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Post by florida on Jun 19, 2015 9:11:02 GMT -5
Ok, bikes been running fine but last night it just died on me.
I thought it was outta gas so i put gas in it. Still wouldnt start.
I cleaned the spark plug 75 miles ago. It was sooty and oily. Theres a bad exhuast leak due to broken exhaust stud. The battery is fully charged and the engine will turn over.
My question is: where do i start?
I really appreciate when knowledgable people help out riders.
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Post by tvnacman on Jun 19, 2015 9:21:53 GMT -5
do you have spark, when was the last valve adjustment?
John
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Post by florida on Jun 19, 2015 10:06:08 GMT -5
Valves were one month ago.
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Post by florida on Jun 19, 2015 10:18:36 GMT -5
Plug was fouled very black with soot on the part thats not in the hole. Weird.
Why is it all black? Cleaned it last week.
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Post by tvnacman on Jun 19, 2015 10:23:51 GMT -5
check for spark, maybe a new spark plug, I don't believe in cleaning them. Recheck the valve lash. Fix the broken exhaust stud .
John
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Post by toddmaples on Jun 19, 2015 10:32:37 GMT -5
check for spark, maybe a new spark plug, I don't believe in cleaning them. Recheck the valve lash. Fix the broken exhaust stud . John I really wish the manufacturers put steel threaded inserts in certain places on these bikes like the exhaust bolt holes and the chainguide bolts holes on the crankcase. Cant count how many times ive seen these holes stripped and cause issues. |
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Post by florida on Jun 19, 2015 10:39:32 GMT -5
Cleaned plug and gapped it. Started up and idle was high due to water and alc on plug.
I didnt put never seize on the plug last time i installed it.
Im going to this time. Finger tight last time also.
How do i post pictures from iphone5?
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Freshman Rider
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Post by hunter on Jun 19, 2015 17:08:44 GMT -5
Finger tight doesn't seal and could be causing the soot on the outside that you're referring to. If the plug isn't tight then exhaust will leak out around it meaning lost power. Not saying to lock it down with all your might, but a snugging will do just fine.
The exhaust leak could lead to problems with the valves so a month ago may not mean anything depending on how bad the leak is. Doesn't cost anything to check em again.
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Post by geh3333 on Jun 19, 2015 17:41:42 GMT -5
Plug was fouled very black with soot on the part thats not in the hole. Weird. Why is it all black? Cleaned it last week. Wait a minute , your plug was fouled and you just cleaned and gapped it ? Toss the plug and buy a new one . you really need to fix the broken exhaust stud , and if the plug was oily ,you have other issues. You have oil reaching the plug , and you need to find were its coming from . you could have a bad head gasket or the rings could be leaking oil . possibly even a bad valve seal. |
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Post by tvnacman on Jun 19, 2015 18:06:26 GMT -5
Finger tight doesn't seal and could be causing the soot on the outside that you're referring to. If the plug isn't tight then exhaust will leak out around it meaning lost power. Not saying to lock it down with all your might, but a snugging will do just fine. The exhaust leak could lead to problems with the valves so a month ago may not mean anything depending on how bad the leak is. Doesn't cost anything to check em again. Spark plugs have crush washers, once you tighten it the crush washer is crushed and may not be able to be used again. John |
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Post by florida on Jun 19, 2015 21:26:17 GMT -5
Thx for all the help.
Im checking my oil tonite.
I should be getting a bbk and a9 cam, uni filter and starter in a week . Be my first build.
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Post by lain on Jun 20, 2015 15:24:59 GMT -5
Plug was fouled very black with soot on the part thats not in the hole. Weird. Why is it all black? Cleaned it last week. You didn't tighten it enough. Once you get to as tight as you can by hand, use your wrench to tighten it a quarter turn more. |
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Post by florida on Jun 20, 2015 18:12:00 GMT -5
My scooter was losing power today while running after yesterday cleaning the spark plug. I checked the plug today and it was fouled. I had only ridden it about 7 miles. The valves are noticebly loud also.  The plug isnt hidden in a shadow. Its sooty black. Kinda oily too. The pic below is from when i pulled it yesterday.  |
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Post by pistonguy on Jun 20, 2015 19:31:51 GMT -5
Thx for all the help. Im checking my oil tonite. I should be getting a bbk and a9 cam, uni filter and starter in a week . Be my first build. I Strongly Encourage you to get a book and do some Reading on Basic Fundamentals of this Build. Do this before you listen to Hear say, Old Tales and Learn Bad Habbitt's It will pay off big in the long run. BIG! Follow the Five P's Prior Planning Prevents Poor Performance. Good Luck! |
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Post by tvnacman on Jun 21, 2015 13:20:07 GMT -5
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