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76 kz750 twin petcock stuck open

The petcock is stuck in RES position, wont budge

Posted by Anonymous on

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6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: new sentry csw3813 stuck open

Remove the screw from the backside of the door.

Posted on May 22, 2008

  • 583 Answers

SOURCE: Cordless Drill, Keyless Chuck stuck in full open position.

if chuck is wide open ,look down inside there should be an allen screw or bolt at the bottom of the chuck it should undo anti clocwise and the chuck comes off

Posted on Aug 18, 2009

woobie dog
  • 1273 Answers

SOURCE: Black and Decker Cordless Drill Chuck stuck in full open position

I'd put penetrating oil in it and tap the chuck with a plastic hammer. That should free it up.

Best rgrds, W/D

Posted on Aug 18, 2009

SOURCE: have 1979 kawasaki kz750 twin, how many turns on

Your bike's engine is back firing ..this could be because of low level of fuel in the float chamber.
If you have cleaned the carbs , please recheck and reset the float chamber level.
Secondly both of the carburators have to work exactly at the same time..if they dont it will also kinda back fire and have uneven idling...check this too.
As for the air mixture screw .. once all is fine ....tighten the screw slowly all the way in to the last thn unscrew about 2 and half to 3 turns outwards .....you will notice the improvement of the idling.... its adivseable to check the valve clearance and reset them to specs.
Hope this helps!

Posted on Sep 27, 2009

  • 1 Answer

SOURCE: What is the off position for the petcock

up (res) is reserve, down(on) is primary, center(marked as pri is for prime, used for if ran out of fuel or drained the carb or been sitting for a long time). There is no off as the fuel system is vacuum fed instead of greavity)

Posted on Jan 03, 2010

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1 Answer

2002 Vulcan 1500 Classic has fuel pouring from the overflow tube that leads from the carb and routes down by the battery.


bad needle for the float control
there is a small rubber insert on the needles and over time it dries out and cracks

Apr 12, 2017 | Tank Motorcycles

1 Answer

Fuel leaking


Hi there are there three positions on the fuel petcock pri,on, res? and the fuel keeps flowing in all positions if so there is dirt or the o ring is no longer seating properly replace the fuel petcock diaphram or clean the petcock of any material not allowing it to fully close.

Oct 26, 2012 | 1997 Suzuki GSF 600 S Bandit

1 Answer

Bike starts only with throttle fully opened


1. carbs may not be cleaned correctly; should be totally disassembled and put in a carb cleaning solution or taken apart and all jets/orifice passed through with the proper drill jet size (most people do not have the jet drill or wire size to go through small jets as they can get smaller than .010 inch diameter).

2. float or needle&seat can be out of adjustment, stuck open, or bad; replace the floats/needle&seat or adjust them according to manufacturers specifications which can be found in a service manual. The needle will sometimes have a small spring loaded plunger which should move up and down freely when pressed with the finger. The float(s) should swing freely on its pivot shaft.

3. it may have a vacuum style petcock which is not shuting off properly. Remove the fuel line(s) from the fuel petcock and turn the vavle to on or res position. Take the smaller hose (if its vaccum controlled) and draw a vacuum on it with a hand held vacuum tool or your mouth and gas should flow from the petcock each time a vaccum is applied and stop when the vacuum is removed. If gas is flowing without a vacuum applied to the valve and the valve is in the "on or res" position, then the valve is faulty and should be serviced or replaced.
4. the inside of the tank has rust in it and needs to have a rubber tank liner kit installed in it to stop the rust from continually going into the carb; a filter normally will not stop rust from entering the carbs so a liner kit must be installed or replace the tank if there is a lot of rust.

Jul 24, 2012 | Motorcycles

2 Answers

Fuil in air box getting in oil dr200se year 2005 have carb soaking now olny 500 miles cant be worn may be the dry rot o ring in pet **** so far all the diaframs good in pet **** and diafram in top of...


What you are dealing with is a vacuum petcock with a bad vacuum diaphragm , in this case fuel is bypassing the petcock via the vacuum line and filling the engine (oil) with gasoline.
If you have a standard petcock that is leaking (not shutting off properly) or just left in the on position a stuck float needle will also fill your engine (oil) with gasoline. This can happen with a clean carburetor and a good float needle. It just sticks and you have to change your oil. If you have the kind of fuel petcock that allows you to turn it off when not in use , always turn off your gas when not riding.
You will have to change your oil if it is fouled with gasoline. I suspect a vacuum operated petcock is at fault. With standard petcocks I have seen new motorcycles in perfect order stick a float needle ( Kei Hin Carburetors ) and fill there engines and air boxes with gas/oil mix. On vacuum petcocks the diaphragm that shuts off the fuel flow is usually leaking and at fault.

Jan 01, 2011 | 2001 Suzuki DR 200 SE

4 Answers

What position on the petcock is on off or res on a 93 katana gsx600f


There is no OFF, you have RES toward front , ON is all the way down, and prime toward back, PRI is used when it has been sitting for awhile. RES and ON wont let gas out unless bike is runnig. There is a vac hose on back of petcock that lets ON and RES work it must be connected..

May 29, 2010 | 1993 Suzuki GSX 600 F (Katana)

2 Answers

What is the open position for the fuel petcock...parallell to the ground? Or is is it perpendicular...basically which way is ON, OFF, RESERVE?


The petcock on your bike is supposed to be one of the vacuum operated type petcocks. When the engine is started, the vacuum from the engine is supplied to a diaphragm on the backside of the petcock open the fuel valve. It may have been changed since these valves were notorious for problems.

Your petcock should be labeled "ON", "OFF", and "RES" if it's a manual petcock. There should be and arrow on the lever on the petcock as well. This is the best advice I can give without being able to look at the petcock. I hope it helps. GOOD LUCK and ride safe.

Apr 01, 2010 | 2001 Harley Davidson FLSTF - FLSTFI Fat...

1 Answer

The fuel wont go through the lines to get it started


You're bike may be equipped with a vacuum operated petcock. See if the fuel valve has a "prime" position on it. If so, put it in this position. If you still don't get any fuel to the carb, you'll have to remove the petcock from the tank and clean the screen or unstop the petcock. I'd put a manual petcock in and block the vacuum line.

If you already have a manual petcock and you're not getting fuel, remove the petcock, clean the screen, and blow air through the petcock in both the "On" postition and the "Res" position.

Nov 17, 2009 | 1981 Yamaha XJ 650

3 Answers

I need a wiring schematic for a 1976 KZ750


the library has mc books sec 629or get ahold of clymer or haynes manual

Aug 10, 2009 | 1976 kawasaki Z 750

1 Answer

Took hose off the petcock and turned the bike over but no gas


I would take the vacuum and main fuel lines off and just, pardon the expression, **** on it to see if the fuel will start to come out from the petcock outlet. Also check the position of the valve to make sure it is in the "on" or "res" and not "off". Duh. It happens.
If that doesn't get it then the petcock needs a rebuild. If the fuel line or vacuum line is clogged or the carb floats are stuck closed you will also get no fuel. Check it all out with patience and curiosity. It's an easy fix.

Jul 30, 2009 | 1985 Suzuki GS 700 ES

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