Hi guys, need some carb help

[Jeff Adams]

Hey Lab3, where did u find a selection?

[Rijko]

On GSR we have/had the "shim club".
I do not know if it's still active but they offered a swap at low cost -
may be worth it to search this forum.

[Jeff Adams]

Tried Z1, but I didn't see a selection, just a few individuals.

[Jeff Adams]

I lied, my browser finally finished loading and they were down a few pages. Thanks for all the info guys.

[Rijko]

Several sellers for complete sets, like K&L and some German companies.
My advice, steer clear of aftermarket ones because of the difficulty putting them in. Thank me later !

This i would buy in a heartbeat if sold on my side of the big pond :

https://www.2040-parts.com/vintage-suzuki-12800-45810-09916-64510-29-5mm-gs-valve-shim-set-tool-gs1100-i254789/

The box is worth the asking price.
Lots of shims AND the valve tool. No-brainer for me. (I have 3 original boxes with original tool and shims so i'll pass on this one)

A propos valve tool : the original Suzuki tool is a good one.
The aftermarket tools i tried were not hardened properly and would be hard to use after a couple of uses.
Original tool is hard to find and expensive.

Did i say what a great deal 2040-parts is offering here ?

[LAB3]

A propos valve tool : the original Suzuki tool is a good one.
The aftermarket tools i tried were not hardened properly and would be hard to use after a couple of uses.
Original tool is hard to find and expensive.

The "zip tie" method works just fine! If you don't know how that works do a YouTube search for Suzuki valve shim zip tie and get a real life demonstration.

[Rijko]

The "zip tie" method works just fine! If you don't know how that works do a YouTube search for Suzuki valve shim zip tie and get a real life demonstration.

I know, used the method on occasion but for this job i prefer the Suzuki tool.
It's just that some tools make doing the job more enjoyable for me.

[Michael Graziosi]

Before chasing many other potential causes, with the engine running, spray starting fluid (quick start) into the suspect cylinder and see if it fires.

[Jeff Adams]

OK, I am obviously missing something here..... my 78 1000 is not firing on cylinder 3. I just shimmed all valves at 2 thousandths clearance, new plugs, swapped the carb bank for a good working set, swapped coils, 145psi compression, sprayed starting fluid all around. I have no idea what else to check here. Am I missing something??

[Nessism]

Does the cylinder fire with starter fluid? If not, you have a spark problem.

[Jeff Adams]

The bike runs on 3 cylinders, no spark issue as I have had 2 different set of coils on it.

[1978GS750E]

Have you checked to make sure you have fuel in the # 3 carb bowl? I had the same issue and the float valve was stuck closed! Just my .02!

[Jeff Adams]

Already had two sets of carbs that ran good on a 750 on the 1000, so it's or a fuel or spark issue.

[Nessism]

Already had two sets of carbs that ran good on a 750 on the 1000, so it's or a fuel or spark issue.

Fuel or spark? That narrows it down!

[Jeff Adams]

The cylinder is getting fuel, spark, and it has good compression. Since I've already set the valves, the only other thing I can think of is something internal mechanical, so I'm baffled.