Vespa T5 Mk1 Classic SIP Performance 199cc Racing Cylinder Kit

• aluminium
• 5 ports
• Ø 65,0mm
• stroke 60mm
• conrod 115,0mm
• outlet 3-parts

Racing Cylinder with 60 mm stroke and three-piece exhaust for Vespa T5 Models from SIP PERFORMANCE. 199 cc for the legendary Vespa Sport Engine.

The Vespa T5 engine is considered to be the most modern engine that Piaggio has designed for the classic Vespa models with manual transmission. Unfortunately, the T5 Engine is relatively rare compared to other Vespa engines. As a result, the selection of tuning parts is also smaller than for PX engines, for example. However, the T5 Engine with its large transfer ports and wide Crankshaft offers the best conditions for performance increases.

1. 199 cc
2. 3-piece exhaust
3. Bolted exhaust flange

The aim when developing the SIP PERFORMANCE 199 cc Cylinder was to offer a plug & play setup that enables a perfectly working, powerful Engine - ideal in its characteristics for everyday use and touring. In addition, the Cylinder should offer many reserves and possibilities for tuners and developers to fully exploit the potential of a T5 Engine.

The Vespa T5 has a standard displacement of 125 cc. The installation space for the Crankshaft and Cylinder offer the potential to accommodate 200 cc "Plug & Play". The SIP PERFORMANCE Cylinder is the first T5 tuning cylinder to utilize this displacement potential. This is achieved by a bore of 65 mm and a stroke of 60 mm. This means that the conversion to the SIP PERFORMANCE 199 Cylinder also requires the use of a Crankshaft with a stroke of 60 mm and a connecting rod length of 115 mm.

Transfer ports

The SIP PERFORMANCE 199 cc Cylinder has a modern and very effective 5-channel transfer port system. It has been designed so that the Cylinder can be installed plug & play on the original transfer ports of the T5 Engines and thus functions perfectly. However, the channels in the Cylinder have been shaped in such a way that they offer potential for expansion at the transition to the Crankcase. The bridge between the transfer ducts in the original T5 Crankcase can also be optionally removed to further optimize the transition.

Three-part exhaust duct

The exhaust duct is designed in three parts: a large central outlet and a side outlet on each side. The secondary outlets run inside the cylinder studs. With the help of numerous test bench tests, we have developed a special shape that ensures sufficient cross-sectional area for the secondary outlets to work effectively.

Exhaust flange

The T5's exhaust flange is designed so that the Exhaust is pushed into the flange piece on the Cylinder and fitted. As the original manifold diameter is designed for 125 cc, we have decided to design the flange piece on the Cylinder so that it can be screwed on. The Cylinder is supplied with a Flange that is compatible with T5 exhaust systems. It is fastened with two Screws, sealed with an O-Ring and also offers the option of attaching Springs. However, it is also possible to replace the Flange with a version with a larger diameter. Threads with a larger radius have been used for this purpose. This allows exhaust systems with a larger Exhaust Manifold to be adapted.

Crankshaft with 60 mm stroke and 115 mm Conrod

The SIP PERFORMANCE 199 cc Cylinder is designed for use with a 60 mm stroke Crankshaft and a 115 mm Conrod. The 60 mm corresponds to the maximum stroke that can be realized without machining the crankcase. The longer Conrod compared to the original T5 connecting rod with a length of 105 mm is an adaptation to the increased stroke. The rule of thumb for the connecting rod length is stroke × 2. Remaining at 105 mm while the stroke increases to 60 mm would have had a negative effect on the smooth running of the Engine. With our 60 mm stroke/115 mm Crankshaft, the T5 Engine retains its highly praised running smoothness.

Piston and head

The 65 mm Piston has two 1 mm thick steel piston rings and a biconical Gudgeon Pin. As is usual with T5 engines, the head has a centered Spark Plug. The squeeze area is 47 % of the piston area. The combustion chamber engages in the Cylinder and thus ensures perfect centering. The option of using the original Centring Bushes still exists, but is not required in the Plug & Play setup. The head and Cylinder are shaped so that the original rubbers can be fitted for Vibration Damper.

Cooling Hood Cylinder

The Cylinder can be run with the original T5 Cooling Hood. However, the 10 mm longer Conrod requires the Cylinder Cowling to be spaced out. The easiest way to adapt this is to use a Flywheel Cover-Cylinder Cowling Cover .

Technical details

1. Coated aluminum cylinder
2. 65 mm bore
3. 60 mm stroke
4. 5 transfer ducts
5. 3 outlet ducts
6. Bolted exhaust with O-Ring gasket
7. Self-centering Cylinder Head
8. 2 × 1 mm Piston Ring steel
9. Timing: 122° / 180° / 29°
10. Recommended crushing edge 1.45-1.6 mm
11. Recommended Spark Plug: NGK B8ES
12. Recommended ignition timing: 18°

Scope of delivery

1. Aluminum cylinder with coating
2. Cylinder Head with centering
3. Piston 65 mm
4. 2 × 1 mm Piston Rings
5. Exhaust flange with fitting and O-Ring seal
6. 2 × Gasket Cylinder Base (0.2 and 0.5 mm)

Conclusion: The ultimate cylinder kit for the Vespa T5. Ideal for exploiting the full potential of this legendary Engine - whether for a high-torque touring setup or maximum performance. The SIP PERFORMANCE 199 is always the right choice.

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Delivery is available Worldwide. See our Delivery Information page for further details.