| Easy to get started | Ideal for beginners in engine tuning - clear orientation during machining |
| Safe application | No unnecessary interventions - sealing surface remains intact |
| Torque & reliability | Touring optimization instead of racing character - ideal for everyday use and long distances |
With the bgm PRO milling template, the intake timing of classic Vespa rotary valve engines can be specifically improved - for more torque, better filling and noticeably greater riding pleasure. Developed for typical touring setups, it enables optimization suitable for everyday use without risk to the sealing surface.
Vespa engines with tuning cylinders and larger displacement are often limited in terms of torque due to their very conservative intake times as standard. With the bgm PRO template, you can get the full potential out of your engine:
✅ More torque: The larger intake angle provides more timing cross-section and fills the cylinder better
✅ S uitable for everyday use: Perfectly matched to touring setups with SI carburetor
✅ No experiments: Clean orientation for the width and depth of the intake
✅ Tested technology: Developed for realistic riding conditions - not for laboratory values
The bgm PRO template is based on experience from numerous Vespa tuning projects. It helps you to transfer sensible steering angles to your engine housing - quickly, safely and precisely. The control angles for powerful touring operation (approx. 110°/55°, depending on the case) deliver strong performance with full suitability for everyday use.
NOTE: The old engine cases cannot be opened as far towards top dead center (TDC) at the intake as the later PX cases. On the old housing types discussed here, a stud bolt is positioned very close to the intake window. An extension of the control angle after top dead center is therefore only possible by modifying the intake control rod of the crankshaft. Today's crankshafts are already optimized in this respect and have a longer opening angle than an original Piaggio crankshaft ex works.
Largeframe 2-channel: VNB, VBB, GL, Super, GT, GTR
| Question | Answer |
|---|---|
| Do I need special tools? | No. The template and a file are sufficient. It is quicker and more precise with a small hand router (e.g. Dremel or Proxxon). |
| Does the modification affect the sealing surface? | No, the template is designed in such a way that the sensitive sealing surface is not damaged. |
| Is the modification legal? | The modification is considered a classic Vespa tuning. Use on public roads is at your own risk. |
| What are the advantages of the modification? | More power, more torque, better acceleration - often even with lower consumption and the same reliability. |
DE | €
