Triumphrat

Mark62

I let her warm up long enough to have a smoke. The whole time decreasing the amount of choke. She coughs the entire time to work (15miles). I am going to throw a coil at here tomorrow.
Mark

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normansprint

Mark,

Back again second time but is it carb icing. Poor when its cold ok when its warmer. Try 1% Silkolene Pro FST or ethanol in the gas bet it stops coughing. Quite a few posts on the other forums about this.

Less likely with a Trophy than an unfaired bike but may just happen

Cheers

Mark62

I considered carb icing, but... This morning I was going to ride to work, but she was hard to start and ran very poorly from 1000-2000 rpm. After 2k ran fine. I took off my gear and drove my truck. I am going to recheck things tonight.
Mark

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Trophynorway

Is she firing on all 4 cylinders when she is cold? if not, you have at least narrowed the search to that specific cylinder. Try to spray some water on the exhaust when she is cold, and see if it evaporates on all 4. Even if she is cold, and you use choke, all 4 cylinders should fire.
If there is one or more cylinders that does`nt fire, try to switch the coils, and see if the problem goes to another cylinder. If so, there is a big chance that it could be one coil thats bad. If not, it might be carb or plug. My 900 coughed like that, it started with some mild coughing, but became worse after some time.

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cornishgolfer1

If I see the weather man show anything like a 30 or 40 on the chart...........I stay in bed. Take my baby out for a ride. ***** that.

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Mark62

I borrowed a lazer thermometer from work and shot my exhaust pipes by the radiator. My #3 cylinder is 200 degreees higher than the others! I disconnected the vacuum line to the peatcock and the line is wet inside. I turned my petcock to PRI and the temp dropped to the same temp as the other cylinders. If the petcock is in ON when I am riding she coughs, but if it is in PRI she runs great. So I feel very stongly that the petcock is leaking and the fuel is being sucked into #3 carb, which makes it run rich and cough.

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bobh

Mine ran rough between 1000 & 3000 rpm. the cause was the 80 watt bulbs i had fitted combined with the heated grips, were robbing power from the coils and the alternator couldn't put power back into the battery quick enough, I turned the tick over up to 1000 rpm and i runs fine now. my bike also had a new battery at the time. Might be worth checking the voltage being delivered to the coils .

Bob

Mark62

Pulled tank sat. and checked petcock. Vacuum line was wet from fuel. Petcock would not hold a vacuum. Took valve apart and fuel was present on "dry" side. Ordered new diaphram for $35, won't arrive until thurs or fri....
Mark

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Trophynorway

Did the new diaphragm solve the problem?

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Mark62

I have not had the chance to ride since the repair...snow, very cold and I had the flu. But it would cough when I reved her on the center stand and now she runs clean. I hope the weather breaks so I can ride.
Mark

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We can put a man on the moon, but concrete and asphalt cannot be made to meet evenly.