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two different gs550es questions

  • Thread starter Thread starter Hooptie
  • Start date Start date
H

Hooptie

Guest
1. The warmer temps have brought to light an issue with the bike. It seems like it has an off idle stumble. Also, when i come to a stop off the highway, it acts like it is trying to flood. Not when you stab the brakes, but when you come to a full stop. Idle screw set too low?

2. I swear the choke on this bike is for looks. I went to cold start it when it was about 85*f and the choke refused to catch.

Other than that, it is a flipping hoot to ride.
 
The secret lies not in your choke but in your many orifices.
Clean them carbs and check your intake manifold pipe o-rings
 
It runs fantastic once it holds an idle. The carbs were rebuilt by the previous owner, and i trust him. I will dig into the o rings as i hear they are perpetually an issue.

And you leave my many orafi out if this
 
How long are you letting this warm up mine takes at least 5 mins of runtime even in warm weather.
 
Kansans don't know latin.

While we're talking wacky siamese bore mikunis, i have a spare set, how hard are they to correctly rebuild? I would love to set them up for maybe a k&n and some emgo dunstall replicas.
 
The carbs are really quite simple. They are effectively two carbs in one body.
All the bits are readily removable. There are dynojet kits for the bike as well as a OEM airbox fitting K&N filter.

I have been thinking of doing the stage 1 kit for a while now.

Your US sec bike has smaller mains thanks to the EPA. I think they are one size smaller.
 
In 85F weather it should start instantaneously with no choke at all. Clean and adjust your carburetors.

If it's hard to start adjust your valves. If it's not hard to start do it anyway. They need it.
 
Valves were completely adjusted literally 100 miles ago.

I am probably going to clean the carbs though. It just runs so damned nice once warm though....minus the off idle hesitation.

the bike did sit for a while before i bought it though.
 
JEEPRUSTY said:
How long are you letting this warm up mine takes at least 5 mins of runtime even in warm weather.
Click to expand...

5-10 minutes as they are horribly cold blooded. The issue arises when i try to keep it running since the choke refuses to catch, then think it does and i walk away...then it dies and acts like its flooded. Then it has to sit with the air filter off to air out. THEN it fires right up.

Vindictive contraption.
 
So i took it out for a ride today and as usual, hard to start. I rode to a friends house to fix her mower and upon returning to the bike, it flat refused to start. It went so far as to crank like normal, then act like it was locking up, then cranking fine again. I poked around and it started cranking again.

On a whim i shot it with starter fluid and it fired right up.

What am i missing here? It continued to have a bit of a stumble on the way home, but that cleared up too. AND once home, i had the courage to shut it off and lo and behold it fired right up. Three different times. Crap getting dislodged in the carbs? I noticed it had an inline clear filter, perhaps thats an issue?

I want to start riding it to my office, trucks and mustangs are greedy gas pigs and its too nice to be in a car. Buuuut i just don't the bike yet.
 
My 650 had an inline fuel filter when i purchased it and it was a pain !! Seamed to restrict the gas flow to much !! Once I removed it the bike started and ran 100?/○ better ..
 
There's already a filter in the petcock and a filter in the carb bowls themselves.
 
Hooptie said:
1. The warmer temps have brought to light an issue with the bike. It seems like it has an off idle stumble. Also, when i come to a stop off the highway, it acts like it is trying to flood. Not when you stab the brakes, but when you come to a full stop. Idle screw set too low?

2. I swear the choke on this bike is for looks. I went to cold start it when it was about 85*f and the choke refused to catch.

Other than that, it is a flipping hoot to ride.
Click to expand...
You know, the almost dying and hot start issues sounds like electrical/intermittent electrical issue. On it's own makes some sense, but that you can give it a shot of starter fluid and it runs again points to something in carburetion.

I might trust a PO, but I wouldn't necessarily trust a carb "rebuild" as being perfect. The off-idle stumble might also be addressed by shimming the needle.
 
Hooptie said:
5-10 minutes as they are horribly cold blooded. The issue arises when i try to keep it running since the choke refuses to catch, then think it does and i walk away...then it dies and acts like its flooded. Then it has to sit with the air filter off to air out. THEN it fires right up.

Poory maintained contraption.
Click to expand...

It's not the bike.
 
What size fuel line is on the bike? I'm at my office and am planning on grabbing some SAE line on the way home.

And probably a can of starter fluid.
 
Hooptie said:
Clever. Things I know are new on the bike.

Fuel lines
rebuild carbs (confirmed yesterday when the PO came by)
air filter
adjusted valves
Click to expand...

Please take this as being constructive and not a bashing. You know nothing about what has been done correctly unless you've done it yourself. I know that you say that the PO was a trusted person, but even trusted people can make mistakes. Clearly your bike is not running correctly. All the issues you've been having point straight to a carb, petcock or valve related problem. Take the time and do as others have suggested. Verify valve adjustment and make sure that your petcock is not leaking fuel with the engine off or leaking fuel into the vent line. A bad petcock can lead to many "fuel related" issues that look like a carb problem. If the petcock proves out to be good then I'd still perform a complete carb rebuild. There is no way to "verify" that the carbs were rebuilt correctly. If you insist on not doing it then let me change this message....

Hooptie said:
Clever. Things I know are new on the bike.

Fuel lines
rebuild carbs (confirmed yesterday when the PO came by)
air filter
adjusted valves
Click to expand...
So I guess your bike is running perfect.;) Have a great day!
 
Last edited:
No no no. I'm not trying to be difficult. I promise.

I am starting simple. No fuel pulling into the vent, thats bone dry. And it will run on either prime or on position. No leaks though. I am going to replace the fuel line from the carb to the petcock after work today. I have my fingers crossed.

Would the starter getting hot from cranking cause the lumpiness i was experiencing trying to turn it over?

I rode the bike 10 miles home after it came back to life with starter fluid, it layed over a bit around 7k when i jumped on it to see if it would act up. It didn't die, there was a huge flat spot.
 
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