A true brain stumper. Carb guys please reply

[nejeff]

83' GS450GA is what I am working on. Got aggressive with carb spray and blew out the parts from the crossover/accelerator pump chamber (no iidea what it is called or what it actually does). Here are pics with everything intact, both bowls have this. Retaining spring, brass piece about 3/8" long under it and a tiny steel ball bearing underneath that. I need another brass piece and bearing and the both retaining springs. I will post pics of brass pin and bearing tomorrow.

Parts diagrams do NOT show these parts, at least not that I can find (see pic or parts outlaw). I have a whole other bike so I am not in desperate need but semi-desperate as I want to have both sets useful.

Anyone ever seen these parts before or no exactly what this crossover between carb bowls does?v1.jpg

[nejeff]

Another picv2.jpg

[nejeff]

Parts fichev3.jpg

[Steve]

Would you believe that you already described it?

There is one accelerator pump. The crossover tube is so it will discharge in both carbs.

The brass thingies, along with the springs and balls are check-valves. When you twist the throttle, you are turning a cam that pushes down on the rod to activate the pump. The pressure generated by the pump overcomes the springs, allowing gas to flow past the balls. When you stop twisting the throttle, the springs push the balls back into place, to be ready for the next squirt.

It has been many years since I have seen that setup, and it's ONLY on the 450GA.

.

[nejeff]

Would you believe that you already described it?

There is one accelerator pump. The crossover tube is so it will discharge in both carbs.

The brass thingies, along with the springs and balls are check-valves. When you twist the throttle, you are turning a cam that pushes down on the rod to activate the pump. The pressure generated by the pump overcomes the springs, allowing gas to flow past the balls. When you stop twisting the throttle, the springs push the balls back into place, to be ready for the next squirt.

It has been many years since I have seen that setup, and it's ONLY on the 450GA.

.

Bummer, was hoping it was on other GS bikes that I was just not familiar with. As you can see parts fiche doesn't even show the parts so probably hard to find replacements unless i make my own

[Cipher]

can you still buy the bowls? One assumes if they are integral and not listed that the bowls come dressed with them.

[TxGSrider]

Are those Keihins or Mikunis?

[nejeff]

Are those Keihins or Mikunis?

Mikunis.

I don't think the carb bowls are something you can buy anymore Cipher

[fbody_mike]

https://www.klsupply.com/carb-fuel/accelerator-pump-rebuild-kit-for-kz650-kz1000.asp

18-2903_n.jpg
Looks like k&l makes them for the kz1000. Might be worth a shot.

[Cipher]

by golly I looked all over for the bs34 fitted to yamahas. Elite search skill on your part.

[nejeff]

https://www.klsupply.com/carb-fuel/a...650-kz1000.asp

[ATTACH=CONFIG]55991[/ATTACH]
Looks like k&l makes them for the kz1000. Might be worth a shot.

Those look like the parts, damn high priced little bits. Got to try and find some used ones

[Cipher]

yikes 28.99 per carb? alas youll be less liberal with a jet of carb spray in futire.

[Ricks34]

Did you ever get the replacement pieces for the carb?
I am missing the same parts.

[nejeff]

Sorry my friend, haven't been on this site in a long time. Yes I did, I took them out of a Kawasaki carb but can't remember which one, this was 4 years ago now. Someone suggested once to me to run without them, not sure how that would work. Check Ebay, maybe you can find the parts there

[Nessism]

Pretty sure I've got some of those parts if anyone is in need.