TOPIC:

Settle an argument for me. Is it possible to convert a 2 carb sysetem off of a twin to a single carb? Are there any performance advantages? I'm just going to sit back and await your responses.

I've seen pictures of a 4 cylinder Kawi with a single carb before. Don't know ant details or if it ran better?

Wildh2oskier wrote:

Settle an argument for me. Is it possible to convert a 2 carb sysetem off of a twin to a single carb? Are there any performance advantages? I'm just going to sit back and await your responses.

Not a stupid question at all.
Triumph T100 came in single and dual carb flavors.
Little Y shaped adapter for the single carb.
IIRC dual carb setup is pair of 26mm(or inch equiv) and single is a 28mm.

For a 750 you could machine as a top and bottom useing some 7/8" plate and it will be plenty strong. If just experimenting, some copper plumbing fittings will do the trick.

I've been running a 1.5" bore Zenith-Stromberg (CV type) not an SU, carb on my 650 for a couple years now. I made the manifold using 1" copper tubing pieces I cut and soldered together. Then I used a 1.5" brass fitting to mount the carb to it. That fitting took some doing the get it to match up with the 1" tubing,,, God I was I had something more than common hand and power tools,,, maybe a machine shop,, .
But, I have been pretty happy with the outcome, better mileage, more low end torque and only one adjustment for the mixture. I started out with a carb off a 1500CC Triumph, car not bike. Then I got a NOS carb off a 1300CC something or other, I can't remember what it was from, off Ebay. When I contacted the seller about it and asked him some questions and told him what I was doing with it, he sent be a bunch of spare parts for it including a package of 4 diaphrams it. I don't know if it was my imagination or what but that one made it run even better, I don't know if it was because it was jetted for a 1300CC and that just happens to be 2 times the capacity of my 650 and the bikes rev about 2 time what car does but, it's working good and I'm enjoying it.
I had to do it just because I was told it couldn't be done. I just enjoy a challenge I guess.
Ride and Wrench Safe

Post edited by: The Milkman, at: 2007/07/22 18:46

You have any pictures of that settup there Milkman? I'd like to see them.

Thanks, Wes

Here is a link to a thread in the archives about it:

I'll try again,

Click here

Post edited by: The Milkman, at: 2007/07/22 19:03

Here is a pic of it mounted on the bike:

Another try:



Post edited by: The Milkman, at: 2007/07/22 19:10

Another:

And my choke lever, actually a bicycle shifter,,

The Milkman wrote:

And my choke lever, actually a bicycle shifter,,

Have the same style choke lever on both my T100's
It's amazing what can be done when one starts thinking....
"how the hell do I do this/make this work" rather than, "where can I find a part for a 1939 whirlpool gas washing machine".

milkman that looks pretty good considering, especially the bath tub plug chain, nice work Mcgyver!! Thats really cool that you put that together.

That's an original picture,, I've modified the linkage to use a pivot from the rack on a spare set of mikunis I had, that way I use the original push pull cables ,, but I still use a chain to pull the carb linkage,,
I'll get a picture taken of the new setup and post it.