How to work on a Samurai carbs

In order to adjust your carbs without splashing oil everywhere, you want this bit:

Just use a cracked cover and chop it. It’s also a good idea to keep the oil level slightly lower than mentioned in the manual, you need about 20cc less. That way the oil will just be level with clutch casing’s opening.

You can also see a bit of oil below the carb: this is injector oil. This means your banjo is leaking! That’s an imperative fix.

2 years is just enough time to have the carbs gum up, the gunk in the bowl felt like grease.
After a touch of ultrasound cleaning, the bike runs now perfectly. The fuel stabilizer does really work, normally after 2 years the unleaded fuels just goes bad. I use Motorex fuel stab, which is meant for snowmobiles.