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Re: [R90SWORLDNET] Dellorto vacuum ports.
Re: [R90SWORLDNET] Dellorto vacuum ports.
Richard,
I hope we are talking about the same thing…my carbs all had ports when I got the bikes.
I don’t know about the depth to which the port is installed, but here are a few shots of the left carb from my S. Unlike the Bings, which have the ports conveniently on the outward-facing side, on the Dellortos, the ports are on the slightly less convenient engine-facing side. The hole goes straight in - no angle.
Port: 6mm in diameter and 7.8mm long.
Screw: I don’t have the means to check the thread immediately, but it is ~3.8mm in diameter and has a 7mm hex head.
Hole depth: I stuck a small screwdriver in the hole and it bottoms out ~39mm in, so subtracting the 7.8mm port length, that’s about 31mm to where that internal cavity ends (it’s close to the center plane of the carb).
Lars
Re: [R90SWORLDNET] Dellorto vacuum ports.
Port Clinton, OA, last I heard. They are the US importer of D’ell parts.
They added ports to my D’ells.
Mac Kirkpatrick
On Fri, Sep 1, 2023 at 16:51 Lars Hens via groups.io <lhens=
yahoo.com@groups.io> wrote:
>
> Richard,
>
> I hope we are talking about the same thing…my carbs all had ports when I
> got the bikes.
>
> I don’t know about the depth to which the port is installed, but here are
> a few shots of the left carb from my S. Unlike the Bings, which have the
> ports conveniently on the outward-facing side, on the Dellortos, the ports
> are on the slightly less convenient engine-facing side. The hole goes
> straight in - no angle.
>
> Port: 6mm in diameter and 7.8mm long.
>
> Screw: I don’t have the means to check the thread immediately, but it is
> ~3.8mm in diameter and has a 7mm hex head.
>
> Hole depth: I stuck a small screwdriver in the hole and it bottoms out
> ~39mm in, so subtracting the 7.8mm port length, that’s about 31mm to where
> that internal cavity ends (it’s close to the center plane of the carb).
>
> Lars
>
>
>
> > On Sep 1, 2023, at 1:46 PM, Richard Chawes2 via groups.io <rchawes=
> q.com@groups.io> wrote:
> > Does anyone have instructions how to drill the carbs for vacuum ports.
> I can get the pieces but would be nice to know how deep, what size. I read
> one report the inner hole needs to be at an angle. Need to verify this.
> Looking forwards to great posts on new website.
> > thanks,
> > Richard Chawes
> >
> >
> >
>
>
>
>
>
>