BOYESEN - APC-3QS - Quickstart Accelerator Pump Cover - Keihin FCR Carburetor
The BOYESEN APC-3QS Quickstart Accelerator Pump Cover fits the Keihin FCR carburetor on 1998-2025 Honda, Kawasaki, Suzuki, and Yamaha models (including the CRF450X, CRF450R, and CRF250X), featuring a high-volume vertical check valve with a tunable leak jet and integrated Hot Start Assist that eliminates bogging and improves throttle response with simple bolt-on installation.
Features
- High-volume vertical check valve located in the QS3 for precise, consistent fuel metering
- Tunable leak jet maximizes volume of fuel and duration of fuel spray for all conditions
- Integrated Hot Start Assist eliminates problem 4-stroke hot start procedure
- The most effective way to add performance to a Keihin FCR carburetor
- Patented design stops bogging and improves throttle response
- Investment cast and finished to precise tolerances
- Improved low-end performance
- Simple bolt-on installation
- 25% more fuel capacity
- For all Keihin FCR-Equipped MX, Off Road and ATV models.
Specs
- Base Color: Gold
- Riding Style: Off-Road
- Color/Finish: Silver
- Material: Aluminum
- Model: For All Keihin FCR Carbs
- Features: Adjustable
- Base Color: Silver
- Type: Accelerator Pump
- Units: Each
- Model: Quickstart
- Product Name: Cover
- Riding Style: ATV
Frequently Asked Questions - BOYESEN - APC-3QS - Quickstart Accelerator Pump Cover - Keihin FCR Carburetor - '98-'25 Honda, Kawasaki, Suzuki, and Yamaha
How do I know if this part fits my vehicle?
Check the fitment information listed on this page against your exact year, make, model, and (where applicable) trim, engine size, or configuration. If your exact vehicle isn't listed, or you're not sure, use the product chat on this page or contact our support team before ordering - we're glad to help confirm fitment.
What does it mean if a product is listed as universal fit?
Universal fit means the product is designed to work across a range of vehicles, not that it's guaranteed to fit every one. Compare the listed measurements, mounting requirements, and connector or hardware specs against your specific vehicle before ordering, since some installations may need additional hardware or minor fabrication.
Where can I find installation instructions for this product?
General installation notes are provided above where available. For detailed step-by-step instructions, refer to the manufacturer's documentation included with the product, or use the product chat on this page for questions about difficulty, required tools, or whether professional installation is recommended.
What if I have more questions about this product?
Use the product chat on this page for fitment, specs, installation, and compatibility questions, or contact our support team directly for help before you order.
