Question about 1995 Honda VT 1100 C Shadow Spirit

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Bike not firing properly, plugs fouled

Honda 1987 VT 1100 C Shadow. Bike is not firing properly.Backfires. Does not accelerate as normal, drove bike up to 2nd gear, engine is ''lugging''. Compression sounds abnormal.
Removed spark plug and electrode/tip is sooty black. Also found sooty black greasy stuff along the spark plugs threads....
Was fine before winter only started up occassionally during winter (Perhaps is this from gunning the engine during winter?.Please, got any ideas?
Thank you.

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  • sheldy338 May 20, 2009

    Will do! Thank you to all replies!!!

  • Gino Cussen
    Gino Cussen May 11, 2010

    Could be dirty fuel. Try draining all the fuel from tank and carbs and top up with fresh fuel.

  • Anonymous Mar 19, 2014

    getting a black spark plug frequently in my bike


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If you used the choke to start the bike last winter, you probably fouled the plugs. Depending on the age of the plugs, you can either clean and re-gap them or replace them with new, which also have to be checked for gap.
Secondly, if you did not run the bike out of fuel after starting it, chances are you have some build up in the carb jets. New, clean fuel and Techron or Seafoam gas treatment will help if it's not too bad. Follow directions on the can. I personally used Seafoam but Techron is recommended by Honda. Be sure to mix per instructions, which on Seafoam is 1 oz. per gal.

Posted on May 20, 2009

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