0
Could the petcock on a motorcycle allow to much fuel to the carbs and cause them to flood?
Wiki User
∙ 16y ago
Sounds more like the needle and seat valve may need adjusting or replacing
Wiki User
∙ 16y ago
Add your answer:
Earn +20 pts
What does the letters eri on a motorcycle petcock mean?
I think you may find that the letters ar Pri - Prime - the position of the petcock that will allow fuel to flow freely all the time. Should only be used when the carbs are empty of fuel (eg when carbs have been drained or bike not run for some time. Leaving the petcock in this position may lead to hydraulic lock in the cylinders if your carb float valves do not seal perfectly. So only use it in this position to refill carbs if they were thought to be empty.
As I had turned the gas switch off on my Yamaha 400 Big Bear and forgot to turn it back on then drove it until it stopped and now I can't get it to start even with gas and choke on what can be wrong?
The petcock requires the vacuum of a running engine to stay open. Because you ran the carbs dry you now need to bypass the vacuum system to allow the carbs to fill. Turn the petcock to prime (PRI) and leave for about 30 sec. If it starts, move petcock to on.
When starting the motorcycle it runs for a few minutes then starts stalling and will not keep running?
weak fuel pump or ground.. if fuel injected if carberated prolly the vaccum line going to back of petcock.... petcock maybe clogged and or bowl valve sticking check clean vaccum system /hoses and carbs you have a fuel problem
Where is the Fuel filter on an 1983 Yamaha xj550 seca?
If there is one it will be located from the main fuel line running from the petcock to the carbs.
Where does the gas hose connect to a 1982 suzuki GS650 mikuni carburetor?
I have a 1982 Suzuki GS650L, and I learned the connection of the tubes the other day when I took the tank off to repaint it. There are three tubes that connect to the petcock, which is the valve on the bottom of the gas tank. When you are on the left hand side of the bike looking at the tank, you will see two places on the right hand side of the petcock. The gas hose connects to the connector on the petcock in the front, not the back. The other one is for the vacuum on the carbs. There are two distinctly different sizes of tube connectors on the petcock, and you will see a slight difference in the tubes coming to the petcock. The gas hose goes from the petcock in between carbs two and three (the very middle) and connects to a valve on the carb. You will see a gold looking nub that you have to connect the tube to.
Will riding a motorcycle after winter damage the engine?
if you left fuel in the tank over winter it could block up the carbs,bike could run for a while then die on you .happened to me ,wont make same mistake again.
How do I tune up my 4 carbuerator Dune Buggy?
You need a carburetor synchronizer to get all four carbs drawing equally. Go to any Japanese motorcycle shop for one that can deal with four carbs.
1983 suzuki GS750 ED Why no fuel flow from carburetor to engine?
Probably a bad fuel petcock on the bottom of the tank. It is vacuum operated so it will not flow fuel unless the engine is running. (Safety feature) My older '79 GS has a "prime" setting on the petcock that allows the fuel to bypass the vacuum shutoff and run straight into the carbs (thus filling the floatbowls should the engine not be able to start due to lack of fuel in the carbs.) Either you have a bad petcock or you are checking it in the "ON" position. If you have "prime" it should flow fuel without a problem. If not there may be dirt in the petcock or other internal problems. Hope this helps. Mark in NE Indiana. _____ I just fixed my 1983 GS750E which had a fuel flow issue with the petcock. After disassembly of the petcock it was found that the fuel valve o-ring would tack itself to the sealing surface, thus, not allowing fuel to flow. See this forum posting for a how to fix: http://www.thegsresources.com/_forum/showthread.php?t=141244
How do you drain the gas tank on a Yamaha virago 1100?
Pull the hoses off the carbs, stick the ends in a gas can big enough to hold all the gas in the tank, and turn the fuel petcock to "reserve."
How does the vacuum work on the petcock suzuki vinson 500?
The petcocks are vacuum operated petcocks. This means that they have a little diaphragm and valve set-up in them which responds to engine vacuum and allows fuel to flow only when the engine is running and supplying vacuum. This is is how things work when the petcock lever is set to the "on" or "run" setting. So we see that the "on" setting is actually the "off" setting when the engine is not running. So if the engine quits for any reason (as in a "down" situation), the petcock(s) will automatically close and prevent the fuel from flowing out. These petcocks also have two other lever settings: The "prime" setting bypasses the vacuum function and allows fuel to flow at all times, even when the engine is stopped. The purpose of this setting is to allow the carb float bowls to be filled when the engine is not running. Note that if you run your petcock(s) on the prime setting all the time, you lose the safety feature provided by the vacuum petcock. Note also that on this setting, fuel is prevented from flowing out through the carbs, into cylinders, etc.) only by the float valves in the carbs, which close when the carbs are full. Should one of these float valves stick open or leak, you then get flooding through that carb. The "reserve" setting is used to access an additional amount of fuel when you start to run out. Here is how this works. These petcocks have inlet towers which stick up into the tank. In the "on" position, fuel flows down to the petcock through an opening high on the tower. So when you "run out of fuel" you actually have some more fuel sitting in the bottom of the tank which lies below this high inlet. When you turn the petcock lever to "reserve", a lower inlet near the bottom of the tower opens, so you can gain access to this last bit of fuel in your tank.
Petcock positions for 1982 maxim 750?
This isn't technically a question, but I'll take a stab at answering what I think you're asking. There are three positions on that bike's petcock. They are: On, Res, and Pri. Meaning regular tank, reserve tank and prime. There's no Off because the petcock is vacuum driven, meaning if the engine isn't running, there is no vacuum, so the petcock is off, it doesn't need a setting for that. On is what you use normally, Res if you run low on gas, Pri is only used if you want to get fuel in the carbs without the bike running for some reason, or draining the tank or something. Some people use that setting if their petcock is bad, because you can run it that way if you have a vacuum leak caused by a bad diaphragm, but it can cause some problems, flooding, etc. Hope that's what you needed.
How do you rebuild Honda motorcycle carbohydrates?
Find an actually rebuild kit for those carbs and its really just changing out the jets in the bowl and springs here and there, for the most part.
