Over Run Backfire Solved - Triumph Forum: Triumph Rat Motorcycle Forums
Thunderbird Cruiser Chat Cruiser chat for the the Thunderbird twin

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post #1 of 7 (permalink) Old 08-11-2019, 11:24 AM Thread Starter
Production 125
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Over Run Backfire Solved

I was sure I saw a post on here About excessive backfire on Decel ,but can't seem to find it now. Anyway I have TOR exhaust with the TOR tune installed from the dealer. The TOR pipes where installed on the bike when I purchased it. The problem is there was a very bad back fire on deceleration. Even after having the valves adjusted which where out quite a bit.
I recently ordered the Dealertune cable and software to check throttle body balance. They where not in Balance and now that they are balanced the Overrun Back fire is Gone other than a little burble.

Just thought I would pass that on.
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post #2 of 7 (permalink) Old 08-26-2019, 08:19 PM Thread Starter
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Over run Backfire part 2

So After the Throttle Balance was complete there was still some minor overrun popping. Throttle Balance cured 90% .
TPS was out just a bit. Service Manual says .59v +- .02v
Mine was set at .68v . after that was corrected to .59 I would say 98% cured with only the odd pop. I can live with that.
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post #3 of 7 (permalink) Old 08-27-2019, 12:00 AM
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Even with the TOR tune, it's still too lean. I added 5% to the fueling map (with TuneECU) and it made a big difference in reduction of decel popping.

2013 Blue Marble Haze Thunderbird 1600 ABS
2009 Black Bonneville A1 ("Mag")
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post #4 of 7 (permalink) Old 08-27-2019, 07:30 AM
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Good idea to keep that stuff in check......unfortunately, the ECU in 14 LT's are locked
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post #5 of 7 (permalink) Old 08-28-2019, 06:54 PM
SuperStock
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Anybody can install TuneECU ? Not just the dealer ?

JJ
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post #6 of 7 (permalink) Old 09-07-2019, 09:40 AM
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Quote:
Originally Posted by Jammin'John View Post
Anybody can install TuneECU ? Not just the dealer ?

JJ
Yes, it's a free app not sanctioned by triumph made by a tech savvy guy who is not affiliated in any way with triumph. triumph used a app called dealer tool, not tuneecu. However, somewhere around i think 2015 triumph started using ECU's in all models that will lock up and become inoperable if you connect tuneecu to it. So if you want to try it be sure your bike is on the good list. Go to tuneecu.com to check. You also need a cable to use it. That info is on the site too.
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post #7 of 7 (permalink) Old 09-08-2019, 10:08 AM
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Thanks TorqueBird.
I'm pretty happy with my tune. Stock air cleaner,Cat removed,TOR tune. I think you would call it TOR tune. It's the "competition,off road tune that the dealer can do.
I get one gunshot backfire if I run her hard and turn off the throttle to coast to a slower speed. One time it goes bang.

JJ
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