Help! Carburetor/fuel mixture problem (I think) 1979 GS1000

[Nessism]

It's good to know that Suzuki CV carbs can build up enough vacuum without an air box to provide it, and "Pods' will work. They won't work on Kawasaki bikes, or on my Kawasaki ZZR1200, and tons have been written on that. No vacuum, I wonder where the Diaphragm gets is suction. The Mikuni VM link I gave was pretty comprehensive. Hope you checked it out.

I don't know about the ZZR1200, but MANY bikes with CV carbs can be tuned to run with pods. It's just that some are more difficult than others. Obviously, it's the bikes with sidedraft carbs that are applicable for pods, not the modern race bike stuff with downdraft carbs.

And again, purchasing a Dynojet kit shortcuts most of the trial and error involved in the process. One thing that helps greatly is a more tapered needle.

https://www.dynojet.com/jet-kits/

[Suzukian]

I will defer on your knowledge, as it is quite extensive. On the Kawasaki forum I belong to, I helped a guy out by just mounting the pods on long tubes. The extra 5 inches or so created enough of a drop in pressure that allowed his diaphragms to move their full range. Personally, if I had the money, I would put flat slides on all of my motorcycles, but I don't have that kind of money. My ZZR was a "Barn" find. Kept in a temperature controlled room, it has only 4875 miles on it. The guy was 6'4" tall, and purchased it as his first bike. It terrified him, and he parked it. A friend convinced him to sell it, and I got it for $2200 dollars. I don't think he knew what he had. The shop had just rebuilt the carbs and tuned it up.

The ZZR1200 is so insanely fast, the need to modify it seems ludicrous. I did remove the 50 lb. catalytic converters, and with what I put on, removed 40 lbs. of weight off of the bike, I think it looks better too. Those are Radiant Exhaust tips on the end, and the inside has a long baffle with Ceramic Cloth wrapped around it. I think it looks better than the stock can, but the weight savings was why I changed it. The stock pipes are available for cheap on EBAY.

zzr1200-exhaust mod.jpg

Stock:

[Suzukian]

Stock ZZR1200 with stock exhaust:

2003-Kawasaki-ZZ-R1200a.jpg?d=1&i=1.jpg

[Big T]

Thanks for the info on the carb cleaning page, but that is for the CV carbs. My bike has the VM carbs. If there is a similar resource for the VMs, that would be awesome.

Go to the Gssrchive.bwrimger.com page and you'll find the VM tutorial on the right side of the page

[Rich82GS750TZ]

The link Big T meant to post is here: https://gsarchive.bwringer.com/

Or, it's the fist link in my signature. Lots of goodies on bikeCliff's Website for anyone with a 70's-80's Suzuki GS. You want the VM Carburetor Rebuild Guide. Below the Manuals section along the right hand side, 3rd link down. Or, here's a direct link:

https://gsarchive.bwringer.com/bikecliff/images/vm_carb_rebuild.pdf

[rmantell2012]

The link Big T meant to post is here: https://gsarchive.bwringer.com/

Or, it's the fist link in my signature. Lots of goodies on bikeCliff's Website for anyone with a 70's-80's Suzuki GS. You want the VM Carburetor Rebuild Guide. Below the Manuals section along the right hand side, 3rd link down. Or, here's a direct link:

https://gsarchive.bwringer.com/bikecliff/images/vm_carb_rebuild.pdf

Awesome, I appreciate your time and help. Looks like it’s time to get back to work!