Universal Parts
Universal Parts 18.5mm PB Carburetor - 2-Stroke Scooters
Description
This Universal Parts 18.5 mm PB-style carburetor helps you dial in fueling on a compatible Honda Dio-style two-stroke scooter or big-bore build. An automatic electric choke handles cold-start enrichment, while a four-position adjustable needle gives you room to tune the response to your engine setup. The metal body, float bowl, and straight throttle-slide top form a compact assembly with an attached choke harness.
Key Features
- PB-style replacement: Keihin PB-style configuration for compatible Honda Dio / Elite S, SA, and SR applications.
- Electric enrichment: Automatic choke with a two-pin male plug; your compatible original choke may be reused if the connector differs.
- Adjustable fueling: Four needle positions with a #92 main jet and #38 idle jet provide a starting point for tuning.
- Vacuum connection: Vacuum port can supply a petcock or other vacuum-operated equipment; securely cap it when unused.
- Adaptable cable routing: Straight throttle-slide top may be exchanged for a compatible original top when required.
- Big-bore applications: Can be used on Genuine Buddy 50 and RoughHouse 50 engines with big-bore kits installed; re-jetting may be necessary.
Technical Specifications
- Brand: Universal Parts
- Part number: 114-55
- Manufacturer part number: 2902
- Carburetor style: Keihin PB-style aftermarket
- Intake inner diameter: 18.5 mm
- Mounting bolt-hole spacing: 42 mm
- Air-filter mounting outer diameter: 35 mm
- Choke: Automatic electric, two-pin male plug
- Needle adjustment: Four positions
- Throttle-slide diameter: 15 mm
- Main jet: #92
- Idle jet: #38
- Jet thread specification: M4 × 0.80
- Throttle-slide top: Straight
- Vacuum port: Included
Compatibility
| Make / application | Models | Requirements |
|---|---|---|
| Honda | Dio / Elite S, SA, SR-style 50cc two-stroke scooters | Match mounting dimensions, choke connection, and cable routing |
| Kymco / SYM | Select two-stroke models | Matching PB-style configuration and mounting dimensions required |
| Genuine | Buddy 50, RoughHouse 50 | Big-bore kit installed; tuning and possible re-jetting required |
Compare the 42 mm mounting spacing, intake and air-filter diameters, throttle connection, choke plug, vacuum connections, and clearance before ordering. This is not a blanket fit for every model from these manufacturers.
Securely cap the vacuum port if it is not connected to a petcock or other vacuum-operated equipment. If reusing the original choke or slide top, confirm that it is compatible and that the throttle closes freely. Tune jetting for the engine, intake, and exhaust configuration before riding.
This product is intended for off-road use only. This product is not intended for use on public roads or land.
Product Diagrams
Features
Specifications
Brand: Universal Parts; Part number: 114-55; MPN: 2902; Style: Keihin PB-style aftermarket; Intake ID: 18.5 mm; Bolt-hole spacing: 42 mm; Filter mount OD: 35 mm; Choke: Automatic electric, two-pin male; Needle: Four positions; Slide diameter: 15 mm; Main jet: #92; Idle jet: #38; Jet thread: M4 × 0.80; Slide top: Straight; Vacuum port: Included, cap if unused; Use: Off-road only
Model Fitments
Honda Dio / Elite S, SA, SR-style 50cc two-stroke scooters with matching PB-style configuration; Select Kymco / SYM two-strokes with matching dimensions; Genuine Buddy 50 and RoughHouse 50 only with big-bore kits installed; Re-jetting and compatible original choke / slide-top substitution may be required
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Same day shipping for orders placed before 2PM (CST) M-F
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30-day return period on eligible items
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Flat-rate shipping for orders shipped to the 48 Contiguous United States.
