Motorcycles typically have a valve on them with an OFF ON and RESERVE position. When you go to start it it is flooded and you have to hold it wide open and spin it over 10-20 seconds before it begins to come to life.

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Some motorcycles dont have petcocks and instead have gas gauges indicating remaining fuel.

Motorcycle fuel shut off valve positions. Taking off with the valve in the off position. My yam has an onoff mark right on the petcock. Did this on my DRZ and my brothers Katana and it solved the issue.

The reason why it ran like a champ when you shut the fuel valve is because as the float bowl runs out of gas the air-fuel ratio is leaning out. LowesHomeDepot valve and a piece of hose for 4-5 and be done with it. Use pri prime to bypass the vacuum circuit With the engine shut of all 3 positions flow fuel.

But you say that you put a. On off and reserve. An engine thats running lean will always make more power than one thats running rich.

Fuel shut off valve. Ive been told by the local dealers maintenance folks that newer carbed bikes with the valve really dont require the fuel supply valve be closed. My first Intruder 800 went 135000 miles my second one has 64000 and counting.

Recent shut off valves dont have an off position anymore its been replaced with PRi which is primeThe petcock lever has a long side and a short sidewlong side pointed down that is ONlong side up that is RESERVEhalfway between is PRIME which is used when cycle has sat for a long time or has. Fuel tank shut-off valve position reserve Functiondescription. The Suzuki valves are famous for leaking.

The Owners Manual also states that you should. Click to see full answer Subsequently one may also ask should Turn Petcock off. It has at least three positions.

Reserve means reserve tank and off means no fuel available from either tank. A petcock that has reserve has a small tube inside the mesh filter that sits up higher than the bottom of your gas tank. You can have fuel in the tank and not be able to use it because the valve is in the ON position not RESERVE.

But the fuel will flow in the prime position. The petcock is not vacuum operated it is a simple three-position manual valve and te bike has an electric fuel pump. Turn it off when youre not riding it and never worry about it again.

Its a vacuum operated valve. The reserve position accesses the bottom portion of the fuel tank. With the exception of when I pull the fuel tank off the bike for maintenance I have never once turned the petcock to off on either bike even when it sits for months while I ride something else.

The valve positions for a manual petcock are on off and usually reserve Vacuum petcocks are less important for this discussion since they are usually left in the run position and are opened and closed automatically by the engine vacuum of a running or not running engine. You can find a pdf in google if you do a search or you can ride around with the petcock in all 3 positions with a small gas can on the back and. Most older motorcycles have a three-position fuel petcock valve known as a petrol tap in the UK mounted on or nearby the fuel tank to control the supply of gasoline.

So do not leave those units in prime. This symbol is part of collections ISO 7000 Graphical symbols for use on equipment. Best fix is to put a shut off in line between the existing valve and the carb.

I see the ON OFF RES on the valve but since there is no indicator mark I dont know where to position the valve. Posted on Aug 13 2009. The previous owner must have broke the lever and he put a small hose clamp on it so it could be turned.

The difference between run and reserve is the length of the fuel delivery tube that brings fuel out of the tank. ON OFF and RESERVE. On motorcycles and mopeds to indicate the reserve position of the fuel valve function.

Leave it in the on position with the motor not running the fuel should not flow. Most bikes have a Fuel Petcock Valve on the engine to shutoff the supply of gasoline. The fuel shut off has three positions runreserve and off.

When the engine shuts off the vacuum is removed and the fuel shuts off. One of the replies did address the bike in question. As its been said you can ride for a distance with the fuel off.

The normal run tube rises about 35mm from the bottom of the tank. ON RESERVE PRIME ON is the position for normal operation and the position you return to after refueling the bike. Ive taken the attitude that they can leave their carbed bikes valve open.

Typically there are three positions to choose from. This is something I will fix soon. This valve also has three positions.

Some motorcycle fuel petcocks offer a reserve function. The off setting is used when trailering your bike. Standard motorcycle fuel petcocks and universal fuel petcocks have two positions.

The petcocks that require a vacuum should not allow fuel to flow in the run and reserve position. On means you are using the main tank. It is the same tank the valve dictates whether you are ON or on RESERVE.

Newer fuel injected bikes do not have a petcock there is nothing to turn off. The rider turns the petcock to RESERVE when the reserve area of the gas tank is reached.


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