Vespa Ciaos intake drilling

Chris Carleton /

Thinking this is a Euro block? Came off a Boxer. Good candidate for drilling?

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Re: Vespa Ciaos intake drilling

Some of the cases Euro or US spec came with these super restricted intakes. You need to drill the intake and then carefully file/dremel the intake patch.

I just opened up a set of cases like this, they take slightly more work to get them right.

Re: Vespa Ciaos intake drilling

Ya, follow the directions in the Wikki. I like to put tape on the drill bit to set the depth, so I don’t go too deep and blow a hole in the divot on the stator side. I was shocked at how easy that is to do.

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Also hose clap on the intake. To help it from breaking. There is good info in the Wikki.

Re: Vespa Ciaos intake drilling

Re: Vespa Ciaos intake drilling

Dirty30 Dillon /

I was trying to find the photo I had of the unrestricted intake patch, but yeah, you have the smol one.

The factory large patch is rectangular, matching the exterior, with a 1.5mm~ long-side edge, and 2.5~mm on the ends.

Re: Vespa Ciaos intake drilling

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Here is what the unrestricted one looks like.

Re: Vespa Ciaos intake drilling

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This is the tiniest I have seen. Cases also were apparently preyed apart with a screw driver.

Re: Vespa Ciaos intake drilling

Whoa and whoa!!!! What size is the opening? 6mm?

Re: Vespa Ciaos intake drilling

There were a bunch of models with 7mm carbs in both the US and abroad; that's what I'd guess.

https://myronsmopeds.com/wp-content/uploads/2015/06/Info-Vespa-7.jpg

Re: Vespa Ciaos intake drilling

That would make sense Brian. Thanks.

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