on amazon/ebay. I heard 66/80cc engines (or at least pk80 or something else I can't remember) is better than the 100s (80/100cc) or yd100 (or something else) at least.

Which engine is more efficient (not all is efficient, I am aware), more powerful? Besides the phantom 85.

 

[2stroker412]

I think that Zeda 100 is actually different than a yd100. You have a link to the one you bought?

 

[Larry Trotter]

I have done 4 of them. All with the cheapest eBay or Amazon kit. Every one ran and performed fine. Just buy a cheap kit and build it.

 

[Testname111]

I like bikeberry kits