Question about 1996 Triumph Daytona 1200

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Running on three cylinders, fueling up plug!

Ok I have a 1996 Triumph Daytona 1200 limited edition, had it from new.
Recently took it in for its 40,000km service & the day prior to service it started to run rough running on only three cylinders. Mentioned this to the service dealer. Picked up the bike they informed me they replaced the plugs as well as the service. Ran well for the first ride of 300km put bike away for a couple of weeks & went to start it & the same problem developed so I took the plugs out gave them a clean noting the fourth plug on the right was very wet with fuel & fouling up, there was no indicating of fuel flooding as there wasn't the smell of fuel. Took it back to bike shop where they informed me it tested as needing a new ignition coil & replaced it & cleaned the carbys & fuel filters. When I picked it up immeadiately it did the same thing so I left the bike at the shop another week where they rode it put a carbon tester up the exhaust to see if it was running rich which it wasn't they even leaned the last two carbys on the right off. I took it away for a good ride and gave it a good hard ride & about 15kms into ride it started to play up again throttle becoming hesitant when you wind it on as though one of the plugs is fouling up again. So at this stage the bike is back in the garage so any info or suggestions to what may be causing this problem would be appreciated.

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  • phil_mcgee Jun 21, 2009

    Cheers bozcro

    I may throw a new set of leads on and see if this solves the problem. I find that after I have cleaned the plugs throw them back in it rides fine for a while but if I give it a good hard run then about 10kms into the ride it is starting to play up again do you think this could be the problem with the leads hey?

  • phil_mcgee Jun 24, 2009

    Will try your advice even though after the initial problem I had the first time a new set of plugs was put in, being only 300km ago.

    Elimination will prove to be the cheapest option I am hoping.

    Thanks again! Phil



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If three cylenders are running fine and 1 not with a wet plug, something is wrong with the one cable , its connection, shorting(make sure its not to close to the engine) or the plug

Posted on Jun 21, 2009

  • bozcro
    bozcro Jun 21, 2009

    this further information makes me believe that you have a weak plug, as although it may work at low rpm, at higher rpm+heat it will break down and not work well. before you spend any money ,try switching the wet plug to another location and see if its the wet again. at least you can illiminate the plug as the problem


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I had this problem on mine although it was in the end due to my bike being left leaning on the side stand for six month and as the petrol evaporated from the carbs it left a sandy deposit in the carb nearest the side stand, this is where it get worth reading if your carbs have been off there is a tiny tiny needle on the bank of the carbs alowing the throttle cable to return its so easy to loose on refit its unbelivable it may be that having the carbs /coil has done the trick but this part has been lost during refit causing it to splutter on 3 cylinders. remove your tank look at the carbs from above whilst opening and closing the throttle you should be able to see if both returns are operating properly. its worth a try my friend

Posted on Feb 24, 2010

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Try to run it on prime my diaphram is shot on my tap runs on three on main and reservre fine on prime must get round to fixing it tony

Posted on Jun 27, 2009

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Please rate this solution. Thanks!

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