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GTM V85TT Exhaust NOW WITH DYNO RUN

Breva-Al

Just got it firing!
Joined
Aug 9, 2016
Messages
15
Location
Coventry, UK
Hi Todd,
Hope you are keeping safe and well.
Are you carrying on with the full exhaust system now you have sold the rental V85TT?

Keep safe
Al
 

Tassie Mike

Tuned and Synch'ed
Joined
Sep 8, 2010
Messages
48
Location
Taswegia, the best riding country in the world.
Hi Y'all,
I've followed this thread with interest. I have no loyalty to any "major brand", but I do need an exhaust system that will be legal in Australia, or at least able to convince the average walloper that it is. Todd, if I understand correctly, your systems are not homolagated for street use? Correct me if I'm wrong. I'd love to have the better headers as well as the rest, particularly if they save significant weight and provide more low-down grunt.
 

TenBelowGriso

Tuned and Synch'ed
Joined
Feb 2, 2020
Messages
28
Location
USA
Speaking of exhausts, is there a significant difference between the various Y-pipes that are available? The Agostini part is less expensive, but doesn't have a hangar and is made of more parts and looks to have a smaller diameter, while the GTM and Mistral parts have the hangar and are single piece units with larger diameters. I'm mostly looking to lose the heat generator under the bike and maybe claw back a little sound with the stock can for now.
 

timax

Tuned and Synch'ed
Joined
Jan 22, 2017
Messages
72
Location
Sydney Australia
Hi Y'all,
I've followed this thread with interest. I have no loyalty to any "major brand", but I do need an exhaust system that will be legal in Australia, or at least able to convince the average walloper that it is. Todd, if I understand correctly, your systems are not homolagated for street use? Correct me if I'm wrong. I'd love to have the better headers as well as the rest, particularly if they save significant weight and provide more low-down grunt.
Hi Mike, i have a feeling we need to have the tested db printed onto the muffler to be legal. And again "technically speaking" its illegal to mod the exhaust so it is louder than factory. Depends on the cop who pulls you over i suppose. I know the Agostini cans on my v7 are louder especially without the db killers but i dont seem to get the attention of the police thankfully. How is the V85? Im thinking about one for 2 up riding.
 

TenBelowGriso

Tuned and Synch'ed
Joined
Feb 2, 2020
Messages
28
Location
USA
I definitely dig my V85, but I haven't done any 2-up riding and it's my first ADV bike so I don't have a lot to compare it to. At the time I was looking for something more touring-oriented and I thought it was silly to get a bike to cover lots of miles with a chain that took constant maintenance, but that cut the options down quite a bit.
 

GTM®

Administrator
Staff member
GT di Razza Pura
Joined
Jul 1, 2009
Messages
12,447
Location
Malibu
Speaking of exhausts, is there a significant difference between the various Y-pipes that are available? The Agostini part is less expensive, but doesn't have a hangar and is made of more parts and looks to have a smaller diameter, while the GTM and Mistral parts have the hangar and are single piece units with larger diameters. I'm mostly looking to lose the heat generator under the bike and maybe claw back a little sound with the stock can for now.
Yes there is a significance in construction as you noted. I also offer a lifetime guarantee.
 

Moto Vita

Just got it firing!
Joined
Nov 13, 2019
Messages
10
Location
WA
Yes there is a significance in construction as you noted. I also offer a lifetime guarantee.

Can you elaborate on the three different y pipes you list on your website, pros and cons? Will you still be carrying all three in the future? I'd like to use the stock muffler and I'm very critical of low rpm, as in just off idle, performance, that's one thing I'm not satisfide with now. Mostly I just need to lose the hot box under the engine.
 

GTM®

Administrator
Staff member
GT di Razza Pura
Joined
Jul 1, 2009
Messages
12,447
Location
Malibu
Can you elaborate on the three different y pipes you list on your website, pros and cons? Will you still be carrying all three in the future? I'd like to use the stock muffler and I'm very critical of low rpm, as in just off idle, performance, that's one thing I'm not satisfide with now. Mostly I just need to lose the hot box under the engine.
The others are machine bent 20g (thin) steel, mine are 18g hand-formed. Power characteristics with stock headers would all be about the same. I have a full system built and ready to sell, but I don't have access to the ECU still. Only that will resolve your low throttle issues, along with heat and power increases. I expect to get 10+ hp at the tire with my full kit and open air box lid once I can get the fueling sorted.
 

