V85TT aftermarket exhaust

[evank]

I am a first time Moto Guzzi owner, having just purchased a new 2021 V85TT.  Having previously been a long time owner of a carbureted, analog Kawi KLR 650, my guzzi is pretty luxe.
I would like to replace the exhaust system to delete the Cat.  I like the one made by Guzzitech but am not sure it will work.  The '21 is Euro5 compliant and has sensors (Lambda?) on the
headers just as they leave the head.  Has anyone done this mod?  If so, are there any complications with the engine management system, or any other issues to be aware of?  Thanks.

[blu guzz]

welcome aboard.  on my 2020 version, i put in a cat eliminator or Y pipe and left the standard pipe.  it is just a little louder, runs even better, much cooler and did not need any adjustments.  i can't speak for the 2021. 

[Huzo]

I made my own set on a mandrel bender and put the sensors behind the sump drain.




Seems to work just fine..

[Vagrant]

It sounds like the pipe diameter on the 21 is bigger. As far as I know there isn't a replacement yet. You might as well figure a mapping fix in on the deal.

[skippy]

I certainly understand the desire to eliminate the CAT but I assure you that the need to do so on the 2021 model isn't there as it was on the 2019/2020 models. The previous model suffered from ridiculous amounts of heat eliminating off the giant collector/CAT under the transmission where as all reports from those of us who have sampled both model find that the 2021 models simply don't produce the heat. This is a good example of Moto Guzzi listening to the customer feedback and making changes. However, as you already pointed out, the new model is Euro 5 compliant and as such does have a bit of difference in the exhaust. I think your best bet is to pursue the offering from Mistral, https://www.mistralspecialparts.it/en/product/conical-exhaust-v85tt/ and see if this satisfies your needs.

Skippy

[dxhall]

I also would like to eliminate the catalytic converter, but I’m concerned that shlepping in a Y-pipe without remapping would cause the motor to run too lean.  Has anyone tried the Y-pipe with no other mods?

[evank]

Thanks to all.  I will check out Mistral and if that does not work, I will stay with the original stock exhaust system.  the '21 will not accept just a Y-pipe replacement as the headers are now welded the the CAT section rather than clamped.

[jwinwi]

Welcome to Guzziland!
Check this out... https://www.mgcycle.com/index.php?main_page=product_info&cPath=26_336&products_id=5904
Says it's in stock.

[egschade]

What's your reason for deleting the CAT? I've read that the 2021 bikes don't run as hot as the earlier years. Maybe ride it stock for a while to see if you really need to drop a grand on an exhaust upgrade.

[evank]

My thinking about removing the CAT was to free up the exhaust for more performance, remove the unaesthetic CAT box, and have a cleaner simpler exhaust system.  You are correct that
the logical thing to do is keep it stock for now and see how it goes so that is what I will do.  So far it is fine and I have not noticed much heat radiating from the system even though it has been
warm here (90s).

[egschade]

Do some research on the 2021 and find out if you actually do get any power gains. From what I recall reading it's a very minimal power improvement though it will sound better. My experience with several systems was that the only gain is at the very top end of the rev range and in some cases less power at low and mid range. What I like about the V85 is how and where it makes power, not how much.

Also, not sure how the Euro 5 tuned ECU will react to a new exhaust.

Look around this site and also check out advrider.com.