deepwaterimports
Over 1,000 Posts
like a old tiriumph intake ...... nice
Google image search for "XS650 single carb" or KZ750 single carb", etc. There are crazier ones out there of guys doing 4-1 intake manifolds, etc. They make the work ahead of me look simple.tron97 said:As far as Im aware, as long as the intakes are the same length on either side, before the t..it shouldn't run lean..
Where did you find the pictures of the xs intake?
Thanks for that reminder. I think it sits on the same bolt circle as the others, so it should just vent to the outside air without issue (right?).tobiism said:If bolt pattern does fit, you will somehow have to make an opening for the bowl vent in the face of the carburetor. If you cover up that fourth hole with the velocity stack your bowl will airlock.
Autotek said:Been watching your build for a while now and I like everything you have done, except,,, here it comes, the single carb idea. With the amount of time and effort you will have into creating something that is inferior to dual carbs why not just throw on a set of new Mikuni VM34s and kn filters. For around $300 your done and they are so easy to jet and tune. The solid mount between the head and the carb is going to vibrate that single to death and the length of the intake will be a considerable power loss. I know there is something to be said about doing something unique, and it may work well, I just feel like you would see it more if it worked. I inquired about doing the same with my 79 bonneville and my engine guy would not consider it. (atombombcustom.com) Again I really like what you have done and enjoy reading the thread, good luck and I will keep watching.
tobiism said:Sorry but that is just incorrect. I have done what he is proposing and it works very well. I used the same carb on the same engine and had even better usable power than the stock carbs. Nothing shook apart and there was an increase in power by the seat of the pants dyno, not a decrease. Sure the dual mikuni vm's would be a nice addition, but 300 bucks is a lot of money for a bike that usually costs less than that.
I've heard that about stacks too, so I'll keep alternate 'filter' options in mind. Good luck re-working your own intake. The exhaust cam swap is on my future, to-do list, but I plan to get it running as-is first, in the hopes that you'll completely document your swap for the benefit of the rest of us KZ 750 twin owners.tobiism said:Cool man, I have heard that CV's don't respond very well to velocity stacks when the stack is in the turbulent air. Might be something to watch for, maybe a half round cover attached to the front so negative pressure doesn't develop across the face of the stack. I just pulled the manifold out of storage last night and looks like I can bring the carb about 1.5" closer to the head by getting rid of the rubber boots.
Now to see about installing that exhaust cam in the intake spot and retiming the engine!