Question about 1992 Suzuki VX 800

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Leaking upper valve on a 1992 VX800 how to fix Help please

Ok Ive been threw this bike pretty thoroughly and have figure out that the rear cylinder has a oil leak...I go threw about a quart every other week or so and it smokes when warming her up and when I throttle up...then after a few miles it clears up ...Now I thought it was just worn out rings and even seen it in suggestions....that may be part of my problem but it cant be the main leak...because when she sits for more than 10 20 minutes and I fire it back up it smokes a lil and clears up. So my diagnosis is a valve or seal leak in the head . Can any experienced motor head that's dealt with this help me if there's an easier fix than tearing down my rear cylinder head ? Please help she's my every day rider and mode of transpo

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Hi, Corey you want the cold hard facts, your bike is 25 years old and your top end is worn out and needs to be rebuilt end of story. For more information about your question and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
Suzuki GS500 Top End Rebuild Part 1 of 4
1990 1993 Suzuki VX800 Workshop Manual Repair Manual Service Manual... $10 cheap
OEM parts for Suzuki
Suzuki VX 800 1992

Posted on Mar 23, 2017


6 Suggested Answers

  • 2 Answers

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Posted on Jan 02, 2017

  • 152 Answers

SOURCE: oil leak from the front of the motor

Its funny you should mention this but yes, I had its bigger brother the GS 850 G , same problem, Apparently, in my situation I did the same thing and went to the shop and let those butchers make it worse !!!, the way i found my leak was by washing the motor with a grease and oil cleaner , strayed the whole motor and wash it all off totally, then I turn her on and let her get to operating temp went for a few mile and came back and checked it, for me it was the head gasket   the guys put on and i forced them to do it again,  I found out later that it was common with the suzi's of that model and ended up doing it myself, I used the original gasket and used a compound called gasket goo and it never leaked through out the 8 years i had it . But before you do anything , surly they gave you warrant y on the work so take it back and demand they do it properly.
Cheers and ride safe

Posted on May 18, 2009

  • 1392 Answers


You need to get some new float needles, and have the carbs cleaned and the float heights set correctly.

Posted on May 30, 2009

  • 311 Answers


it sounds to me like the carb float levels are out of adjustment and it is overfilling the bowls,or,the needle valve seats are worn and leaking,which will allow fuel to continue filling the bowls even though it looks like they are closed,remove the carbs from the bike,remove the bowls,turn the cabs upside down close the floats(push them right to the top,this simulates full bowls)then blow throgh the fuel inlet pipe,if you can hear air escaping from around the seats they are faulty,also check that the seats themselves are tight in the carb body,i dont know why but gsxr carbs seem to shake the valve seats loose..hope this helps

Posted on Jul 04, 2009

  • 921 Answers

SOURCE: 99 GSX600F idles badly, belches smoke

i think your right!! take your drain plug off and drain some oil out....look at it condition does it have small bubbles in it does it smell funny or look like a milk shake?
if it does you probably have a cracked cylinder wall.

Posted on Sep 16, 2009

  • 430 Answers

SOURCE: valve cover gasket

The rocker cover gaskets can be changed with the engine installed. There are some low profile tools available to make getting to some of the bolts easier.

Posted on Nov 30, 2009

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I have a 1992 yamaha seca 600.Bike was parked for 2 years.I cleaned carbs 2x.Bike idles fine ,but when I give it a little throttle it dies..Please help...I bought this thing to go to work..Ive put a lot of...

Sounds like you still have a fuel delivery problem...How did you clean the carbs? The jets, pilots, floats and circuits in these carbs are hard to get throughly clean. I use a small steel guitar wire to clean with...A tiny pin hole in the diaphram, or dirty or stuck choke circuit will cause problems.The floats need to be set correctly... I recommend an ultrasonic carburetor cleaning for best results. Consider installing carb kits, they are not very expensive and come with new jets, float valve needles and gaskets...The bike has been sitting 2 years, did you service the fuel petcock and flush and clean the gas tank?
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These are good bikes, just take your time and go over it. She will be back on the road again in no time. I hope this helps---Good luck with your bike!

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2 Answers

Valve cover gasket, how to replace?

