Interesting, as I am thinking about buying one of these for running around my village, but Two questions: 1) I see no mention of an Oil Filter replacement or cleaning - so HOW does one clean or replace whatever Suzuki have installed to clean - an presumably, to filter - their engine oil... 2) As a (retired) Licensed Aircraft engineer, I am used to checking and/or replacing Magnetic Chip Detector plugs in various oil systems on most aircraft engines. Though tiny, this engine would also benefit from the addition of a strongly attractive and heat-resistant magnet (Neodymium or Ferrite), firmly attached to the sump plug inner face. This would attract and hold any wayward ferrous slivers or fragments floating around in the engine oil. As the sump plug has an external recess in the head, this could be drilled right through, tapped with a standard thread, then a steel bolt of that same size cut down as a "Plug" and drilled axially for a close-tolerance fit with your magnet. This is then pinned, peened or Araldited into the steel bolt/plug, which is itself screwed into the sump plug with Epoxy or LocTite as a sealant and permanent fixative. Sounds like a lot of work, but the recess in this sump plug makes that the safest option - and, once installed, next time you change the oil, you just need to look at the plug, then wipe it clean if there are no large chunks of steel clinging to your magnet.
Interesting, as I am thinking about buying one of these for running around my village, but Two questions: 1) I see no mention of an Oil Filter replacement or cleaning - so HOW does one clean or replace whatever Suzuki have installed to clean - an presumably, to filter - their engine oil... 2) As a (retired) Licensed Aircraft engineer, I am used to checking and/or replacing Magnetic Chip Detector plugs in various oil systems on most aircraft engines. Though tiny, this engine would also benefit from the addition of a strongly attractive and heat-resistant magnet (Neodymium or Ferrite), firmly attached to the sump plug inner face. This would attract and hold any wayward ferrous slivers or fragments floating around in the engine oil. As the sump plug has an external recess in the head, this could be drilled right through, tapped with a standard thread, then a steel bolt of that same size cut down as a "Plug" and drilled axially for a close-tolerance fit with your magnet. This is then pinned, peened or Araldited into the steel bolt/plug, which is itself screwed into the sump plug with Epoxy or LocTite as a sealant and permanent fixative. Sounds like a lot of work, but the recess in this sump plug makes that the safest option - and, once installed, next time you change the oil, you just need to look at the plug, then wipe it clean if there are no large chunks of steel clinging to your magnet.