BST-36 carb questions

[scott-s]

 I have a set of BST-36 carbs from a '96 GSX-750F. 

 

 The throttle cable seems to have a little too much play in it, even when the slack is taken out. I'm used to seeing two lock nuts on the cable at the carb end. I tried slipping one over the end of the cable but it won't fit over the barrel. I also looked at the diagram and it only shows one nut. There is a place on the carb rack for the nut to be held captive. If I try to back out on the large adjuster nut at that end, then the cable is loose at the carbs. What am I missing here?

 

 

 Also, where does the fuel line attach? There are four T fittings. The top two are obviously vents. At first, I thought that the fuel line went on the two lower Tee's, but the diagram shows them as open vents.

 The diagram shows a line attaching to the RH side of the carbs. I see a barb there. That line has a TEE in it also and just seems to dead end on the diagram. How, exactly, do these carbs get fuel?

 

[Gixer1460]

The lower tee's are the fuel supplies to the float bowls - the hoses are indicated on the tap drawing (doh - sensible place!) You have two supplies from tap or if tap has one outlet just run to another tee and split to two.

Does the carb cable mount have a thread in it or plain hole? If threaded then screw in cable adjuster and lock with single nut? Usually only double nut if a plain hole ie. one below and one above.

[scott-s]

 The carb cable mount is just a plain hole. There's a "cross bar" that the entire rack mounts to. On the underside of that rack is a countersunk hole in the shape of a nut. To hold the nut captive. To get the cable tight at the carbs, I had to screw the larger barrel type nut all the way in.

 The throttle works OK, but I can roll it forward and the end of the sheathed cable will slip out of the holder at the handle bar end. It's **almost** adjusted correctly, but not quite.

 

  Fuel tap only has one outlet, so I'll have to get a T. 

 What are #16 and #21 in the diagram? Vacuum for the petcock? If so, I guess I need to find a nipple for the outside of #4 carb.

 

 And while we're at it, how do you vacuum sync these carbs? I don't see a place to hook up gauges. 

[Gixer1460]

I believe the diagram shows vac hoses that would connect to a vac powered emissions system (limited market fitment) whereas most will have a single line to the vac. fuel tap? The carb tops  have a bung covered spigot - front / right on each usually for vac. sync'ing.

[scott-s]

 Ah, I see... I saw those before but I thought they were hard plastic. Just went out and squeezed one and I see that is indeed rubber.

[scott-s]

 I guess I still need to check that #4 carb body. See how the #16 hose attaches? Need to make sure that's not open to a vacuum leak.