40mm Tripple Webber Air Horns

[fightyourself]

I own a 40mm sk racing set of tripple webber, I was wondering if anyone has the tripple webber air horns for sale? I need 6 of them thanks. please leave me a email for send me a message. thanks a bunch!

Happy Hoildays Guys!

Ker

[HS30-H]

Hi Ker,

One thing that you will need to look out for is the difference between the 40DCOE Weber air horns / trumpets and most of the others..........

You say you have "40mm sk racing set of triple webber" - so I think you probably have the later SK ( Sanyo Kiki ) version of the Mikuni Solex carbs. If this is the case, then the Weber 40DCOE type of air horn / trumpet will NOT fit them.

The 40 DCOE Weber uses an extra sleeve on the air horn to locate the Auxiliary Venturi in the body of the carburettor. The 40mm carbs by Dell'Orto, Solex, Mikuni-Solex, SK, OER and others DO NOT HAVE THIS EXTRA SLEEVE on the air horns, and they have a FLAT mounting face. The 45DCOE Weber has the flat mounting face too - so its the 40DCOE that is the odd one out.

The good news for you is that the 'flat' mounting face type of air horn / trumpet is far more common than the old Weber 40DCOE type, so you should not have too much trouble finding them.

You might also like to be careful about sizing. You can find trumpets that will interchange between 40mm and 44/45mm carbs, but it is better to stick to the correct venturi size for your carburettor. If you bolt on the trumpets for 44mm SK's onto the 40mm SK's then you might actually notice a drop in power. Try to match the bore of the trumpet mounting face with the bore of the auxiliary venturi and the carb body. Apart from that you will have to decide the length of the trumpet; in most cases a shorter trumpet will work better at high flow / high rpm, and the longer trumpets work better at lower flow / lower rpm - which aids torque.

Good luck!

Alan T.