Question about 2003 Triumph Speedmaster

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Same problem Misfiring 2003 speedmaster. only at low revs, once given a handful of throttle it's fine. Makes it dangerous and difficult to ride around town. 

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Pilot jet blocked, remove air filter and blow wd40 through pilot air hole (5mm hole at bottom of venturie) or dismantle and clean.

Posted on Aug 31, 2009

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Posted on Jan 02, 2017

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2001 1100 shadow spirit how low is the rev limiter


rev limit is set at around 4000 rpm

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Right piston fails to fire occasionally and always fixes itself, mostly on cold starts, although has occurred during a ride...after a few moments of warm up...or after one or two kilometers. Difficult to...


It could be caused by a faulty coil, HT lead, Plug cap or Spark Plug. It may even be low on compression.
Check the plug gaps first. 25thou is recomemded.

Jan 16, 2011 | 2003 Triumph Speedmaster

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Revs dont drop


the thottle slide can be sticking, a rich mizture gives similar symtoms

Jul 05, 2010 | 1993 Harley Davidson FLSTF Fat boy

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Revs stuck 2000 , once passed that drives fine otherwise kangaroo jumps. its a alfa romeo 156 twin


Could be your throttle body. Check for any parts that may restrict your throttle body causing it to stick when giving it gas or letting off. Check that there is nothing blocking your throttle cable by tracing it by hand and inspecting around it.

Mar 11, 2010 | 2000 Alfa Romeo 156

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Have an 08 Triumph Speedmaster Efi model. Put K&N filter,triumph cone mufflers, power commander (PCIII) on and having trouble @ low speed around town, won't idle when cold and backfiring when...


the fuel is lean on the bottom, i dont know if the power commander can add some fuel or not. Why disconnect air injection, also if disconnected is the exhaust leaking.

Dec 31, 2009 | 2008 Triumph Speedmaster

1 Answer

Gilera Runner very difficult to start cold,then cuts out when hot


to check the electric choke..take it/off out of carb & unplug it. then get 2 short lenghts of wires, strip both ends...shove one end into the choke plug teminals(one in each hole) .then put one of the striped ends of thewires on a charged battery(one on the positve & one on the negitvie terminals) .keep them on for about 5 mins & you should see the choke head extend (you could always mesure it befor you put to battery & check in 5mis to see if extened!!) this will tell you if its working!!...if its not working this will explane why you have trouble starting from cold!!..it also sounds like the main jet is blocked...this is found by taking of the float bowl (as you may know!)it will prob be the small hole up the middle of the jet that is made up with muck!!...try sticking a strand of a wire brush up/threw it...also it sounds like the exhaust is leaking round the maifold..will have to take exhaust of & check if it need a new gasket..or resealing!!(does the exhaust blow?. this is good way to tell if it is leaking(put a rag/palm of hand over end of exhaust & you should beable to hear it blowing. ...hope this helps....Howard

Dec 14, 2009 | 2005 Gilera Runner VX 125

3 Answers

I have a 2003 kx250 i run it with mc1 50:1 and when i ride it slow around my campsite it will foul a plug and when im out in the trails getting on it hard it will run hard what sould i do so i dont foul...


I would stay with the same heat range(BR8) to stay on the safe side. You didn't say if when you are at the camp sight the bike is cold and just off the truck or warm and right off the trail. But usually alot of 2strokes need to be cleaned out when their being warmed up or they can foul a plug. Get it started, blip the throttle a few times to get some heat in the cylinder and then hold it open until you hear it rev faster and run smooth. Thats usually enough.

Jun 19, 2009 | 2003 kawasaki KX 250

2 Answers

2003 chevy calalier ls coup 2.2 engine and LEMON YELLOW!!!


ok have a transmission check down ur fuild might be a little low

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