There are various other things, but let’s check on cylinder 4 fouling.
It’s easy to remove, but first let me check where the smell is coming from.
The float valve doesn’t seem to have much step wear. A light leveling should help.
Tank rust is inevitable for a bike of this era. It’s minor, so I’ll hold off for now.
The pin-type starter valve is tight, but it’s making contact, so I’ll hold off on that too.
Let’s try it on just one spot to see how it goes.
After the engine started, I checked and… it’s oil.
Oil blow-by.
The compression gauge that hardly ever gets used. All four cylinders have compression, so I feel a bit relieved.
It’s time to do an engine overhaul.
