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Author [ES] [PL] [PT] [IT] [DE] [FR] [NL] [DK] [SE] [FI] [NO] Topic: trophy running problem 2002 model  (Read 3275 times)

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Offline vince1861

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trophy running problem 2002 model
« on: December 19, 2013, 09:07:34 PM »
Hi guys just wondered if any 1 can shed any light on my problem..
the bike ran perfect but i went to start it 1 day and it rode as if it was on 3 cylinders and then just felt like it ran out of fuel...
recovered it home where i changed the plugs  and started  it  again but again splutters,
i then give up and put her in the bike shop where had the carb sonic cleaned valve clearance done and still no 4 plug is sooting up.
in the end i give up so took the bike out,,
if u ride it slowly through the revs it will pull fine and rides fine but if u open throttle up if just splutters then clears after 4k
its a 2002 triumph throphy

Offline w8d4it

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Re: trophy running problem 2002 model
« Reply #1 on: December 20, 2013, 03:35:05 AM »
Did you check the spark plug  wire itself on cylinder 4? 
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Offline Coconut

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Re: trophy running problem 2002 model
« Reply #2 on: December 20, 2013, 09:01:46 AM »
Hi Vince,

Sorry to hear you're having problems.

You may have realised that this forum is primarily for the "new" Triumph Trophy
released in 2012 ( and which runs very nicely on 3 cyclinders ! :002: ).

Other Triumph models can ( and should ) be discussed within the "On Two Wheels - Bikers Chat" section
of the Forums, to save any confusion with the current model.

There is a forum dedicated to the previous Trophy 3 & 4 models here : Triumph Trophy 3 & 4 forum
so you may find more answers and help over there  :028:

From memory, there were problems on those models with the fuel tap clogging up,
which may be the cause of your problem if it is restricting the fuel flow ?

Cheers and good luck with it ....


« Last Edit: December 27, 2013, 09:33:09 AM by Coconut »

Offline w8d4it

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Re: trophy running problem 2002 model
« Reply #3 on: December 20, 2013, 02:10:57 PM »
The way I read the original post only one cylinder is affected.  If there were a fuel flow problem wouldn't it affect all cylinders?  If I misread the original post and it does affect all cylinders then I agree it could be fuel starvation problem.
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Offline Coconut

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Re: trophy running problem 2002 model
« Reply #4 on: December 20, 2013, 02:53:38 PM »
Good point, but I was thinking ...

it rode as if it was on 3 cylinders and then just felt like it ran out of fuel...
... although the message then goes on to say that No.4 plug is sooting up.

I wonder if low fuel / fuel starvation affects one plug more than another ? ....
but then if it's sooting up, that's not indicative of fuel starvation,
more likely running too rich, or maybe there's a fault with that plug
or the HT lead etc stopping it from sparking correctly ?

« Last Edit: December 27, 2013, 09:29:31 AM by Coconut »

Offline w8d4it

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Re: trophy running problem 2002 model
« Reply #5 on: December 20, 2013, 03:29:26 PM »
*Originally Posted by Coconut [+]
Good point, but I was thinking ...
... although the message then goes on to say that No.4 plug is sooting up.

 maybe there's a fault with that plu
or the HT lead etc stopping it from sparking correctly ?


That is my point.  He said he changed the plugs so not likely the plug itself.  If the new plug is sooting up then it isn't sparking correctly.  If the plugs were changed the odds of getting two bad plugs in the same cylinder are astronomical.  So logically the only constants are the plug wire or coil.  If each cylinder has a dedicated coil I start there but if the cylinders share  a coil I'd start with plug wire.  I don't know that particular bike so I can only make a general observation.
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Offline Glenn

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Re: trophy running problem 2002 model
« Reply #6 on: December 20, 2013, 04:53:15 PM »
Hi Vince,
3 areas to check:
spark
Fuel
Aspiration (air in and out).

Spark:
Are the correct plugs fitted to all cyl's? (visual check)
Are the plug gaps correct? (physical check)
Is each cyl firing? (start up and use insulated pliers to pull each plug lead off one at a time. if one makes no difference to engine speed or noise when it is off, that cyl circuit is faulty).
If all works ok until the engine gets hot, something in #4 circuit is faulty. Change the lead first as its the cheapest option.

Fuel
Is it only #4 cyl sooting up? (If yes, then it's not something that is common to all 4 cylinders i.e. not the fuel tap or filter).
Does it have a single or twin carb arrangement? (if yes, it's not a fuel issue).
Does it have one carb per cylinder? (If yes, that could be the source). Overfueling causing incomplete burn, hence soot. Needs carb service.

Aspiration
Does it have one air filter? (If yes, that's not the cause).
Does it have an air filter per cyl? (If yes, that could be the cause).

If all the above is ok, it could be a sticking exhaust valve preventing the cyl from breathing out properly.

I hope this helps. Good luck.
« Last Edit: December 20, 2013, 04:59:51 PM by Glenn »

Offline w8d4it

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Re: trophy running problem 2002 model
« Reply #7 on: December 20, 2013, 04:56:14 PM »
I'm betting on the electrics to that cylinder.
Proudly Riding Triumph Since 1968
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