Modern Vespa

Hello,

Could the Keihin cvk carburators can have a default with the diaphragm and the foam filter in it by laying the scooter on the side when I changed my exhaust I'm out of solution for the poor running after the exhaust change. Could it be the rollers that are now to heavy for the narrower powerband of the tecnigas ?

Greetings

I'm not familiar with your scooter model, but if you lay the scooter on the side of the air filter to work on the muffler, it's going to get saturated in oil, and reduce air flow to the carburetor, thereby reducing performance. This is not a mechanical fault, it's mean ol' Mr. Gravity.

Hi thanks for the reply.

Yes on the air filter side but I already clean the air filter and the intake. After my exhaust installing I loose all my torque. I think it's a powerband and muffler problem I think.

Greetings