Bisbonian

Cruisin' Guzzisti
Joined
Aug 21, 2009
Messages
355
Location
Tucson, AZ
Can you elaborate on the three different y pipes you list on your website, pros and cons? Will you still be carrying all three in the future? I'd like to use the stock muffler and I'm very critical of low rpm, as in just off idle, performance, that's one thing I'm not satisfide with now. Mostly I just need to lose the hot box under the engine.

I think there is supposed to be an updated map available from the factory that deals with low speed fueling. I have no idea if your dealer will offer the update for free or if you'll be charged, it sounds like dealer policy on software updates varies greatly.
 

Moto Vita

Just got it firing!
Joined
Nov 13, 2019
Messages
10
Location
WA
I think there is supposed to be an updated map available from the factory that deals with low speed fueling. I have no idea if your dealer will offer the update for free or if you'll be charged, it sounds like dealer policy on software updates varies greatly.

My local dealer installed the new map several weeks ago, it made some subtle but noticeable changes, it seemed like a minor improvement overall, but did not fix the hesitation I feel when clutching at low speed in first gear. I've ridden two bikes and they were both the same and the dealer said he noticed it on his demo as well.
 

TenBelowGriso

Tuned and Synch'ed
Joined
Feb 2, 2020
Messages
28
Location
USA
Can't speak from actual experience, but depending on what riding you do and how much weight you have on the bike, it may be a little anemic for 2-up riding. It's got lovely grunt at county road speeds and probably would hold up with a pillion but it's a little asthmatic on the freeway.
 

TenBelowGriso

Tuned and Synch'ed
Joined
Feb 2, 2020
Messages
28
Location
USA
Side note on the exhaust side of things, has anyone removed the passenger foot peg mounts and had issues with melting their boots on the pipe on the left side of the bike? I've got fairly big feet (US size 13 or so) and most bikes, V85 included, give me issues with my heels hitting the passenger foot peg bracket. I know I could take it off the V85 but it looks like I'd be putting my heel potentially against the pipe, which I'm guessing wouldn't be great.
 

ol phart

Tuned and Synch'ed
Joined
Aug 27, 2019
Messages
44
Location
Townsville, Queensland, Australia
Side note on the exhaust side of things, has anyone removed the passenger foot peg mounts and had issues with melting their boots on the pipe on the left side of the bike? I've got fairly big feet (US size 13 or so) and most bikes, V85 included, give me issues with my heels hitting the passenger foot peg bracket. I know I could take it off the V85 but it looks like I'd be putting my heel potentially against the pipe, which I'm guessing wouldn't be great.
I have seen photos somewhere of a bike like this, the owner put exhaust wrap around pipe in the area where the foot peg mounts used to be..
 

Faisal

Cruisin' Guzzisti
Joined
Aug 22, 2016
Messages
139
Location
Qatar
So I'm quite bored with the way the V85TT sounds when it's choked from that oven they call a catalytic convertor, and I want to install a Y-pipe and let that engine exhale with ease. Would it be detrimental to the engine where it could come to the point that an engine failure is just around the corner if I remove the cat without tuning? The bike currently has a slip on.
 

GTM®

Administrator
Staff member
GT di Razza Pura
Joined
Jul 1, 2009
Messages
12,447
Location
Malibu
Many people run open exhaust systems without fueling fixes. I've sold a very small handful of Y-pipes and mufflers, despite what air/fuel data shows. The AFRs that Guzzi runs these motors at as delivered is a head-shaker, yet they offer a warranty.
 

TenBelowGriso

Tuned and Synch'ed
Joined
Feb 2, 2020
Messages
28
Location
USA
Speaking of exhausts, @GT-Rx® do you have any insights on Mistral's full setup for the V85? It looks like they've got some larger headers, a Y-pipe, and a new hex muffler but I'm not sure how the bike would handle it without a reflash.
 

GTM®

Administrator
Staff member
GT di Razza Pura
Joined
Jul 1, 2009
Messages
12,447
Location
Malibu
Speaking of exhausts, @GT-Rx® do you have any insights on Mistral's full setup for the V85? It looks like they've got some larger headers, a Y-pipe, and a new hex muffler but I'm not sure how the bike would handle it without a reflash.
Please scan this thread from the beginning down. I will not comment on my competitor's systems, when I make a superior system with a lifetime warranty; https://www.guzzitech.com/forums/threads/v85tt-exhaust-thread.19804/#post-155160
 
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