Keihin Idle Pilot Jet for PB / CVK Carburetors - GY6 & 50cc
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Eliminate rough idling and low-end bogging with a precision-calibrated Keihin Idle Jet.
The Keihin Idle Jet (Pilot Jet) controls your scooter's fuel mixture from 0% to about 25% throttle. If your bike struggles to stay running at stoplights or hesitates when you twist the throttle, your idle jet is likely clogged or incorrectly sized. These high-quality brass jets are designed for Keihin PB and CVK style carburetors found on most Genuine 50cc and GY6 50cc scooters.
Detailed Model Fitment:
- Genuine Scooter Co (50cc 2-Stroke): Buddy 50, RoughHouse 50, Rattler 50, Black Cat 50
- Chinese GY6 50cc (139QMB): Fits PD18J and CVK style carburetors used on TaoTao, Wolf, Ice Bear, and Bintelli.
- Carburetor Compatibility: Keihin PB Series and most 18mm-20mm CVK clones.
Key Features:
- Precision Flow: Calibrated internal bore for consistent fuel delivery at low RPMs.
- High-Grade Brass: Corrosion-resistant material ensures long-term tuning stability.
- Available Sizes: Select from #38, #40, or #42 to match your specific engine needs.
Tuning Tip:
If you have upgraded to a performance exhaust or a "Big Bore Kit," you often need to move up one size (e.g., from a #38 to a #40) to prevent a lean condition. Jetting is a process of trial and error.
Technical Specifications:
- Type: Keihin PB / CVK Idle (Pilot) Jet
- Material: Machined Brass
- SKU: JETKH2
Shipping information
Orders are prepared as quickly as possible. Delivery times and shipping costs are calculated at checkout based on the destination and items ordered.
Returns & warranty
Please verify fitment and part number before ordering. Contact Thrifty Scooters promptly if an item arrives damaged or incorrect.