Need Help Diagnosing
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Cruiser
Joined: Jul 2011
Posts: 185
Likes: 0
From: Greenville SC
Need Help Diagnosing
Have 1999 1200S. Been running really bad. (Backfiring while riding, low power etc.) I checked the air filter, replaced the four spark plugs and put my exhaust gaskets in. And still runs crappy. Neighbor came by and said, Feel your front cylinder". It was cold. What should I check next? Ignition coil, plug cables? (Weird thing also: when i hit the choke, the other cylinder would kick on)
Thanks
Thanks
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Cruiser
Joined: Jul 2011
Posts: 185
Likes: 0
From: Greenville SC
Hi Neighbor,
I am using wrapped 1 3/4' Drag pipes.
They have been on since March.
I thought Power Commanders were for fuel injected bikes. I have a carb.
I appreciate your time sir, as well as your service.
I am using wrapped 1 3/4' Drag pipes.
They have been on since March.
I thought Power Commanders were for fuel injected bikes. I have a carb.
I appreciate your time sir, as well as your service.
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Cruiser
Joined: May 2012
Posts: 222
Likes: 3
From: Pittsburgh
Air, fuel and spark. I'd start checking spark, it's the easiest. Pop off the plug boot, stick the tip of a screwdriver in(plastic handle) and hold the shaft of the screw driver so it's just hovering above the jug, close enough to arc. Now it would be good if you had a friend to help you with cranking it, if the coil/wire are good you should be able to see it sparking on the engine.
EDIT: just saw the comment about firing with the choke, most likely eliminates spark but still wouldn't hurt to check.
A trick we would always do was spray some starting fluid (or anything flammable) around the suspected leak area. If you get a sudden rise in RPM it's because it sucked it in and ignited it. Be careful that the engine isn't too hot.
EDIT: just saw the comment about firing with the choke, most likely eliminates spark but still wouldn't hurt to check.
A trick we would always do was spray some starting fluid (or anything flammable) around the suspected leak area. If you get a sudden rise in RPM it's because it sucked it in and ignited it. Be careful that the engine isn't too hot.
Last edited by AlexWS; Jun 12, 2012 at 08:40 AM. Reason: Oops
Thread Starter
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Cruiser
Joined: Jul 2011
Posts: 185
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From: Greenville SC
cHarley is the winner, it was the intake manifold gasket, and the bike is back to its full power.
I appreciate all the advice given by all of you.
I appreciate all the advice given by all of you.
Last edited by Raider Dana; Jun 12, 2012 at 09:47 AM.