Tuning Kit for legal conversion to 125cc for Vespa Smallframe Models.
The 125cc displacement class is traditionally a very popular class, as it serves as an entry-level class for individual mobility for 16-year-olds, among others. In some countries, 125cc two-wheelers can also be ridden with a car driver's license. Since 2020, there has also been a regulation in Germany that allows holders of a car driver's license to add 125cc two-wheelers to their license with a few driving lessons. A good reason for many to convert their Vespa to this displacement class.
- First certificate that converts 50cc vehicles to 125cc!
- Powerful Cylinder from VMC Großer
- Scope of delivery incl. Crankshaft, Exhaust, Carburettor and Ignition
Creating a certificate for the conversion from 50cc to 125cc is unfortunately not easy. After 1.5 years of testing and research, we have managed it in cooperation with our partner at GTÜ. With this kit it is possible to officially register a 50cc Vespa Smallframe as a 125cc. Of course, it is also possible to equip 80-125cc smallframes with this kit to make them road legal.
Engine update with TÜV approval. The easiest way to make your scooter legally faster.
With the parts certificate kits, we now offer you the pearls of our many years of tuning experience in the form of all-round carefree packages for registration in the vehicle documents. The kits not only save time and nerves, they also greatly reduce the costs associated with registration. They provide a secure basis for registration without any problems with the inspection authority. The scooter is then legal, safe and fast on public roads.
The Cylinder
At the heart of the Tuning Kit is a powerful Cylinder from VMC. It offers 125cc displacement combined with a very modern cylinder layout. The 6 channels have a modern layout and large cross-sections. The head is 8-fitting, and a high-quality flat piston with 2 Piston Rings is used as the piston.
The technical details at a glance
- Cast iron cylinder
- Bore 55.6mm
- Displacement 123.83cc
- Stroke 51mm
- 6 transfer ports
- Flat piston with two Piston Rings
- 8-bolt Cylinder Head
- Incl. 5 base gaskets
- Recommended Spark Plug B9ES
- Ignition timing 18° from TDC
What is included in the kit?
The kit is comprehensive and includes all parts that are important for the performance of the Engine. From the Carburettor to the Crankshaft to the Exhaust. The Vape Ignition is also included in the kit. It delivers the required power particularly reliably and powerfully. It also fits the VMC GS Cylinder without any modifications. This is slightly wider. Therefore, not only must the Dust Cover Ring on the Crankcase be removed, but a modified Flywheel must also be used. The Vape eliminates this problem.
Scope of delivery
- Cylinder SIP Road Banane / Polini Banane
- Crankshaft
- Primary ratio 2.56
- Piaggio Air Filter
- Intake Manifold
- Carburettor SHBC 19.19
- Vape Ignition
- optional if not included in the kit, SIP Crankcase:
- - Vespa 50-125/PV/ET3 24303000
- - Vespa PK50-125/S 24303000
- - Vespa PK 125 ETS 24320000, 24302000, 24302B00
- - Vespa PK50-125/XL 24310000, 24301000, 24301B00
what else is needed:
The Studs for the Cylinder and the Cylinder Cowling must be replaced for the conversion.
Depending on the connection width of the Fuel Hose, a reducer is required. Our recommendation:
Small parts such as Gaskets, Studs, Bearing etc. are also required to fit the Tuning Kit. A list can be found further down on the page under "Notepad - SIP TEAM"
Conclusion: with this kit, a 50cc motorcycle can not only be legally converted to 125cc, the scooter can also boast modern performance after the modification.
Caution: Before fitting the Cylinder, the ring-shaped part of the baffle on the engine block that protrudes over the cylinder sealing surface must be removed. It would collide with the Cylinder's large transfer ports. An original Flywheel would also not fit in this position.
The best setup - our SIP TIP:
Shock Absorbers SIP PERFORMANCE 2.0
Brake Shoes SIP PERFORMANCE
Cable Kit SIP PERFORMANCE