Rocker Arm (Valve) Cover REMOVAL & INSTALLATION 2.3L 4-Cylinder Engines
  1. Disconnect the negative battery cable.
  2. Label and remove the spark plug wires.
  3. Remove the attaching bolts for the valve cover.
  4. Remove the valve cover from the cylinder head. If necessary, lightly tap the valve cover with a soft hammer to aid in removal. To install:
  5. Thoroughly clean the valve cover and cylinder head gasket mating surfaces.
  6. Install the valve cover on the cylinder head using a new gasket.
  7. Tighten the valve cover bolts to 14 ft. lbs. (20 Nm) in a crisscross pattern.
  8. Install the spark plug wires.
  9. Connect the negative battery cable.
  10. Start the engine and check for leaks. Fig. 1: Valve cover and gasket assembly 90953g12.gif
2.8L 6-Cylinder Engine
  1. Disconnect the negative battery cable.
  2. The following steps are necessary if your car has A/C and if you are removing the passenger side valve cover, if you do not need to remove the passenger side valve cover, skip them.
    1. Remove the A/C compressor belt and the compressor from the mounting bracket located on the passenger side of the engine. Do not remove the lines from the compressor.
    2. Place the compressor with the lines attached on the passenger side front shock tower and secure.
    3. Remove the compressor bracket.
  3. Remove the air cleaner-to-throttle body hose.
  4. Label and remove all necessary electrical and vacuum connections.
  5. Remove the attaching bolts for the valve cover(s).
  6. Remove the valve cover(s) from the cylinder head(s). If necessary, lightly tap the valve cover with a soft hammer to aid in removal. To install:
  7. Thoroughly clean the valve cover(s) and cylinder head gasket mating surfaces.
  8. Install the valve cover(s) on the cylinder head(s) using new gaskets.
  9. Tighten the valve cover bolts to 11 ft. lbs. (15 Nm) in a crisscross pattern.
  10. Install all necessary electrical and vacuum connections.
  11. Install the air cleaner assembly.
  12. Install the A/C bracket (if removed).
  13. Install the A/C compressor and belt (if removed).
  14. Connect the negative battery cable.
  15. Start the engine and check for leaks.
2.3L and 2.4L 5-Cylinder, and 2.9L 6-Cylinder Engines The 2.3L and 2.4L 5-cylinder, and 2.9L 6-cylinder engines have a two-piece cylinder head, the upper half and the lower half. The upper half is basically the same as a valve cover, except that it incorporates the bearing caps for the camshafts into the underside.
  1. Disconnect the negative battery cable.
  2. Remove the spark plug access cover.
  3. Label and remove the ignition coils and vent hoses or the distributor cap and wires if equipped.
  4. Check the cam alignment before removing the cylinder head.
  5. Remove the bolts attaching the upper cylinder head.
  6. Remove the upper cylinder head, lightly tap with a soft hammer if necessary. To install:
  7. Thoroughly clean the upper and lower cylinder head gasket mating surfaces.
  8. Apply liquid sealing compound to the upper cylinder head mating surface. WARNING
    Use a roller or your finger to spread sealant, do not use an excessive amount of sealant, or the oil passages could become clogged.
  9. Place the upper cylinder head onto the lower cylinder head.
  10. Check the cam alignment before tightening the cylinder head.
  11. Install Volvo tool number 5454 or equivalent to the upper cylinder head.
  12. Tighten the nut on the tools to seat the upper cylinder head.
  13. Tighten the upper cylinder head bolts, beginning from the center out to 13 ft. lbs. (17 Nm).
  14. Install the ignition coils and hoses or the distributor cap and wires.
  15. Install the spark plug access cover.
  16. Connect the negative battery cable.
  17. Start the vehicle and check for leaks. Fig. 2: Remove the clamp and detach the vent hose 90953p66.jpg
    Fig. 3: Remove the spark plug cover and the plug wires or ignition coils to access the retaining bolts 90953p80.jpg
    Fig. 4: Remove the retaining bolts 90953p72.jpg
    Fig. 5: A light tap with a soft-faced hammer is usually required to loosen the valve cover 90953p81.jpg
    Fig. 6: Carefully lift the upper cylinder head up and off the lower section. Note the integral camshaft bearing caps in the casting 90953p82.jpg
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1 Answer

When I apply the brake pedal the rear brakes donot work. However my front brakes do work fine. On the 1992 Buick Road Master is there a special valve in the master cylinder? no brake fluid is leaking from...

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