I have. “Amstar Nostalgia 49cc” 4 stroke horizontal engine (Honda ss50 clone) all stock currently.
I’m looking to tinker and improve performance, don’t waste my time with the typical “get a 125cc or higher...”
I like the “built, not bought” Mindset
-I Want a 50cc maxed out around 50-55mph...or more.
-Then I’ll want a 90cc or 125cc maxed out at god knows what lol