Description
Carburetor Repair Kit for Yamaha Banshee 350 YFZ350 (1988-2006) — Dual Carb Idle Screw Set
Keep your Yamaha Banshee 350 screaming with this complete carburetor repair kit for the legendary YFZ350 twin-cylinder two-stroke ATV. Designed for the dual Mikuni VM26SS carburetors used on all Banshee model years from 1988 through 2006. Includes the critical idle adjustment screws that are often stripped or seized on used Banshees, plus all gaskets and seals needed to eliminate air leaks and restore crisp throttle response.
What's Included
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Idle adjustment screws (x2) — Reproduction idle screws with spring, washer, and O-ring
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Float bowl gaskets (x2) — Precision-cut for Mikuni VM26SS bowl flange
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Carb top gaskets (x2) — For the slide cover/top cap sealing surface
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Main jet access plug O-rings (x2) — Eliminates air leaks at the main jet plug
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Needle & seat assemblies (x2) — Viton-tipped for leak-free fuel level control
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Carb-to-intake boot gaskets (x2) — Prevents air leaks at the reed cage interface
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Float bowl drain screw O-rings (x2) — Small but critical for leak-free operation
Compatible Models
| Make |
Model |
Year Range |
Engine |
| Yamaha |
Banshee 350 |
1988-2006 |
347cc Twin 2-Stroke |
| Yamaha |
YFZ350 (all variants) |
1988-2006 |
347cc Twin 2-Stroke |
Common Banshee Carb Problems
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Stripped idle screws — Original brass idle screws seize in the aluminum carb body; our reproduction screws use improved thread profile
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Hanging idle — Air leak at the carb boot or float bowl gasket causes lean condition
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Fuel dripping from overflow — Worn needle/seat or float level issue
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Bogging at mid-RPM — Dirty or clogged internal passages
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One cylinder runs hotter — Carb sync is off or one carb is leaking air
Banshee-specific tip: After rebuilding, always synchronize both carburetors using a carb sync tool. Banshee engines are extremely sensitive to carb imbalance — one lean cylinder can melt a piston in seconds.
Frequently Asked Questions
Q: Will this fit my 2001 Yamaha Banshee?
A: Yes. All Banshee 350 YFZ350 models from 1988-2006 use identical Mikuni VM26SS carbs. This kit fits all model years.
Q: My idle screws are completely seized — will these new screws still work?
A: If the original screws are seized, carefully extract them (left-hand drill bit or easy-out) before installing new screws. The new reproduction screws use an improved thread profile that resists future seizing.
Q: Does this kit include main jets or pilot jets?
A: No. This is a repair/rebuild kit focusing on gaskets, seals, and idle screws. For jetting changes, you'll need a separate jet kit based on your modifications (pipes, air filter, porting, elevation).
Q: Do I need new intake boots with this kit?
A: Carb-to-intake gaskets are included. If your intake boots (rubber manifolds between carb and reed cage) are cracked or hardened, replace those separately. Cracked boots cause major air leaks that gaskets alone won't fix.
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