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Well we have now 100 octane fuel avaialble at the gas stations. I tried it but it did not help. the compression ratio is now at 10.5:1. I suspect that the air cooling is not sufficent because this knocking only appears after approx. 3 minutes of high speed running on the "autobahn" :wink: The...

She´s doing fine. I still have some probs with the engine at higher revs in the 4th gear. There´s a phenomenon for which I do not know the english expression: When the gas temperature in the barrel becomes to high the gas mixture spontaneously combusts causing damage to the piston. A possible...

GREAT! :mrgreen: It is a P 200, at the with a standard engine. But I already started to think about how it would be if this Teutonic Tetanus should become a terrorist. I have two other vespas with mean engines. One is not finished but the other one develops 38HP at the crankshaft which is...

Hi lads I ´m new here. My name is Mark and I ´m from Germany. Everything started as found a shop in Hamburg selling Felt Cruisers. Must have was my first thought. I spent a lot of time and money in restoring, tuning and customizing old Vespa Scooters. Now that my latest scooter project is nearly...