EGIG 170 cc cylinder kit for Vespa Smallframe with 115 mm connecting rod
The EGIG 170 cc cylinder kit turns a standard Smallframe engine into a high-torque touring and everyday engine without having to mill the engine housing. Cast iron cylinders, 51 mm stroke and a 115 mm connecting rod ensure smooth running, high load capacity and a very wide usable speed range.
170 cc Smallframe
Cast iron
6 transfer ports
One-piece exhaust
Almost P&P
Technical data EGIG 170
Displacement: 170 ccm
Stroke: 51 mm
Connecting rod length: 115 mm
Bore: Ø 65 mm
Transfer port: 6 channels
Exhaust: one-piece, approx. 66 % of the bore
Timing: approx. 124° / 184°
Material: gray cast iron
Piston: 2 piston rings
Intake: direct intake at the cylinder or via housing (diaphragm or rotary valve)
Stud distance intake port: 65 mm
Stud distance exhaust: 56 mm
Power: over 25 hp and 24 Nm possible without milling work
Oil recommendation: Mixed oil 1:33 (e.g. Motul 800)
Scope of delivery EGIG 170 cylinder kit
EGIG 170 cylinder
EGIG 170 cylinder head
Piston d65 with accessories
Intake manifold gasket
M7 cap nuts and spring washers
Screws for cylinder head and exhaust flange
Exhaust gasket
Cylinder base gaskets
Recommended accessories
EGIG 170 stud bolt
Shock absorber offset
Shock absorber extension
Cylinder cover spacer
Direct intake cover plate (for case intake)
Necessary modifications to the engine housing
Remove approx. 2 mm of the housing edge protruding above the sealing surface on the cylinder base (file/Dremel is sufficient).
No milling work necessary on the housing or cylinder for the transfer ports.
With SIP Evo engine housings, the set is designed as 100 % Plug & Play.
99 % P&P means: Installation without special tools, only a small adjustment to the ignition fin is required.
Characteristics and area of application
Thanks to the one-piece exhaust and the 6-channel layout in conjunction with the large displacement for a smallframe engine, the EGIG 170 is a very high-torque cylinder kit. Even with an original gearbox (without short fourth gear) and 2.46 primary, the engine accelerates from around 35 to over 135 km/h without a pronounced power gap. This was tested in conjunction with the EGIG Superbanana Sport, among other things.
Intake: direct or via the housing
The cylinder can be operated with direct intake via a diaphragm box bolted to the cylinder. Alternatively, intake is possible via the engine housing, either diaphragm-controlled or via the standard rotary valve. This means that the design remains flexible - from the classic carburetor setup via the engine housing to modern diaphragm solutions on the cylinder.
Why gray cast iron?
Grey cast iron was deliberately chosen because this material reacts much less sensitively to tuning errors or slight jamming than a comparable aluminum cylinder. Slight jamming can often be repaired without rendering the cylinder directly unusable. However, no guarantee can be given that the cylinder will run perfectly again after a jam.
Compatible vehicles
Vespa 50 (V5A, V5B, various versions)
Vespa 90
Vespa Primavera 125 / VMA2
Vespa ET3 125
Vespa PK S / PK XL / PK XL2
All comparable smallframe engine housings with a suitable mount
FAQ EGIG 170
No. Only the small edge of the housing at the cylinder base is reduced to approx. 2 mm. The transfer ports themselves do not require any milling work on the housing.
Yes. In addition to direct intake at the cylinder, intake via the engine housing is also possible, either with a diaphragm or classic rotary valve.
With the right components, outputs of over 25 hp and around 24 Nm are possible without having to mill the housing. The exact power depends on the carburetor, exhaust and tuning.
Yes. By dispensing with complex milling work and the tolerant gray cast iron material, the kit is also suitable for ambitious beginners who want to build a durable and powerful smallframe engine.
Legal notice:
All items and engines from EGIG Performance are intended for exhibition purposes only. Use on public roads and race tracks is prohibited. No liability is accepted for personal injury or damage to property.
DE | €
