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PostPosted: Wed Jan 18, 2012 10:51 pm 

Joined: Wed Jan 18, 2012 10:36 pm
Posts: 166
Ok.
After never letting me down, my S2 stranded me a couple months ago. It started breaking up and popping going up a big hill, then it was only running on one cylinder.

My better half brought the big van out and collected me and the next day I did the following....
I checked for spark at the plugs, on 2 out of 3 it was weak and thready, almost nothing really.

Cleaned the plugs (they weren't that bad, a little darker then they maybe should be, but I run premix and Im a bit heavy on the oil)

Cleaned the points, they looked ok I suppose.

It fired right the heck up after that and ran sharper than I remembered it! (it had been a while since I cleaned the plugs) I went out for a short run. Again, after a brief run @ 60 mph, it started feeling crappy again only this time I made it home. It was popping again and sputtering.

I haven't done a thing with it since that. It seems like whatever it is is worse when it gets hot, it both cases it happened during/after being hard on the engine.

Could this be a bad condenser or two? Do they act like this when they go bad?

Any ideas would be appreciated.

Neil

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1972 S2 350, 1972 F9 350 Bighorn, 1975 KX400, 1981 YZ465, 1980 XT500 (Built for MX) , 1987 KD80, 1995 MZ Skorpion, TTR 125, 1994 KDX200 , 1978 Mobylette, 1985 KX350R-F91m (Frankenstein) and a Doodle Bug


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PostPosted: Wed Jan 18, 2012 10:53 pm 
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Joined: Wed Jun 08, 2011 10:41 pm
Posts: 3489
Location: Mount Vision, NY
Coils?????????

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PostPosted: Wed Jan 18, 2012 11:20 pm 
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Joined: Tue Jun 07, 2011 6:36 am
Posts: 2695
Location: Dandridge, TN, USA
Those are symptoms of a weak battery.

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PostPosted: Thu Jan 19, 2012 1:27 am 

Joined: Thu Jun 09, 2011 8:26 am
Posts: 399
Location: Melbourne, Australia
Sounds like it may be having charging issues once warm. Or as Mraxl says a bad battery.
I'd check resistance hot and cold and see what change there is.
http://www.3cyl.com/mraxl/manuals/maint/contents.htm will have the how to.


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