Racing Cylinder EGIG Performance Zero-G 407 cc

for BFA 306 Motor for Vespa 125 VNA-TS/
50 VBA-Super/
60 GS/
80 SS/
ally/
X/
E/
usso/

5
aluminium
5 ports

90mm
stroke 64mm
2 piston ring(s)
with cylinder head
8-times bolted
outlet 3-parts
modifications necessary

TUNING RACE – for professionals

For race use only. Not admitted in the area of the German StVZO! Product description
400cc racing cylinder from EGIG Performance for use on the 306-BFA engine case . You can always go to extremes, at least when you ask EGIG Performance. The 306cc of the-BFA engine seemed to be the end of the line in terms of capacity. For a single-cylinder engine in a vintage scooter this is more than extreme. The Zero-G from EGIG-Performance, however, goes even further with its 407cc.
407cc
3-part exhaust
Forged pistons
Not only the capacity is extreme, but also the layout of the transfer ports and the exhaust are not only modern, but also designed for a powerful power delivery.
Installation
Of course, even on the 306-BFA engine, 407cc cannot be realised entirely without adjustments. The engine case must be machined to fit the larger cylinder base. The exhaust of the cylinder is slightly inclined downwards for better power delivery. Therefore, installations for the-BFA 306 do not fit without adjustments. The screw connection of the stud bolts is designed for the original dimensions of the-BFA block, but the screw connection requires skill and a shortened spanner. However, the work is rewarded with almost unlimited power reserves.Technical data:
Fits BFA306 engine block and its crankshaft with connecting rod or the Killercase for Lambretta from MMW.
90mm bore
64 mm stroke
30
outlet (decreases with more stroke)
Timing 122
to 130
, these can be adjusted using the supplied spacers
Cylinder head, 10-fold bolted, squish band of 1.3
Exhaust width at main exhaust 70%
Exhaust width over all three parts 100%
Manifold
52mm
Transfer port width at cylinder base 132mm
Cylinder skirt
105mm , 25mm long
90mm W
sner piston special to cylinder for 18mm gudgeon pin
Running clearance 13/100
Decompression bore 4mm
The best setup – our TIP:
Engine case-BFA 306
Crankshaft 64mm for engine case