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Poping, Spitting, Farting Termi

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Heya folks,

Just picked up my new MTS 1200 S Touring yesterday with the full Termi installed on delivery by the dealer. Absolutley love the bike, but I have a question - or more a concern. I was warned about the popping and cackle on decel and was expecting it having owned many Harley's with straight pipes, but this does seem a bit excessive and unpredictable. It's even backfired through the airbox a few times which gave me cause for alarm. This suggests a fueling issue to me which seems odd seeing as it comes with the race ECU and was supposed to have been tuned by the dealership.

Anyone else experience this sort of issue with the full Termi? Should this even out over the next few days as I put on more miles? Any recomedations to try and smooth this out?

Tempted to take it back to the dealership and see if they can fix it or at least take out the backfire from the airbox.

Thanks for the input!
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Frozn. There is so much on this topic here and on Multistrada.ms. Here is a summary I have posted elsewhere: (I have the full Termi too)
"Need to be careful which year MST’s we are talking about (I think).
The later ones switched to the Mitsubishi ECU and (as far as I know) apart from authorised dealers doing ‘factory’ updates to that ECU, it can only be ‘reflashed’ with a new map by very few people…and they are well reported on other threads. I wanted to go 100% ‘open-loop’ and get rid of the O2 input. CJS racing in the UK did the ECU for me (also to get rid of the warnings) and they flashed a map they had developed for the later MST’s, and in my case, with the full race Termi. Now all credit to Chris at CJS, he pointed out that his map was only likely to be a ‘base line’ as these engines all seem very different, not to mention the ‘ambient’ conditions. (UK to Malaysia, VERY different). If you take your bike to CJS then he will ‘fine tune’ his map to your bike on his dyno. Well…his ECU made a significant difference but my dyno man said there was still significant room for improvement, especially with the torque in the lover rev range, but as he could not ‘get into’ the Mitsubishi ECU, it had to be a PCV. I had that fitted, and he spent many hours doing each cylinder individually…and the improvements are VERY significant. The ‘backfire’ has gone…reduced to a nice ‘popping’, sometimes, mainly on decel in second gear, (which my dyno man says he can work on) but the biggest factor is the torque at the lower/mid revs has been significantly increased…and ‘smoothed’, and makes the bike much much better in the city, and in fact, everywhere!!"

I will add that some people have had good results with the quick and easy Fatduc solution BUT...that can only be a 'band aid'. The fatduc seems to be little more than a potential divider giving a fixed perctantage reduction in the output of the O2 sensor...so you really can't expect that to 'tune' the bike.

Get it to a good dyno man...but all the info is you MUST check each cylidner individually...so no good just stuffing the sampling pipe up the exhaust. I had very significant differences between front and rear.

It's taken me six weeks of toil, worry and money but now the bike performs MUCH better at low revs....so to all those who told me 'it's a Ducati...you have to rev it'...no sirs...you have to get it tuned right...then it's smooth at low revs, pulls from low revs and just has 'nice' popping on some decel.

I wish you luck!!! Nick
 

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Oh...I forgot to mention...many people (including me) have found the Termi system leaks. The header nuts are NOT very tight...10nm....that aint much...everyone over-tightens them. (And you can't get a Q-wrench on all of them). Mine leaked badly where the pipe goes into the box...which actually probably would not make much of a difference (compared to a leak in the header pipes). In the end my dealer used a high temp silicon....which has stopped the leak...but I will let him get the box off when I need a tyre change!
 

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Exhaust gaskets?? The only gaskets with the whole termi system are the header pipes to head...and they are not copper. What other gaskets are you referring to?
 

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Air Bleed on throttle body

Anyone can tell me more about the air bleed that was mentioned? Can't seem to find it in the workshop manual (but I never can find what I'm looking for there!). All info on what it does and how it's adjusted is welcome...though I guess you need to be monitiring the exhaust to meaningfully adjust anything.
 
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