V85TT E5+ Decat

[JHBettsSr]

Have any of you folks done a Decat on your '24-up E5+ V85's? I'm looking at Mistral or QD for options. If you have any experience or recommendations, please share. Thanks very much.

[Vagrant]

I used the cheap 19-23 Chinese one on my 25. It works fine but the 25 stock muffler goes on the outside of it instead of the inside. Best to use an earlier one but you don’t have to. I posted pics a while back here or on ADVRider.

[JHBettsSr]

I bit the bullet and ordered the E5+ (no-cat) system from Mistral in Italy. Hopefully those loafer wearing, chain smoking, guys at Mistral will put down their coffee long enough to ship it soon :-).   

[PeteS]

Yike$!! I m glad I got mine when I did. I got the version with the cat as I wasn’t sure if the non cat would change the tune that much. Its in the pipe and not even noticable. Did you also get the V twin boost? If not how do you plan to retune if its changed for the worse?

Pete

[JHBettsSr]

Yike$!! I m glad I got mine when I did. I got the version with the cat as I wasn’t sure if the non cat would change the tune that much. Its in the pipe and not even noticable. Did you also get the V twin boost? If not how do you plan to retune if its changed for the worse?

Pete

I didn't want the Mistral version with a cat, my plan was to eliminate the cat, use the stock muffler, decrease weight and heat, and get a deeper exhaust tone. I also decatted my '17 Triumph Bonneville T120 the same way and couldn't be happier. I don't plan to retune the V85TT, there are no sensors in or after the cat so the ECU can adapt if it wants/needs to.

[PeteS]

Keep us posted on the results. I replaced the muffler with a Leo Vince just the hear the motor but it saves even more weight too. The cat version just adds wire mesh across the bore at the exit. Probably only accounts for a few ounces vs the non cat version and easily removed.

Pete

[JHBettsSr]

Keep us posted on the results. I replaced the muffler with a Leo Vince just the hear the motor but it saves even more weight too. The cat version just adds wire mesh across the bore at the exit. Probably only accounts for a few ounces vs the non cat version and easily removed.

Pete

Will do, PeteS.

[dave1068]

Small word-bigger bike: I just posted a similar thread on the new Stelvios. Im thinking about de-cating it to lose some heat that it throws, a few lbs and maybe a little better acceleration.

Do you know if just removing the cat and adding the new pipes but keeping everything else stock  (ECU and tailpipe) has any other improvements?

[JHBettsSr]

Small word-bigger bike: I just posted a similar thread on the new Stelvios. Im thinking about de-cating it to lose some heat that it throws, a few lbs and maybe a little better acceleration.

Do you know if just removing the cat and adding the new pipes but keeping everything else stock  (ECU and tailpipe) has any other improvements?

I can't advise you about your Stelvio and I haven't decatted my '25 V85TT yet (parts are on order). I can tell you that I did decat my '17 Triumph Bonneville T120, kept the stock mufflers, and did not retune anything. The result is much less weight, much less heat coming from where the cat was, and a nice deep, but not loud, exhaust tone. The Triumph may be faster now, it sounds faster anyway, but that's subjective as I did not measure the performance before or after. I'm hoping to get similar results from decatting the V85TT.

[PeteS]

Small word-bigger bike: I just posted a similar thread on the new Stelvios. Im thinking about de-cating it to lose some heat that it throws, a few lbs and maybe a little better acceleration.

Do you know if just removing the cat and adding the new pipes but keeping everything else stock  (ECU and tailpipe) has any other improvements?

Check out the Mistral website. They have dyno charts showing before and after installing their exhausts. Gains are minimal, maybe 3-4 hp at best.

Pete

[ridingron]

I didn't want the Mistral version with a cat, my plan was to eliminate the cat, use the stock muffler, decrease weight and heat, and get a deeper exhaust tone. I also decatted my '17 Triumph Bonneville T120 the same way and couldn't be happier. I don't plan to retune the V85TT, there are no sensors in or after the cat so the ECU can adapt if it wants/needs to.

I have a '23 Euro 5 version. The muffler looks similar if not the same as the 5+ and weighs about a ton and a half by itself.     I doubt you'll lose much weight staying with the stock muffler.

[JHBettsSr]

I have a '23 Euro 5 version. The muffler looks similar if not the same as the 5+ and weighs about a ton and a half by itself.     I doubt you'll lose much weight staying with the stock muffler.

That's a good point. I'm aware that eliminating the cat will only cut a few pounds of weight. It's mainly heat from the cat (directly under the oil sump) that I want to be rid of. A deeper exhaust note and easier access to the oil and gearbox drains will be added benefits as well. I'm pretty happy with the weight of the V85TT as is, it's tons lighter than my BMW K1600GT and about the same as my Triumph Bonneville T120.

[Littlefield]

And, of course, the O2 sensor only works for you in closed loop mode.

[PeteS]

And, of course, the O2 sensor only works for you in closed loop mode.

The E5+ V85s don’t have a sensor after the cat, only before.

Pete