Question about 1982 Honda CX 500 B

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What is part no for cx500 custom 1981 synthetic bung washer for spark plug drain hole

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The rubber oil gasket that keeps oil from pouring past the valve cover onto the spark plug is part number 12329-415-000.

Posted on Dec 29, 2010

  • dazpitch Dec 29, 2010

    thanks mate very helpfull many thanks daz


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Where is the bung to drain out diesel been put in my car

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1979 Honda CX 500 A misfires badly

Hi, Anonymous and the usual suspects are:
1. Severely discharged or a damaged battery should have 12.5 volts or more and be able to pass a proper "LOAD" test if necessary, you may have a cursory reading of 12.5 volts or more but little or zero amperage the battery is faulty and must be replaced, AGM batteries fail in this scenario more so than lead acid batteries.
2. 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.
3. Spark plugs in bad condition or partially fouled.
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5. Spark plug gap too close or too wide.
6. Faulty ignition coil, module, and or sensor.
7. Loose, dirty, or corroded ignition module connector at crankcase.
8. Faulty CKP or CMP, MAP, ETS, ATS, TPS, O2 sensor.
9. Dirty air filter.
10. Intake air leak.
11. Water, dirt, or rust in the fuel system.
12. Carburetor contaminated, sticky float, plugged jets.
13. Carburetor vacuum diaphragm torn, cracked, not seated or installed improperly.
14. Multiple carburetors out of sync.
15. Fuel filter clogged.
16. Old or contaminated fuel.
17. Fuel tank vent system plugged or carb vent line closed off.
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20. Carburetor controls misadjusted.
21. Incorrect valve timing.
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For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
Honda CX500 Ignition Problems Tech Corner Motorcycle Classics
Honda CX500 Shop Manual
Honda CX500 CUSTOM Owner Manual

May 24, 2014 | 1979 Honda CX 500 A

1 Answer

What is a bung

from what i understand a bung is a type of plug used to seal of the drain hole in a barrel or bucket. often you here of bung plugs being used in whiskey barrels.

Dec 30, 2011 | Dimplex CS1205 Electric Compact Heater

1 Answer

You told me about part no 12329-415-000 spark plug drain washer can you tell me how to replace step by step and would i need new rocker cover gasket or can i use old one and when finished how tight do you...

hi, the rocker cover gasket can be reused if is not damaged in any way you may want to apply a small amount of sealent to it, when tightening the rocker coverbolts when you feel them stop use only a slight amount of pressure to tighten, as they tend to break when overtightened, i am not sure what part you refere to exactly but if you mean the ruber ring that fits in the rocker cover then this is a simple job, do you have oil leaking from the weep hole in the side of the cylinder head?this ring fitted to the rocker cover stops this,

Dec 30, 2010 | 1981 Honda CX 500 B

1 Answer

Just got cx500 custom 1981 leaking oil when i start up from small hole on side of cylinder what do i do

If the oil leak is coming out of the spark plug drain hole , the inner valve cover seal is leaking or not installed correctly. Take out the two bolts holding on the valve cover and remove the cover. If the valve cover gasket has silicone on it , pick off all the silicone and put the gasket and cover back on. That should fix the problem. Silicone on the type of gasket can make it leak. If the gasket is hard or cracked replace the soft rubber gasket and put it on by itself with no extra sealant.

Dec 24, 2010 | 1982 Honda CX 500 B

1 Answer

How do i remove the seat on a 1981 Honda cx500?

The deluxe model has two latches one on either side of the seat, if you flip both levers at the same time and lift, the seat will come off. The custom model has two bolts that hold the seat down, near the back, one on each side. Remove the side covers, take off the seat bolts and lift the back of the seat pulling toward the rear of the bike.

Sep 06, 2010 | 1981 Honda CX 500 B

1 Answer

1981 CX 500 B: 1981 Honda CX500 idles at about 2500 rpm. How to ...

under the carbs there is a little black screw turn this by hand anti clockwise until 1-1500 revs if this doesnt work the choke may not be going all the way off or pilot screws under float bowls in recess been adjusted too far screw gently all the way in DO NOT over tighten then unscrew approx 1.5 turns out on both carbs if your experiencing flooding from carbs the bowls need to be removed and the pilot jet attached to the float needs replacing hope this helps steve

May 17, 2010 | 1981 Honda CX 500 B

1 Answer



Just checking.... it is a manual gearbox?

You may need a special tool for the drain plug and a 17mm allen key for the filler (some use the special drain tool for the filler as well)

The drain plug is located under the diff housing.

The filler plug is located on the left (nearside) off the gearbox (look to the left of the hole and you can see the 17mm hex filler bung).

Check you can undo the filler bung, then drain the gearbox oil.

Refit drain bung and fill gearbox through filler/level ********* until gearbox oil is up to the level of the filler bung.

Refit, test drive, check for leaks and retest level again when cold.


"If this has helped you in any way, please rate this solution" :-)

Jan 27, 2010 | 1998 Volkswagen Passat

1 Answer

Need to lower

try a cut down seat instead.

Sep 01, 2009 | 1981 Honda CX 500 B

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