Newbie needs help. Surprise surprise. :)

[.Solo.]

So I am new to the forum, new to motorcycles and certainly new to my 07 gs500.

So I bought my gs500 last Tuesday and have been riding it ever day. It was running perfect. Great acceleration, purred like a kitten. Then all of a sudden it started dying anytime I gave it throttle. It would idle all day long, but throttle stalled it.

So I decided to rip open the carbs and clean it all out. The float bowls were clean, the jets looked good. I took the plugs out and cleaned them but they looked good as well.

Put everything back together and same problem. I have managed to reproduce the problem consistently. At around 2k rpms the engine pops/sputters. If I am idling under 1.7k and throttle up it dies. If I adjust the idle screw to hover closer to 2k then I get the popping but I can throttle up and actually ride.

So what would cause the popping and why only at this rpms? It was working perfectly.

[jestercinti]

What you describe sounds like a lean condition.  I'd reset the idle screw to be 3 turns out as a conservative starting point.  While we are on the topic of carbs, any modifications to them?  How about to the air cleaner or exhaust?

Try these items:

1. You are doing this with a FULL tank of FRESH gas, right?  You may think that there is enough gas, but looks can be deceiving.
2. Switch the petcock to prime.  Does it still happen?  Prime will tell you if you have a fuel flow issue.  Do you have any kinked fuel lines?
3. How did you clean the carb?  Did you take it all apart, or just spray some carb cleaner in the jets?  There is a difference.
4. Are the carbs on the intake boots TIGHT?  Not a little tight, but real tight.  Air can leak and cause a lean condition.
5. Exhaust header bolts tight?  How do the gaskets look?  This can lean out the condition.
6. If this still happens, try running with the choke slightly on.  Does this change the engine performance?  This will help with lean/rich troubleshooting.

[Alphad0g]

I had the same issue, tore the carbs apart and cleaned them and the jets LOOKED fine to me too. Problem persisted and got worse. Turned out one of the jets was clogged, so I ran a sewing needle through all of the jets when I took the carbs apart again.

And pretty much what Jester said. Make sure you're filled up with fresh gas. Stick around here long enough and you'll see a ton of people who's only problem is their tank being dry 

[weedahoe]

I agree on the lean condition because when mine was lean, it too would "pop"

But for my jets when I cleaned my carbs, I took carb cleaner and put some in a little cup and let them soak in it for a while. Afterwards I blew compressed air through them and made sure I could see through them as well

After putting it back together and 2.5 turns out, no more issues.

[.Solo.]

Thanks for all the info. Here are some answers to your questions:

I completely dumped all the fuel out and started fresh with 3 gallons and some cleaner added.
I also removed the carbs, cleaned the jets and let them soak. I didn't push anything through them, but I could see through them.
Carbs intake boots are super tight and I even double checked them that they are pushed all the way on.
Using the Prime setting or the choke have no effect.
I haven't checked the exhaust headers yet..

I may take the carb apart again tomorrow and hit them with a fine tooth comb just to make sure I got everything. This is driving me nuts.

[jestercinti]

Kink in fuel line easy to do. Check again and do search on fuel routing diagram.
Make sure that fuel shutoff on tank is straight up and down. Not 45*, not 70*...90*.

Plugs new?  Spark strong?  I'd check that.
While carbs are out, check orings. They are important.

Edit: float height check.

[adidasguy]

Did you turn the tank fuel valve back on?

[.Solo.]

Well after all the cleaning and checking and everything else. I think I comes down to it running to lean. The P/O put an aftermarket exhaust on and a K&N drop-in filter but never re-jetted. Also the fuel/air mix was almost 5 turns each side. So I added some washers, readjusted the mixture and ordered new jets.

So we shall see after that. I did check for leaks and couldn't find any. The issue only really happens at 2k-2.5k and only on deceleration now.

So here's hoping.

[the roach]

imalso having a similar issue. my gs pops alot on deceleration and i have to rev up to about 5k to take off down a stopped position...i also have to feather the throttle to take off or the bike  i have cleaned the carbs but original ownr has a k&n filter that barely f its in the space provide...and had put a dc sports muffler on it that looks like an exhuast tip for a car? anyways any thoughts....choke does help a little at least to take off from a stop..

[BockinBboy]

imalso having a similar issue. my gs pops alot on deceleration and i have to rev up to about 5k to take off down a stopped position...i also have to feather the throttle to take off or the bike  i have cleaned the carbs but original ownr has a k&n filter that barely f its in the space provide...and had put a dc sports muffler on it that looks like an exhuast tip for a car? anyways any thoughts....choke does help a little at least to take off from a stop..

Classic lean condition.  Too much air, not enough fuel.  You can try adding washers under your needles, but you'll probably need a rejet with that air filter.

- Bboy

[the roach]

thanks i just ordered a kit from buddha cant wait til it gets here.

[Higgins13]

thanks i just ordered a kit from buddha cant wait til it gets here.

What is difference between Buddha kit and dynojet?

[BockinBboy]

What is difference between Buddha kit and dynojet?

Dynojet kit requires drilling out the jets.  Buddha's does not.

- Bboy

[Worm]

So I am new to the forum, new to motorcycles and certainly new to my 07 gs500.

So I bought my gs500 last Tuesday and have been riding it ever day. It was running perfect. Great acceleration, purred like a kitten. Then all of a sudden it started dying anytime I gave it throttle. It would idle all day long, but throttle stalled it.

So I decided to rip open the carbs and clean it all out. The float bowls were clean, the jets looked good. I took the plugs out and cleaned them but they looked good as well.

Put everything back together and same problem. I have managed to reproduce the problem consistently. At around 2k rpms the engine pops/sputters. If I am idling under 1.7k and throttle up it dies. If I adjust the idle screw to hover closer to 2k then I get the popping but I can throttle up and actually ride.

So what would cause the popping and why only at this rpms? It was working perfectly.

The problem I have with the situation is that you say it was running perfect for a few days and then all of a sudden started acting up. If that's the case, the lean condition from the PO wouldn't be the problem. Unless it was acting weird the whole time and the excitement of a new bike blinded you to it. I don't have a suggestion as to what it could be but thought this should be a part of the troubleshooting so we don't diagnose it as one thing when it's clearly something else.