Let’s perform carburettor maintenance.
Number 1 air cleaner side
Number 1 engine side. All the others are in the same condition with dirt and debris accumulated from backfiring and similar issues.
Starter valve. The type with a center positioning pin tends to last quite a while, but it can only be replaced when all four are disassembled, so we’ll replace it.
Fuel bypass for 1–2 and 3–4. This is a part with no individual O-ring option. It’s already cracked. Good timing to replace it.
Fuel T-type bypass for 2–3. A cylindrical seal with a two-stage O-ring assembly. This one is cracking too.
With a 2006 Bandit in this condition, a GSX-R1100 is already in dangerous territory.
Let’s polish the body that’s become dirty and corroded and refresh it.
Like new? It’s become even more beautiful than new. OEM negative-pressure carburetors have very weak small-parts availability. Many items like a single bolt or a single seal don’t come out. This is definitely work that can hurt if you’re not careful.
Jumping ahead a bit, we run fuel through and check the actual fuel level.
If there’s no particular problem, you don’t need to look, but checking gives you peace of mind.
It’s better to replace rubber parts while they’re still available.
The fuel hose is different shapes top and bottom. I wonder what that’s supposed to mean every time I see it.
We synchronized the carbs and it’s running smoothly now.
We had a deadstock filter on hand, so we’re throwing it in as a service.
