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
If you like our site, please consider joining our club!
By joining you will help ensure that we can continue to provide this service
JOIN HERE!
By joining you will help ensure that we can continue to provide this service
JOIN HERE!
Re: [R90SWORLDNET] Dellorto vacuum ports.
-
"Mac Kirkpatrick"
Re: [R90SWORLDNET] Dellorto vacuum ports.
You can purchase the needed parts to add these ports from Hermy’s BMW in
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
> >
> >
> >
>
>
>
>
>
>
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
> >
> >
> >
>
>
>
>
>
>