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/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> Smokin' /cgi-bin/YaBB.pl?num=1428332245 Message started by Bubba on 04/06/15 at 07:57:25 |
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Title: Smokin' Post by Bubba on 04/06/15 at 07:57:25 This morning I fired up the bike with the choke on...lot's of white smoke appeared at the exhaust...choke was only on for maybe 10 seconds...the bike warmed up, the smoking stopped and I headed to work. The smoke was only there for maybe 20 seconds but it's the first time I can remember it ever smoking like that. The previous day I had filled up with gas. That was the only thing that was different. Should I be concerned? |
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Title: Re: Smokin' Post by Art Webb on 04/06/15 at 08:23:12 sounds like condensation in the exhaust to me, if so not a problem |
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Title: Re: Smokin' Post by Serowbot on 04/06/15 at 08:23:44 +1... ;)... |
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Title: Re: Smokin' Post by Bubba on 04/06/15 at 08:34:06 Thx! I've been playin' with the 2-strokes so it was a little un-nerving to see it on my 4-stroker... |
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Title: Re: Smokin' Post by Art Webb on 04/06/15 at 08:38:38 I actually saw a 2 stroke touring bike once, really wated that bad boy, some obscure European brand, don't recall whitch |
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Title: Re: Smokin' Post by Dave on 04/06/15 at 08:51:39 3B282E2D3F38385A0 wrote:
Jawa? The white smoke is generally condensation, and when the exhaust system and engine are cold it is common....and outdoor temperature and humidity have an affect on the issue. Too much fuel tends to make black smoke, oil tends to make blue smoke. |
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Title: Re: Smokin' Post by Bubba on 04/07/15 at 06:51:15 Okay, now I'm paranoid... This morning the same thing happened...now I'm wondering if the smoke has more of a blue tint to it... If so, I'm thinking the rings may need replacement? Curious, because it just started out of the blue (no pun intended). Compression test in order? But I have no baseline to compare to since I've never checked compression on this bike. |
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Title: Re: Smokin' Post by Dave on 04/07/15 at 06:57:18 Hold a hand mirror behind the bike...in the smoke so that the smoke runs across the mirror. Water vapor will make water droplets on the mirror and they will evaporate and leave very little behind. Oil will leave a greasy film behind.... If your bike isn't burning oil....I wouldn't worry too much about a rebuild as it is a lot of work....and riding weather is here. No reason to tear a bike apart just because it smokes a bit when you start it. |
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Title: Re: Smokin' Post by Bubba on 04/07/15 at 07:05:57 will do...thanks! |
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Title: Re: Smokin' Post by Dave on 04/07/15 at 07:21:10 Another thing to try, and this should be easy to do in Colorado. Under extended period of coasting and high engine vacuum, bad rings or valve seals will allow oil to flow into the engine. So when you coast down a long hill and then apply throttle at the bottom of the hill.....watch to see if the engine smokes for a few seconds as the oil is burned away. If this doesn't happen...the rings and valve seals are probably OK. |
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Title: Re: Smokin' Post by Serowbot on 04/07/15 at 07:50:44 You might see black specks on the mirror... thaty ain't oil, they be carbon from the muffler guts... ;)... |
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Title: Re: Smokin' Post by Art Webb on 04/07/15 at 17:18:36 79424F5849455E58434B46592A0 wrote:
Jawa? The white smoke is generally condensation, and when the exhaust system and engine are cold it is common....and outdoor temperature and humidity have an affect on the issue. Too much fuel tends to make black smoke, oil tends to make blue smoke. [/quote] I'm not sure, but I don't think so, there's a tickle at the back of my brain saying two letter name (like BMW is a three letter name) but I could be wrong I think it was German or at least a German / dutch speaking country this was in the early 80s, and it was already an 'old' bike, no longer in production |
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Title: Re: Smokin' Post by Dave on 04/07/15 at 18:23:59 7A696F6C7E79791B0 wrote:
Jawa? The white smoke is generally condensation, and when the exhaust system and engine are cold it is common....and outdoor temperature and humidity have an affect on the issue. Too much fuel tends to make black smoke, oil tends to make blue smoke. [/quote] I'm not sure, but I don't think so, there's a tickle at the back of my brain saying two letter name (like BMW is a three letter name) but I could be wrong I think it was German or at least a German / dutch speaking country this was in the early 80s, and it was already an 'old' bike, no longer in production[/quote] MZ? |
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Title: Re: Smokin' Post by Art Webb on 04/07/15 at 18:25:44 That rings a bell A distant rusty one, but definitely rings a bell |
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Title: Re: Smokin' Post by Serowbot on 04/07/15 at 18:55:10 CZ?... :-/... |
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Title: Re: Smokin' Post by Art Webb on 04/07/15 at 21:25:18 2E382F322A3F32295D0 wrote:
CZ is Czech, no? Keep in mind this was a standard / touring style motorcycle, 70s vintage darn I wish i could remember the make |
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