Question about 1983 Suzuki Gs 550 L

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In have a 1985 suzi gs550e it starts but only

In have a 1985 suzi gs550e it starts but only runs shortly ,cleaned carbs,cleaned tank and petcock ,new oil an filter and plugs ,but still wont run more the 10-15 secs at a time

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I have an intermittent petcock problem with mine, check that. It has a vacuum switch in it that can stick

Posted on May 18, 2010

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Sounds like a fuel supply prob....have you opened the choke to see if will run ??

When you say "cleaned carbs" did you mean removed / stripped / refitted?? If not do so.

Posted on May 13, 2010


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Good spark clean carb and tank. Wont even backfire or try to start.

Hi, Pete and the usual suspects are:
1. Fuel tank empty.
2. Fuel supply valve/petcock turned off.
3. Fouled spark plugs.
4. Engine flooded as a result of overuse of the enricher.
5. Vacuum hose to the fuel supply valve/petcock disconnected, broken, cracked, or pinched.
6. Fuel valve/petcock or filter clogged.
7. Discharged battery, check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
8. Loose or corroded wire connection at the coil, battery or plug between ignition sensor and module.
9. Spark plug cables in bad condition and shorting, cable connections loose, or connected to the wrong cylinders.
10. Ignition timing incorrect due to a faulty ignition coil, ignition module or sensors (MAP, CMP, CKP, O2 and/or BAS).
11. Security alarm needs a reset.
Good luck and have a nice day.

Nov 19, 2015 | GAS Motorcycles

1 Answer

I have a 2003 polaris/330 trail boss with a fuel problem. i had carb rebuilt at a shop .cleaned, new needle & seat installed. new plug, carb vent/ equalizer cleaned, tank vent clean. starts fine, runs...

there's a vent on the carb they might've have missed, the line could be clogged. insects and mud get in them. plus it could be the petcock on the tank. take it out and make sure the screens, are cleaned etc.

Apr 21, 2017 | Polaris ATV

1 Answer

Does a pit **** ever go bad or just cleaned?

I'm going to guess that "pit ####" meant petcock :-) and yes they do "go bad" in a number of ways. There is a diaphragm inside which can crack over time. There is also a diaphragm return spring which may break (I've seen only one like that though). But most often, the use of fuel with ethanol in it will cause the breakdown of the plunger seal. When that happens, the petcock "leaks".... not externally but internally. The Maxim-X has a vacuum operated petcock which is supposed to only provide fuel to the carbs when set to PRI (prime) or when set to ON while the engine is running. When the engine is off, there should be no flow of fuel. But the damaged plunger seal allows fuel to flow from the gas tank to the carbs at all times, even when the engine isn't running. When you combine that leak with a leaky float valve, the result is usually a crankcase full of gasoline - clearly not good. If you'd like to know all there is to know about the XJ700X / XJ750X petcock, visit the following page on the Maximum Maxim-X web site:
Maximum MAXIM Resource for 1985 86 Yamaha 700 750 Maxim Models XJ700X...
There are also some helpful tips for rebuilding the petcock here:
...with supporting pictures here:
Index of pix petcock
Hope that helps.

Jan 15, 2014 | 1985 Yamaha XJ 700 X Maxim

1 Answer

How to clean gas tank and carburator of old gas

Get some carb cleaner and get that carb dismantled and sitting in that carb cleaner for a few hours. Drain that tank and run some approved gas tank cleaning agents all through it. Take the petcock off and check/clean out and usually - there'll be a filter type set up either attached to petcock or on inside of tank. The carb, the petcock and the tank - get them right before you even try to start it.

Jan 05, 2014 | 1997 Honda VF 750 C Magna

1 Answer

Hi, my description is lengthy, but I tried to provide as much detail as possible for troubleshooting. I'm seeking technical input re: a continuing carb issue w/my '96 Magna, which would not turn...

Reserve tube is usually set at a 1 gallon level in the tank, if you only added a gallon to an empty tank,I would fill the tank at least half full, If that doesn't fix the issue then replace the petcock, It's not a carb issue if it runs fine in reserve.

Jun 28, 2011 | 1996 Honda VF 750 C Magna

1 Answer

Hi I have bought a 1985 700 maxim watercooled it has been sitting for appr 2 years today I took carbs out, disassembled them, cleaned them w carb cleaner and put them back in in addition to that I...

If I understand "the petcock was in prime position and it eventually quit dripping."
Prime = on
Sound like the needle rubber was hard and after a while they soften up enough to cut off the fuel.
Keep an eye on it and ride safe.

Feb 02, 2011 | 1985 Yamaha XJ 700 X Maxim

1 Answer

Bike sat for a long time with fuel in tank. Tank was previously sealed. I changed spark plugs, tore apart and cleaned carbs. It will only start for a few seconds if i spray starting flued in the air...

stored gasoline begins to deteriorate/lose octane/after only two weeks.drain fuel tank label and disconnect fuel lines at petcock,remove petcock from tank,clean fuel,check for supply to carbs. Honda's of that vintage have a seperate 'reserve' tank under the battery,which tends to collect all the 'crud',and must also be purged.trace your fuel lines to see if your unit is so equipped,

Oct 10, 2009 | 1985 Yamaha XJ 700 X Maxim

1 Answer

Will not start if it sits overnight.

turn the petcock off when you park it and run the fuel out of the carb if it starts the next morning when you turn the gas valve on change the petcock

Apr 27, 2009 | 1985 Honda CX 500 B

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