ready to pull my hair out! Carbs, Ignition???? - Triumph Forum: Triumph Rat Motorcycle Forums
Trophy Trophy 3 & 4 - for all 900 and 1200cc models 1991- 2004

 
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post #1 of 4 (permalink) Old 06-20-2014, 01:13 PM Thread Starter
Minitwins
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ready to pull my hair out! Carbs, Ignition????

I have a 2001 Trophy 1200. The bike is making a popping noise thats coming from the carb and exhaust. Also when you start the bike from cold with choke on it idles low at first then idles high. Almost like all the cylinders start to fire at once. When you drive the bike acceleration is poor like its not getting enough gas, but revs fine at idle. I have cleaned these carbs a number times thinking i may have missed something and have synced them too. The vacuum lines and caps are fine too. Could this problem be the ignition coils? I'm ready to run it off a cliff.
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post #2 of 4 (permalink) Old 06-23-2014, 10:52 AM
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It sounds as if you have an air leak and it is running lean. Have you replaced the carb to head rubber intakes. They are 13 years old.
Strange that it is popping from the exhaust also. How many miles since its last valve clearance check. This carb site is helpful.
http://www.factorypro.com/tech_tunin...m_engines.html
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post #3 of 4 (permalink) Old 04-19-2017, 06:03 PM
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Hi. I had a similar problem with my 1993 1200/4 after cleaning the carbs. When I took it out for a test ride it was doing the same thing. In my haste to get it back on the road, I had only re-fitted the airbox back onto the carbs. I had left off the air chambers and nozzles that attach to either side. I didn't think it would matter. It did! As soon as I re-attached them it ran fine. Not sure if this is relevant to you, but might give you something else to consider. Good luck
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post #4 of 4 (permalink) Old 04-20-2017, 05:39 PM
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Quote:
Originally Posted by elsabella View Post
I have a 2001 Trophy 1200. The bike is making a popping noise thats coming from the carb and exhaust. Also when you start the bike from cold with choke on it idles low at first then idles high. Almost like all the cylinders start to fire at once. When you drive the bike acceleration is poor like its not getting enough gas, but revs fine at idle. I have cleaned these carbs a number times thinking i may have missed something and have synced them too. The vacuum lines and caps are fine too. Could this problem be the ignition coils? I'm ready to run it off a cliff.
When mine did this it was the coils, which I replaced with new Nology coils - plug 'n play, problem fixed. If you have the original coils, this might well be your problem.
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