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Bringing a 78 GS 550 back to life. . .

  • Thread starter Thread starter Guest
  • Start date Start date
I get the point, or not. . .

I get the point, or not. . .

Well, this sucks. I've pulled the pilot fuel jets out and 2 of them have been squashed. I don't believe I'm guilty of this, trying to be careful when reinstalling a couple of months ago. If that's true I evidently didn't pay much attention at the time to their condition.

My concern now is have the ends of these embedded themselves permanently in the body. As BT has suggested, time to search. . .

KRYTYdF.jpg
 
You can get the broken pieces out. Just take a very sharp awl or pick, open up the tops of the carbs and push the broken pieces out. I just had to do one on my carbs. It takes a good amount of force to get them out but they will come out!
 
You can get the broken pieces out. Just take a very sharp awl or pick, open up the tops of the carbs and push the broken pieces out. I just had to do one on my carbs. It takes a good amount of force to get them out but they will come out!

Thanks bro, that's good news if I can find some replacements. :rolleyes:
 
I've searched for an answer as to whether the pilot fuel screw should have a spring on it? I don't find it on the BB fiche. Could that be because it's adjusted at the factory and not to be disturbed?

This is the item I'm wondering about:


pfYdoOg.jpg


I've checked with Z1, and Partszilla and can't seem to get an answer. I think they think I'm asking about the fuel/air screw which we all know does have a spring on it.

Thanks for any thoughts.
Mike
 
If you had looked at the VM carb rebuild tutorial, you will find the answer on page 5.
You can get new pilot fuel screws from Z1, they're listed for Kawasaki and have a longer head.
The answer to your spring question is yes. Look carefully down the hole in the carb and they might still be in there.

And, I believe there's a tutorial on removing the broken tips on Basscliff's site
 
Thanks BT, I've removed the tips on carb 2 & 3. And thanks for your quick response. I appreciate knowing about the Kawasaki reference. Actually, I saw page 5, saw the spring, but could NOT get an accurate response from Z!, or any of the other vendors as to carrying this spring, so, I began to question whether the VM 22 used a spring or not.

I'll give them a call. Thanks again.

ps: Here's Z1's response: (This spring reference number they gave me is for the Fuel/Air, not at all attached to the picture of the Pilot Fuel screw I sent).

Good morning Mike,


Unfortunately, we do not carry the spring you are in need of. I did some searching and it looks like partzilla.com has them in stock. Below I have attached the OEM number, you can use that to search on their site.


OEM #: 13268-01010


Thank you,
Ethan


Z1 Customer Service Team
 
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That's a good idea. I tried it before and even at it's shortest length the needle just wouldn't go down far enough to start the threads. I figured the spring diameter is too wide.
It would be great if someone had a part number for this spring.

Looking at Bike Bandit, Babbitt's I'm not even seeing the needle, much less the spring:



wg1cuKy.jpg
 
I also have three good carb bodies sitting on the bench, as I just got done dealing with this problem on my bike. Some genius catdog broke off the tip in the #3 and it took wallowing out the hole to get the nib out. So...i have #1, #2, and #4 carb bodies with their requisite parts lying around if you just need a carb body swap.

FYSA - Theres several ebay companies that sell reproduction screw sets but they cost half as much as a bank of used carbs.
 
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The last couple of weeks I've been adjusting the carbs. Small adjustments to get the right fuel in the bowl without having it overflow.

zdAT1Nn.jpg



n4XA7ym.jpg



The carbs are installed on the bike, getting good spark, timing is spot on, but it just won't start. :mad: Puzzling to say the least.
Spark at the right time in an atmosphere of hydrocarbons should go boom. I had the pilot fuel screws removed and put them back at 1 turn.
My guess is I may have to increase it to 1.5 turns. There is nothing, not even a "pop" or the slightest indication of ignition. Weird.

I may have to use that roll of paper towels in the top picture to dry my tears.
 
Just read all 14 pages, looking awesome! Sorry to hear she still wont kick! I'm also in the middle of a rebuild, hopefully getting the motor in the frame tonight then on to wiring! Good luck with diagnosing the issue, i'm sure someone on here will chime in to help ya!
 
Thanks Track,
I was able to start the bike, BUT I gave up on the original carbs. I tried to get them lined out, but they were pretty rough, and now just good for parts. I bit the bullet and bought a nice rebuilt set off fleabay. I don't like taking shortcuts and pride myself on making things work, but this just wasn't happening.

Here's the new set:

rZIszIR.jpg



And here's the beaters. . .

4kAkZPU.jpg
 
Hi Wangofree. I like your attention to detail! Looking forward to seeing the finished product.

I see you're from Lawrence KS. I'm from the Wichita area but moved to MI a couple years ago for work. Hope you haven't blown away yet, heard there's been lots of heavy storm and tornadoes in SEK. Stay safe!
 
Thanks 93B - No, haven't blown away yet, but glad I built a storm shelter in our garage. Man I feel for everyone living in Oklahoma. They've had it rough, plus Texas and Missouri.

The bike is coming along. I need to find a couple of side panel covers so I can paint them, the tank and rear cowl all at once. I'll post final pictures after that in a month.
 
I'm happy to say that I've been able to fire up the bike and ride it around the block a couple of times.

https://www.youtube.com/watch?v=otoH08yNarI

What's left is to purchase new front brake hoses, side panels, then paint the tank, rear cowl & side panels.

I am also missing a left hand grip. In dismantling the right hand grip I discovered that the throttle tube is broken:

bLDzSgW.jpg


Doing a search for a replacement for the GS550 I find a lot of talk about using a Yamaha R1 tube. No one specifically mentions doing this with the GS550. The only option from Bike Bandit and the ilk are universal tubes with no guarantee of fitment. I don't mind finagling a part, but would rather find a part that wouldn't require too much jury rigging.

So, setting myself up for the wrath of "don't you know how to use search on this forum!?" (yes I do), anyone have a suggestion or experience with a GS550 throttle tube replacement?

Thanks fellas.
 
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