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How does my spark plug look (pics)


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haha, would it help if I cleaned it with some carb cleaner? or should I just replace it? I also noticed the gap was way off, It was bent down really far. I gaped it at .60 mm. After fixing the gap issue it seemed to run much better and idled faster.

I believe new spark plugs like that are worth 3-7$... so just get a new one. how would you like it if the bike cut off in a race and you crashed, or lost the race? or if the bike died while you are 10 miles out in the forestry and have to walk back to the truck and/or ruin your day of riding, just because of a spark plug?

just replace it, its not worth trying to save a few bucks and having something go wrong.

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My spark plug is only 3 weeks old. But it probably looks like that because I have been running it rich until now. The bike starts on the first kick every time, but you guys think I better replace it, huh?

its hard to say, I dont know. do what you want I suppose. if it still makes a spark, put it in and run it.

but I know ive had riding days ruined due to friends spark plugs going bad, at the start, or mid ride. and it pisses me off that they tried to save 5$ in maintenance and the problem could have been avoided all together. its very cheap insurance, but if you really wanna keep using it that your decision. personally I would change it, and avoid future frustration just in case. but to each their own I guess.

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You will never be able to get a good plug chop with a plug that is dirty to begin with before you start rejeting. Stick a new plug in and ride it around. Then take some pics and post them up. At first I thought the pics were a joke untill you said the plug is only 3 weeks old.

Question? What did you do to make the bike run rich all of a sudden?

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I replaced the plug. The bike was running rich when I got it about 3 weeks ago. I've slowly been lowing the main jet to get the bike running leaner (and meaner ๐Ÿ‘ I think I've found the sweet spot. I'll post pictures of the new plug tomorrow after I take it for a spin.

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If you aren't going to replace it, at least run a wire brush over to clean it off a little bit.

My thoughts exactly.

That plug looks like the fuel mix is rich but not terribly so. If you are trying to get a good plug read, you really should start with a new, properly-gapped and torqued plug. Then ride the crap out of it, varying from putting around to WOT runs. Then let the motor cool and check the plug. If changing the main jet does not yield the desired result, you might try messing with the slow jet and air/fuel screw, and/or the needle jet clip position too. Just do one slight adjustment at a time and see how it responds, that way you can easily go back to the previous tune if it responds poorly. This is how I tune my bikes (along with the advice on these forums) and it takes a while but the result is always perfection. I assume we are talking about a thumper not a smoker..?

One of my bikes has the same plug that it had 5 years ago and I ride it all the time, starts first kick consistently. I'm sure the plug is dirty and the bike would run a little better with a new one, but I check it and clean it at least once a year and it's never fouled, just kind of crusty. I am just a weekend warrior so that 1/2 extra hp does not matter so much.

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Here's the nice tan color we're shooting for:

plug.jpg

My thoughts exactly.

That plug looks like the fuel mix is rich but not terribly so. If you are trying to get a good plug read, you really should start with a new, properly-gapped and torqued plug. Then ride the crap out of it, varying from putting around to WOT runs. Then let the motor cool and check the plug. If changing the main jet does not yield the desired result, you might try messing with the slow jet and air/fuel screw, and/or the needle jet clip position too. Just do one slight adjustment at a time and see how it responds, that way you can easily go back to the previous tune if it responds poorly. This is how I tune my bikes (along with the advice on these forums) and it takes a while but the result is always perfection. I assume we are talking about a thumper not a smoker..?

One of my bikes has the same plug that it had 5 years ago and I ride it all the time, starts first kick consistently. I'm sure the plug is dirty and the bike would run a little better with a new one, but I check it and clean it at least once a year and it's never fouled, just kind of crusty. I am just a weekend warrior so that 1/2 extra hp does not matter so much.

In one of Eric Gorr's books it says not to run a plug for more than 20 hours and that it's not good for your ignition or something along those lines.

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Its actually a 2 stroke but most of your advice will work with my smoker to, thanks. Will a badly gapped plug make the bike run terrible? How important is it to have the right gap?

just curious, what makes you think he was talking about a 4 stroke?

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just curious, what makes you think he was talking about a 4 stroke?

That plug looks like the fuel mix is rich but not terribly so. If you are trying to get a good plug read, you really should start with a new, properly-gapped and torqued plug. Then ride the crap out of it, varying from putting around to WOT runs. Then let the motor cool and check the plug. If changing the main jet does not yield the desired result, you might try messing with the slow jet and air/fuel screw, and/or the needle jet clip position too. Just do one slight adjustment at a time and see how it responds, that way you can easily go back to the previous tune if it responds poorly. This is how I tune my bikes (along with the advice on these forums) and it takes a while but the result is always perfection. I assume we are talking about a thumper not a smoker..?

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That plug looks like the fuel mix is rich but not terribly so. If you are trying to get a good plug read, you really should start with a new, properly-gapped and torqued plug. Then ride the crap out of it, varying from putting around to WOT runs. Then let the motor cool and check the plug. If changing the main jet does not yield the desired result, you might try messing with the slow jet and air/fuel screw, and/or the needle jet clip position too. Just do one slight adjustment at a time and see how it responds, that way you can easily go back to the previous tune if it responds poorly. This is how I tune my bikes (along with the advice on these forums) and it takes a while but the result is always perfection. I assume we are talking about a thumper not a smoker..?

lol oh, my bad, I missed that part. ๐Ÿ‘

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My question is how much are you letting the bike idle? and yes you are looking for a tan color. just keep in mind that if you change the pilot, it affects everything above, so needle and main. But if you are positive that its just the top end thats flat, it would seem you are on the right track. Keep us updated! ๐Ÿ‘

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Why did no one mention even the possibility of him using that spark plug, but bringing a new one with him in case that one fouls out? I would've thought at least SOMEONE would've brought up that option ๐Ÿ‘

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Here's the new pics. I"ve ran the bike for about 45 minutes or so. The idle is much faster then it used to be after I put in a new plug and gapped it properly, also lowered the main jet. The air/fuel screw doesn't seem to really effect the idle speed at all, what wrong? Before, if I turned the idle screw to about 1 turn out the bike would die. Now the bike idles so fast that I can damn near close the air/fuel screw and it still idles fast. does that mean its running to lean?

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