Yes Tony I wouldn't rave about how it is to ride either, but it is fun to look at and remember the rides it was used on, and it's not a Honda.
Here are more photos of my bike. One is when the SP370 was still an SP370 but made a bit more dirt friendly, taken in 1979. On the PE175C is George Mckenzie. I think we went riding at Mt Glorious/Dayboro that day. My Datsun 1600 is behind us.
The "after" photo is after I did a repaint in 1981, including black sidecovers. Muffler was a supertrapp.
The good things about this bike are the amazing longevity and smooth performance of the motor, the fuel economy, and the ease with which it goes up very steep hills.
The bad things are that it has a relatively long wheelbase and raked out steering, so needs to be ridden with care on single-track, and you need to pay attention to what you are doing in corners on an MX track. The RM seat is a pain on long rides.