I raced a Maico 250 in 1975 and 1976, and a Suzuki RM125B in 1977 and 10 races in 1978 - amateur only - before college took over all my free time and mental cycles. By late 1977, I came to the conclusion that I enjoyed working on the bikes a lot more than I did racing.
In 1978 and 1979, I also had the opportunity to work as a mechanic for a local rider who was pursing AMA pro motocross on a limited basis, which was a great deal of fun, even if we were not the most successful. I also had the opportunity to work as a mechanic on a limited basis with several local, gifted amateur riders. Being in college at that time allowed me to have access to both a complete machine shop (no CNC equipment though) and a motorcycle dyno.
We designed and manufactured a few parts of our own, and actually raced them during the period. One of the parts actually got used in AMA pro motocross racing in 1979.
Thirty years later, I've decided to resurrect some of that body of work and share it.
I also hope to get around to putting together a set of pages describing my RM125B as it evolved from a stock bike to a 'Pat Ritchter Replica' at the end of the 1978 racing season (and which I still own at the time of this writing).