'74 Yamaha DT100. We built a "course" through my uncle's apple orchard. Followed by an endless string of dirt bikes before buying a used Honda CB360T, then a CB750. Took a whole lotta years off then climbed back on a 2009 Super Glide Custom. Feeling good!
Sears minibike with a Tecumseh motor. I was so small I wasn't able to pull the starter rope, it would jerk back out of my hand. Then a Suzuki TS125 when I was 14. At least it was kick start.
I had a 70s something Honda 125 Trials bike. My favorite and most ridden and repaired was a 79 XR500. Back in the early to mid 80s I thought it was the baddest thing on two wheels. About a year ago I rebuilt the carb and let my son run it and some a$$ hole stole it out of the shed. If anyone knows where a hole one is in one piece that I could get running, send me a PM. I had that bike for 25 years and would love to find another.