Description
This Keihin PB carburetor is the adjustable-mixture aftermarket replacement for Genuine Buddy 50 two-stroke scooters and other models requiring an 18mm PB-style carburetor. Restore crisp throttle response and reliable starting with an accessible adjustable mixture screw that lets you dial in the air/fuel ratio without removing the carburetor. The electric auto choke ensures easy cold starts, and the two-bolt flange mount drops straight onto the stock Buddy 50 intake manifold.
Supplied with Genuine Buddy 50 OEM-spec jetting: #40 idle jet and #72 main jet. Other compatible models may require different jetting to suit their engine and intake/exhaust configuration.
Suggested tuning accessory: Add the Prima 4mm Main Jet Tuning Kit for Keihin PB & CVK carburetors when tuning for another application or intake/exhaust changes. Sold separately, the kit includes #70, #75, #80, #85, #90, #95, #100, #105, #110 and #115 main jets. The kit does not include idle jets.
Features
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Keihin PB Design: Proven reliability for two-stroke 50cc engines.
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Accessible Mixture Screw: Easy air/fuel tuning without carburetor removal.
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Electric Auto Choke: Reliable cold starts with a plug-and-play connector.
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Two-Bolt Flange Mount: Direct fit to the stock Buddy 50 / Roughhouse 50 intake manifold, with 43mm center-to-center bolt spacing.
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Buddy 50 OEM-Spec Jetting: Supplied with a #40 idle jet and #72 main jet.
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Broader PB-Style Fitment: Fits other models requiring an 18mm PB-style carburetor with matching connections; jetting may need adjustment.
Specifications
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Brand / series: Keihin PB
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Part number: 1300-1118
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MPN reference: P51510000002
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Product designation: 18mm PB-style carburetor
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Venturi: 16mm
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Airbox-side outside diameter: 35mm
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Engine-side mount: Two-bolt flange, 43mm center-to-center
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Idle jet: #40
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Main jet: #72
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Choke: Electric auto choke
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Mixture adjustment: Accessible adjustable screw
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Country of origin: Japan
Model Fitment
| Application |
Jetting / installation |
| Genuine Buddy 50 2T (two-stroke) |
OEM-spec #40 idle / #72 main jetting; direct replacement fit with no modifications required for the compatible stock setup |
| Other models requiring an 18mm PB-style carburetor |
Confirm 43mm flange spacing, 35mm airbox connection, cable and choke compatibility; tune jetting for the application |
Before Installation
The yellow piece visible in the photos is a shipping dust cover that keeps debris out of the carburetor during transport. Remove it before installation; it is not an air filter or an operating carburetor component.
This product is intended for off-road use only. This product is not intended for use on public roads or land.
Product Diagrams
