Polini Big Evolution Conical Air Box - D.48
Best current price£33.10from eBay
Best offers
Shopping.co.uk recommended and popular offers
eBay£33.10Visit shop Oil Filter Power POLINI Big Evolution Conical Ø48 Pwk (2030150) for Moto
Visit shopeBay£33.10Visit shop All Offers
2 offers from £33.10 - £41.72
View price history by clicking the chart icon.
eBayOil Filter Power POLINI Big Evolution Conical Ø48 Pwk (2030150) for Moto
£16.93 delivery
£33.10
Visit shop
Oil Filter Power POLINI Big Evolution Conical Ø48 Pwk (2030150)£8.46 delivery£41.72Visit shop →
Product Information
Full details
The Polini Big Evolution Conical Air Box D.48 is designed for scooter enthusiasts and performance tuners who need to optimize engine intake efficiency. This component significantly improves airflow to the carburetor, resulting in more responsive combustion and increased engine power; however, users should note that the conical design may require specific carburetor clearance adjustments for proper installation.
All features
| Model Part Number | 203.0150 |
|---|---|
| Brand | Polini |
Extended Product Information
FAQs
Does this air box require re-jetting?
Yes, because the air box increases the volume of air entering the engine, you will likely need to adjust your carburetor jetting to maintain the correct air-fuel ratio.
Can I use this on a stock engine?
While it can be mounted, this air box is specifically engineered for high-performance setups and may not provide noticeable benefits on an entirely stock engine.
How often should I clean the filter?
Cleaning intervals depend on riding conditions. In dusty environments, inspect and clean every 500 miles; in cleaner street conditions, every 1,000 miles is sufficient.
Is the connection diameter adjustable?
No, this specific model is designed for a 48mm connection. Attempting to force it onto different sizes will cause air leaks.
Should I oil the filter element?
Yes, using a high-quality air filter oil is recommended to ensure fine dust particles are trapped before they reach the engine.
Troubleshooting
Engine feels boggy at high RPM
The increased airflow may have created a lean condition; re-jet the carburetor with a larger main jet.
Air box vibrating or loosening during ride
Check that the hose clamp is tightened securely and ensure the unit is not resting against the frame or chassis.
Excessive intake noise
Conical performance air boxes are louder by design due to the increased suction; this is normal operation for this product type.
Pros and Cons
Pros
- Significantly increases air suction capacity
- Improves throttle response and combustion
- Robust construction suitable for performance engines
- Tailored for high-end tuning setups
Cons
- Requires specific 48mm intake connection
- Larger profile than stock air boxes may limit space
- May necessitate carburetor re-jetting for optimal performance
Setup, Compatibility & Care
To install the Polini Big Evolution Conical Air Box, first ensure that your carburetor intake diameter is exactly 48mm. Slide the rubber mounting collar over the carburetor intake and secure it using a high-quality hose clamp to prevent air leaks, which can lean out your fuel mixture. Regarding care, because this is an open-style performance filter, it is susceptible to debris and moisture. Inspect the filter element after every 500-1000 miles of operation. Clean the element using approved foam or gauze filter cleaner, ensure it is completely dry, and re-oil it sparingly with proper air filter oil before re-installation to maintain its filtering effectiveness.