Intake Manifold Barbed fittings

[Shelboss]

Does anyone know where I can get some barbed fittings to replace the screws in the intake manifolds for hooking up gauges? I believe they are metric barbed fittings, which are not easy to find in the US.

[Finnpaso]

They are metric and i made such from allen screws with boring hole throught it. I use under screws such spacers, what have rubber in other side, that there will be no leaks, Simply and function, like trains toilet....

[Laddie907]

yes, this was a pain in the ass...

similar to Finnpaso - I drilled out some 5mm (from memory??) metric screws and fitted to the vacuum lines.

the problem becomes screwing the f$%^&ers in and getting them firm.
they are also hard to crimp properly in the vaccy tube [ended up using glue].

options:
drill a 25mm long screw and put a nut on it (and snug the nut up) - this will test your skills with a hand drill.

a Ducati shop made some neat ones out of bundy tube (brake line steel tube); they had little "snugging" collars on them; the tubes were long "L" shape (like an allen key) and could be tightened lightly but sufficiently...the rubber hoses slipped over the tube ends after fitting.

I have been considering making some of the same...

[Shelboss]

So it's not just me! I made a set from the threaded portion of a metric screw. The hole was done on a drill press, so not too badly off center. I don't like the fit without a shoulder so I put the screws back when done tuning. I will see if anyone makes these, or oder some from you Laddie if you want to ramp up production

[ducbertus]

one day soon I have to set my idle running as well and check the balance between front and rear cilinder. this means I have to make screws to connect the lines.
As I have lathe I can make some more for people who are interested.
didn't look for dimensions so far, but I think to start with 10mm hexagon stainless steel bar.
thread the 5mm, add a bonded seal and a hose connection on the other side.
I already bought already some gauges to measure the vacuum. So, I'll finish the set.

ducbertus

[samandkimberly]

Does anyone know where I can get some barbed fittings to replace the screws in the intake manifolds for hooking up gauges? I believe they are metric barbed fittings, which are not easy to find in the US.

I can help you with that - I work for a company that has lots of metric fittings. Can you check the thread size and tubing ID? I really don't want to pull off my panels just to find out. My guess is that they're M5, and the tubing you're thinking about pluging in is 1/4"/4mm ID. Something sort of like this?

http://catalog.festo.com/enu/asp/Defaul ... 2256&L=001

I probably have a few in plated steel kicking around which should be fine; remind me then meet me at Moto Market sometime and I'll give you a couple. Stainless ones are about $4.00 ea; I'd have to actually order them.

Sam

[samandkimberly]

Wow - I didn't read through the whole thread and see what a PITA this is for everyone! Let me try one on my bike next week just to be sure (though I already am sure) then I'll send to anyone for the cost of shipping. The plated ones have a pretty good zinc plating on them and cost me about a buck. If anyone wants the premium SS ones I have to order them in bags of 10.

Incidentally - if you can find a 10-32 threaded fitting it is interchangeable with an M5: the threads are close enough and the engagement is so short you can barely tell the difference.

[Shelboss]

Hi Sam, they are 5 mm x .8 screw thread, the barbed end depends on the gauge being hooked up. My Mercury tubes are 3/16". Let me know when you have some and we can meet up, thanks
Art

[samandkimberly]

Hi Sam, they are 5 mm x .8 screw thread, the barbed end depends on the gauge being hooked up. My Mercury tubes are 3/16". Let me know when you have some and we can meet up, thanks
Art

I've got 4 of them in my hands. We can meet up at Moto Market tonight, or email me your address and I'll throw them in an envelope and send them to you. Once you validate that they work I'll take a show of hands for anyone that wants a set.