These Tuning Kits include the most important parts of the SIP-BFA engine—almost like plug-and-play.
The oldest adage in internal combustion engine design: There’s no substitute for displacement—except for even more displacement. BFA has taken this principle to the extreme and offers an engine for Vespa Largeframe models with a displacement of 306 ccm. In doing so, they left no stone unturned. The crankcase, cylinder, and crankshaft were redesigned and adapted to the demands of a 306-ccm high-end powerplant.
The result takes Vespa tuning to a whole new level. Power, torque, and the power band are more comparable to a motocross bike than to a classic scooter.
- All key SIP-BFA engine components in one kit
- Includes crankcase, cylinder, crankshaft, and intake system
- Includes bearings, Oil Seals, and key special parts
- Ideal basis for extreme large-frame engines
It would go beyond the frame of this article to go into detail here about all the individual components of the Tuning Kit. These are described in detail in the respective product listings. These kits contain all the key SIP-BFA engine components. In addition, we’ve included all parts that cannot be sourced from a standard PX/T5 engine, such as bearings, Oil Seals, or special BFA components. Parts that are essential for a new PX Crankcase, such as Rubber Engine Mounting Bushes, are also included.
Gearbox parts, the Cylinder Cowling, and the Flywheel Cover can be reused from any existing engines. Small parts, nuts, and Woodruff Keys must be ordered separately from the PX Lusso engine.
Scope of delivery for Tuning Kits with engine small parts
- SIP-BFA 225 or 306 crankcase
- SIP-BFA 225 or 306 Racing Cylinder, including Cylinder Head
- Full Circle Crankshaft SIP-BFA 225 or 306
- SIP-BFA Intake Manifold with 4-valve Reed Valve
- Bearing Set Engine/Motor
- EngineOil Seal Set
- Rubber Engine Mounting Bushs with Spacer
- Modified Kickstart Gear
- Vacuum Connection and Blind Plug
- Cover Sheet for Flywheel Cover/Cylinder Cowling
Due to the wide variety of carburettors and ignitions available, these are not included in the scope of delivery. For our SIP-BFA engine projects, we have always installed the adjustable SIP PERFORMANCE ignition system by VAPE and the large DELL’ORTO VHSB 39 ND carburettor.
For the transmission, we also rely on PX Lusso gears from DRT for the 72-PS project and vary the DRT Input Shaft Assemblies here.
Conclusion: No tedious searching—with just one item, you can order all the main components of the SIP-BFA engine.
These products fit perfectly—SIP TIPS:
- Be sure to order the matching Kickstart Shaft and modified Kickstart Lever
- Use theDRT “PX Lusso”driveshaft and Gear Cogs
- Select the appropriate DRT Input Shaft Assembly and Primary Driven Gear
- Plan to include the T5 Flywheel Cover and Cylinder Cowling as suitable additions
- An ideal carburettor for a high-performance setup is the DELL’ORTO VHSB 39 ND
- Order a compatible long-thread Spark Plug, e.g., DENSO IW 31 or NGK BR10EIX
- Use fully synthetic oil, e.g., SIP Race or MALOSSI 7.1 Racing
- Use the SIP PERFORMANCE ignition system by VAPE for the PX
Feedback from the scene
“Important: I have to add a trash bag, a pair of spare underwear, and a pack of wet wipes to my Tool Kit.”
–Marek Nachlik, legendary customizer, on his driving impressions of the BFA 306
Limited Edition
The BFA 306 Crankcases and complete Tuning Kits are produced in limited small series. The components come exclusively from Italian workshops specializing in tuning. Many work steps are necessary for these high-tech products. The effort involved is high. For this reason, we only decide on a new edition once a series in stock has been sold off.
However, we always have sufficient cylinders, Crankshafts, Clutches and wear parts in stock.
