Twinmax

[essjay]

Got myself a Twinmax but the tubes are too wide to fit over the vacuum nipples on the throttle bodies.

In the box there's a few brass nipples (oh... er...). Is it just a matter to somehow unscrewing the OEM ones and replacing them with these brass ones? If you how do you unscrew the OEM ones? Pliers, vise grips????

 

[kostas_patra]

what is your bike?

if i remember correctly twinmax tubes are 8mm. you can buy an extension tube of 6mm, then cut it in two and force it in twinmax tubes and tb nipples
costless

 

[MattW]

Wot Kostats says

Don't, under any circumstances, attack your TB's with vice grips

 

[cookie]

try pinching up the tubes with a pair of small zip ties.

 

[essjay]

i'll try the cable ties. So whats the point of the extra brass nipples?

 

[trotsky]

I got a bit of plastic tube in my Twinmax box which works as an adapter to reduce the diameter to fit - it was in the titchy ziploc bag with the other adapters. I cut it into four so that I wouldn't lose it all at once - I have three bits left.

 

[kostas_patra]

twinmax is not for oilheads and bmw only, it can help synchronise most motorcycles with injectors or carburators and these extra nipples are fitted directly where a screw is unscrewed under the carburator

 

[essjay]

Right, I think I'll get some tube to narrow it down.

From what I can see the Twinmax rubber hose is O.D.: 9mm, I.D.: 6mm and the brass nipple on the throttle body is 5mm.

So to narrow it down, what size hose should I get? O.D.: 7mm, I.D.: 4mm to ensure snug fits?

I presume any old hose would do? I think DIY manometers are made from aquarium hose.

 

[dancata]

I used to own a Twinmax. Bought it myself when I was in USA. Funny thing, these are made in France, then shipped to USA, then back to Europe

Anyway, 4mm ID of a hose should do

I now use a clear hose with oil inside it and get the same effect as the Twinmax