1982 CSR 750 (KZ 750 - M1) fuel questions

Hi all, I need am putting back together a 1982 Kawasaki CSR 750 (KZ 750 - M1). I just got most of the wiring done and now I need to get the tank and fuel lines ran back where they should go and let her run. I see three spots where lines hook up on each carb.

On the first sport there is a T pipe on the bottom that connects the two carbs and has a nipple in between the carbs, I need to know where this one goes.

The second one is another identical T pipe setup between the carbs that is a little higher, I don't know where this goes either.

The third spot is a smaller nipple on top of each carb that is hooked up to a smaller hose that comes up to a T fitting that connects to the hose that comes off the top of the other carb, so on that T fitting I have two small hoses and an open nipple on on one side of the T, I don't know where this goes either.

On the fuel petcock there is two nipples a larger one on the bottom and a smaller one on the side.

I know that might have came off a little confusing so if you have any questions let me know. But if someone could look at there bike and let me know or if you know of a fuel map diagram somewhere that would be awesome.

You have two hoses that come off a fitting on the left hand side of each carb, right above the float bowl, that are angled toward the back, those lines connect to the large spigot on the petcock. The other lines are vacuum, one for the petcock, and one for the switch for the emissions stuff (plug the holes in the head, use a 76-89 750 twin cam cover, throw the emissions stuff away).

You may or may not have drain hoses for the carbs, if so they will be two smallest identical hoses, and not connected to each other or anything else.

A pic would make things so much easier

Here I found a pic

part numbere 95005 and number 95005A are the first two spots. I can't find a good pic of the nipples near the top of the carbs that are connected to a T with the smaller hose.

Where's Ron Jones when you need him (he has the same bike while mine is a 82 motor with 79 carbs in a 70 750B)?

Those carbs are the BS34's while mine are BS38's, but I'll do my best.

That T between the carbs at the front is at the same relative position as the fuel inlets on my 79 carbs, so it's most likely the fuel inlet that goes to the large spigot on the petcock.

The petcock on your bike is vacuum operated (the small spigot) so it needs a vacuum hose attached to it (that's one of the two small hoses that T's into both carbs), and that's probably going to be the longest small hose.

The shortest small hose probably goes to the vacuum switch for the emissions stuff, that one can be removed and the ports on the carbs capped, if you connect the two spigots on top of the cam cover together with a larger hose and throw the vacuum switch in the trash.

Ron Jones has the same bike (others do also) and knows these carbs real well, maybe he'll read this soon and correct me as needed.

You need a Suzuki RE5 to go with your avatar, that way you'll have both a rotary powered car and a rotary powered bike

steell wrote:

The petcock on your bike is vacuum operated (the small spigot) so it needs a vacuum hose attached to it (that's one of the two small hoses that T's into both carbs), and that's probably going to be the longest small hose.

You need a Suzuki RE5 to go with your avatar, that way you'll have both a rotary powered car and a rotary powered bike

I have been looking for a Suzuki RE5 but they aren't cheap, and if I was going to spend that kind of money for an older bike it would be on a Kawasaki H2 2-stroke.

Just to clarify now, where does the small nipple on the petcock go, the small T that comes from the top of the carbs goes to the small fitting on the petcock? The part number 92005A is just a vent. And part number 92005 is the main fuel feed line.

George4 wrote:

Here I found a pic

part numbere 95005 and number 95005A are the first two spots. I can't find a good pic of the nipples near the top of the carbs that are connected to a T with the smaller hose.

Wow, thanks for the vote of confidence, Steell:)
Ok, had to go out and look at mine. The line from the bottom, large T, goes to the large outlet on the petcock, fuel feed. The line from the top large T is the overflow, line. It gets routed down and behind the swingarm. The lines from the vacuum nipples on each carb, go to the small T connection and that line is routed to the small nipple on the petcock, for vacuum. Since I've removed all the emissions junk, and capped the valve cover reed valves, I'm not sure about the emissions vacuum. I think the vacuum hoses for the emissions switch was taken off the same vacuum nipples as the petcock vacuum.
Simplify your life, get rid of the emissions, cap the reed valves. Right now I'm not using the petcock vacuum, have both carb nipples capped and using prime for fuel flow. I'm thinking of just capping one carb nipple and seeing if the vacuum petcock will work w/the vacuum of just one carb.
Hope this helps, and if you decide to junk the stock airbox, I know how to make these carbs work w/pods:)
Good luck, ya got a good bike.

OK thanks a lot, I will put it together tomorrow and try to go for my first little spin on her. I will let you know if I decide to get rid of my air box so I can try some pods. Thanks.
~George

Good luck, I took a look @ my old emissions stuff, there was another small T connector, on the vacuum line, going to the petcock, that goes back to the vacuum switch going to the airbox.