Re: General maintenance?
Well with 4 strokes there's a recommended number of hours to change the oil and number of hours to clean the air filter. A tachometer/ hour counter can be very helpful for this. I usually steel brush the plug every time I do an oil change. I also like to flush the oil crank case with Sea Foam. When ever I clean the air filter I give the carb a spray with Gum Out. This has kept my Robin Subaru 35 running very smooth over the years.
Land Rider Jerry