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Racing Cylinder SIP BFA 306 cc for BFA 306 Motor for Vespa 125 VNA-TS/150 VBA-Super/160 GS/180 SS/Rally/PX/PE/Lusso//T5
Part no.: 78245600
€1,215.00
Including VAT Free shipping
4,04kg / Piece
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Product image for 'Racing Cylinder SIP BFA 306 ccTitle' Images may differ from the original
Product image for 'Racing Cylinder SIP BFA 306 ccTitle' Images may differ from the original
Product image for 'Racing Cylinder SIP BFA 306 ccTitle' Images may differ from the original
Product image for 'Racing Cylinder SIP BFA 306 ccTitle' Images may differ from the original
Product image for 'Racing Cylinder SIP BFA 306 ccTitle' Images may differ from the original
Product image for 'Racing Cylinder SIP BFA 306 ccTitle' Images may differ from the original
Product image for 'Racing Cylinder SIP BFA 306 ccTitle' Images may differ from the original
Product image for 'Racing Cylinder SIP BFA 306 ccTitle' Images may differ from the original
Product image for 'Racing Cylinder SIP BFA 306 ccTitle' Images may differ from the original
Product image for 'Racing Cylinder SIP BFA 306 ccTitle' Images may differ from the original
Product image for 'Racing Cylinder SIP BFA 306 ccTitle' Images may differ from the original
Product image for 'Racing Cylinder SIP BFA 306 ccTitle' Images may differ from the original
Product image for 'Racing Cylinder SIP BFA 306 ccTitle' Images may differ from the original
Product image for 'Racing Cylinder SIP BFA 306 ccTitle' Images may differ from the original
Product image for 'Racing Cylinder SIP BFA 306 ccTitle' Images may differ from the original
Product image for 'Racing Cylinder SIP BFA 306 ccTitle'
Product image for 'Racing Cylinder SIP BFA 306 ccTitle'
Product image for 'Racing Cylinder SIP BFA 306 ccTitle'
Product image for 'Racing Cylinder SIP BFA 306 ccTitle'
Product image for 'Racing Cylinder SIP BFA 306 ccTitle'
Product image for 'Racing Cylinder SIP BFA 306 ccTitle'
Product image for 'Racing Cylinder SIP BFA 306 ccTitle'
Product image for 'Racing Cylinder SIP BFA 306 ccTitle'
Product image for 'Racing Cylinder SIP BFA 306 ccTitle'
Product image for 'Racing Cylinder SIP BFA 306 ccTitle'
Product image for 'Racing Cylinder SIP BFA 306 ccTitle'
Product image for 'Racing Cylinder SIP BFA 306 ccTitle'
Product image for 'Racing Cylinder SIP BFA 306 ccTitle'
Product image for 'Racing Cylinder SIP BFA 306 ccTitle'
Product image for 'Racing Cylinder SIP BFA 306 ccTitle'
Product image for 'Racing Cylinder SIP BFA 306 ccTitle'
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Racing Cylinder SIP BFA 306 cc

for BFA 306 Motor for Vespa 125 VNA-TS/​150 VBA-Super/​160 GS/​180 SS/​Rally/​PX/​PE/​Lusso/​/​T5

  • aluminium
  • 5 ports
  • Ø 78mm
  • stroke 64mm
  • 1 piston ring(s)
  • with cylinder head
  • 8-times bolted
  • outlet 3-parts
 
TUNING RACE - for professionals
 
For race use only. Not admitted in the area of the German StVZO!
€1,215.00
Review now
Including VAT Free shipping
4,04kg / Piece

Product description

The most powerful cylinder kit with the largest engine capacity for traditional Vespa Largeframe models: The 306ccm by BFA Motori

 

A lack of engine capacity can be compensated by numerous technical tricks and improvements. If the engine makes use of these tricks and improvements already finding more power becomes a real challenge. The original Vespa engine was never meant for maximum power, and, let’s face it, it’s a bit dated too. Hence it does not exactly lend itself for high end tuning. The lack of “real estate” for decently sized ports could be compensated for with a larger engine capacity, and limitations in bore and stroke size wouldn’t be a problem if it were possible to improve the layout of the barrel by using a modern port arrangement. The best solution obviously would be a modern, large capacity engine. A pipedream? Actually, no!

With designing the SIP BFA 306cc Racing Kit BFA has made a dream come true; a dream in which there hardly seem to be any limits to build a large capacity two-stroke engine. A dream with 306cc and a thoroughly modern cylinder layout whose full potential has yet to be exploited.

