Spark plugs only last 2 days - Honda Rebel Forum
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post #1 of 23 Old 10-31-2019, 10:14 PM Thread Starter
 
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Spark plugs only last 2 days

So i had to open a new topic as i couldn't modify the existing one, sorry about that. Anyway at first i thought only my left spark plug have lots of carbon , on brand new instated plugs , but then i realized its both sparks plugs that get the carbon real quick, i mean , i take them off to clean them and im back to riding, engine runs so smooth and so nice its hard for me to believe he rings are gone, although the engine spills white smoke only when it starts, once the engine warms up, the smoke goes away, so i wonder for the more experienced riders or mechanics out here, could it be that the carburetor its running rich or lean? Or the white smoke at start its a sign of the rings? Valve problem perhaps? what should i look for to fix this? thanks for any help and pardon my bad grammar, English its my second language.
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post #2 of 23 Old 10-31-2019, 10:48 PM
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Wet and dry compression tests on each cylinder will identify or eliminate a number of things, including bad rings. Have you adjusted the valves recently? That may also help eliminate some possibilities. White smoke is gas, blue smoke is oil.

Compare your plugs to this chart and tell us which condition they most resemble. Spark Plugs

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post #3 of 23 Old 10-31-2019, 11:25 PM Thread Starter
 
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Quote:
Originally Posted by flitecontrol View Post
Wet and dry compression tests on each cylinder will identify or eliminate a number of things, including bad rings. Have you adjusted the valves recently? That may also help eliminate some possibilities. White smoke is gas, blue smoke is oil.

Compare your plugs to this chart and tell us which condition they most resemble. Spark Plugs
number 3 for sure, and ill post a picture tomorrow as well, ive been reading about "Carbon Fouled" some say carb problem ,some say, valves, so im not sure, ill just wait for advise here.
Edited to upload pics, i clean the plugs this morning, this picture was taken at nigh, one looks ok the otherone black, but on the morning they both where black. so i gues one burns faster.
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post #4 of 23 Old 11-01-2019, 01:36 PM Thread Starter
 
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So inspecting the carb myself, i realised the Shock was on all the times, the bike does not have a shock cable but it has the little plastic cober on the carb side, i took it off and saw the shock was there, using a tool i took it off and now the carb gets way more air and runs way more faster at iddle. It moved the iddle knob to make it runs slower, but even with the knob all the way down bike seems too acelerated at iddle, i wonder if there are any ohter screws that can help slower down the rpms at iddle, i stole a pick to explain wich knob im talking about. Anyway im arun the bike like that a few days to see if that helps with the spark plugs and the white smoke too.
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post #5 of 23 Old 11-01-2019, 02:10 PM
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There is a screw that controls the air/fuel mixture. It is part number five in this diagram. https://www.cheapcycleparts.com/oemp...31c/carburetor

It comes from the factory with a tab that limits how much it can be turned. It may be missing on yours. Tighten it to the point of lightly seated. Too much and the delicate tip will be bent/destroyed. Once lightly seated, turn it out 2 3/4 turns. With the engine fully warm, adjust it in or out no more than 1/4 of a turn at a time to get the optimum effect. If the tab is still on the screw, you will have to open up the carb to turn the screw more than about 3/4 of a complete circle.

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post #6 of 23 Old 11-01-2019, 04:48 PM
 
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Shock?? do you mean Choke? sorry I am confused.
also known as Enricher or Starter valve set #12 on parts page
https://www.cheapcycleparts.com/oemp...31c/carburetor
if you pulled out the cylindrical plunger there is no way engine will run properly..

image: enricher/choke nut (circled) with spring and plunger attached to cable
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post #7 of 23 Old 11-01-2019, 05:01 PM
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SK, I think you are probably right. I too was (am) a little confused.

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post #8 of 23 Old 11-01-2019, 06:40 PM
 
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It looks to me like the throttle stop adjument that is high-lighted in that picture, part #10 on the referenced diagram.

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post #9 of 23 Old 11-01-2019, 09:42 PM
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Yes, if the idle screw, #10 in diagram, is tightened down too far, that could also cause high idle.

Keepin' all the left over parts. Gonna use 'em to build another bike!

'01 & '09 Rebel 250, '06 Ninja 250, '89 VN 750
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post #10 of 23 Old 11-01-2019, 09:56 PM Thread Starter
 
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You both guys, sorry english is my second lenguage and sometimes autocorrect screws me more than it helps. Anyway yes Choke was the correct word. I do have the Choke nut and the part that goes inside, thats the part that i took out, so the carb gets lots of air now. So if i insert the metal part back again the carburetor seems to not like it too much. So Im trying to build a bobber and most of the that i see in the internet, seem to not have this cable, so question is, How can i go about that? And also i found the screw for the airflow, and mess with it ,with no good results. Thaks for the kind advice.

Edit, should i put back the cylindrical plunger, maybe with a piece of string to make it saty on top instead of the bottom?

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