  • 306ccm engine capacity
  • Modern port layout with huge transfer port area and a triple exhaust port
  • Cylinder head bolted down with 8 bolts, centre spark plug design
  • Short cylinder studs which do not interfere with the port layout

Layout of the SIP BFA 306 cylinder kit

The engine capacity, which, for a geared Vespa, is unprecedented, is the result of 64mm of stroke and a bore of 78mm. The piston features a flat crown and one piston ring. The cylinder-head bolts down with 8 short bolts, with a central spark plug, and it seals with an O-ring. The cylinder itself has 5 transfer ports and one main exhaust port with two sub exhaust ports. The exhaust flange bolts to the cylinder with 4 bolts. The outside diameter of the exhaust stub is 50mm. The barrel is held down on the crankcase with four short bolts, unlike the long studs of the original type cylinders. As a result BFA could start the barrel design on a clean sheet, without a need to design ports around limiting cylinder studs.

 

With preconditions like these the sky is the limit. Transfer port timing still are in the ballpark of a fast road-touring engine. You could either build a low revving engine with tons of torque and a wide powerband, or you could opt for an engine happy to rev, pushing out in excess of 50 BHP or 60 even. Whatever rocks your boat is on the table for you to choose.

 

Conclusion: The ideal Vespa kit, possibly the ultimate happy ending to all teenage dreams.

 

A list of technical details:

  • Plated aluminium barrel
  • 78mm bore
  • Engine capacity of 306 cc
  • Stroke 64mm
  • 5 transfer and 3 exhaust ports
  • Flat crown piston with one 1mm piston ring
  • 8 bolt cylinder head with centre spark plug
  • Includes 2 base gaskets and one O-ring for the cylinder head

Our recommendation - SIP-TIP:

  • Only fits crankcase art.-no. 78245500 and crankcase art.-no. 78245800
  • Best combined with T5 cylinder cowl art.-no. 23321700 and flywheel cover art.-no. 23328500
  • Order the correct long thread spark plug such as DENSO IW 31 art.-no. 88571000 or NGK BR10EIX art.-no. NGKBR10EIX
  • Run with fully synthetic two stroke oil, SIP Race art.-no. 14440000 or MALOSSI 7.1 Racing art.-no. 76823000

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Notepad

Get inspired. This product is included in the following public notepads:
Notepad name User Change date Article Note
Garage Mechanic BjornS June 22, 2021 16 View notepad
180ss Motor RaphaelH June 21, 2021 9 View notepad
Tai BFA 306 Mahealani Ou TaiariiT June 9, 2021 8 View notepad
Danny DannyB March 14, 2021 7 View notepad
BFA Motor seans November 1, 2020 16 View notepad
High End MarioD October 9, 2020 8 View notepad
Traumteile NikolausP October 7, 2020 6 View notepad

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Downloads

File name File type Description File size
Technik_Zylinder Technik Zylinder Vespa 46,55 MB Download
Tuningübersicht Largeframe Tuningübersicht Largeframe 0,20 MB Download
Technik_Zylinderkopf Technik Zylinderkopf 0,38 MB Download
Cylinder head technology Cylinder head technology 1,60 MB Download
Cylinder technology Cylinder technology 6,14 MB Download
Tuning summary largeframe Tuning summary largeframe 1,70 MB Download
BFA 306 Leistungsgutachte BFA 306 0,24 MB Download
Power Graph BFA 306 - 71PS SIP Custom Something Special Power Graph BFA 306 - 71PS SIP Custom Something Special.pdf 0,54 MB Download
Leistungsdiagramm BFA 306 - Box Prototyp -Keihin 38 - Davide Leistungsdiagramm BFA 306 - Box Prototyp -Keihin 38 - Davide.pdf 0,23 MB Download
Power Graph BFA 306 - 46PS Touring Power Graph BFA 306 - 46PS Touring.pdf 0,42 MB Download
Power Graph BFA 306 - 55PS Plug and Play Power Graph BFA 306 - 55PS Plug and Play.pdf 0,54 MB Download
Leistungsdiagramm BFA 306 - 55PS Plug and Play Leistungsdiagramm BFA 306 - 55PS Plug and Play.pdf 0,54 MB Download
Leistungsdiagramm BFA 306 - 46PS Tourenmotor Leistungsdiagramm BFA 306 - 46PS Tourenmotor.pdf 0,47 MB Download
Leistungsdiagramm BFA 306 - 71PS Leistungsdiagramm BFA 306 - 71PS.pdf 0,54 MB Download
Power Graph BFA 306 - Box Prototyp -Keihin 38 - Davide Power Graph BFA 306 - Box Prototyp -Keihin 38 - Davide.pdf 0,27 MB Download
BFA 306 Box vs. Original Leistungsmessung BFA 306 Box vs. Original 0,22 MB Download
BFA 306 Resi Box Leistungsdiagramm BFA 306 Resi Box 0,18 MB Download
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