The comprehensive GRiSO exhaust thread....

When i got it, It used to run rough from 3-4 to the point when you hit 4Krpm, it felt like powerband. That was with a termi.
I then bought a beetle map thinking the previous owner hadnt remapped it, but in the end it was the same beetle map. I did the usual things, checked the valves, cleaned injectors, zero'd the tps.
I wanted a different exhaust so had this made and the first thing I noticed was the midrange power started earlier at 3 not 4 and because a lot more usable as 3400-3600 was 110km/hr on the freeway and torque coming out of corners was nicer too. Side by side with two friends 1200s grisos and mine lurches forward as stays in front also the note is sharper like its running better.
The overall length of my two pipes is probably longer than a single fwiw

Pete Roper wrote:

All my research indicates that a short pipe will gut the bottom end and midrange. It's due to camming and the head design. If you have found different? OK.

I fitted a straight through race can, without the db killer or baffles. Didn’t like the pops and backfires and discoloured exhaust pipes.
So went back to the standard silencer. Much happier with the performance and the engine feel.
Still have the factory mapping, and also a spare titanium race can!

Installed a new GPR Ghisa muffler with DB in.
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So I just bought a used 2017 GRiSO that's bone stock and need advice from the collective on exhaust setups. My plan for fueling is purchasing a Beetle map and if that doesn't get it up to snuff then maybe a power commander. My ECU cables are on the way from Lonelec already.

I like stock or slightly louder then stock but not obnoxiously so, DB killers will stay in. It's super hard to judge loudness based on youtube clips though. I had a 2009 8v with the Termi exhaust 11 years ago that was totaled in an accident so I'm familiar with that and thought it sounded decent and I liked the look but there seems to be better options then the Termi now.

I really like the look of the MassMoto 2-1-2 but from what I gather on this thread it has very poor performance qualities and is also really loud? (https://www.massmoto.it/prodotto/impianto-semi-completo-2in2-inox-hypothesis-moto-guzzi-GRiSO-1200-8v/)

I like the Arrow full titanium system (https://www.af1racing.com/Arrow-Full-Exhaust-System-for-09-17-GRiSO-1200-8V) but someone was saying it doesn't have the S-Bend at the 2-1 but the picture on the above website loos like it does or maybe I don't know what I'm looking at?

I like the look of the Agostini Hydroformed (https://www.af1racing.com/Agostini-Hydroformed-DK-Steel-Slip-On-For-MG-GRiSO) or even this Agostini slip on (https://www.af1racing.com/Agostini-Black-Steel-Slip-On-For-MG-GRiSO).

What would people recommend?

I would recommend the stock exhaust with a beetle map
It is punchy and smooth and still growls well.

(And of course, valve clearances set, throttles balanced, TPS reset, autolearning reset)

Forget Power Commander, just forget it.

So, you live on Drury lane then?

sideshowbob wrote:

So, you live on Drury lane then?

When I finally buy land enough to put my own private road on then I will definitely be calling it "Drury Lane". [You must be registered and logged in to see this image.]

Forget the MassMoto. It doesn't do the 8V any favours.

Either Agostini will work, and I have maps for both, provided the dB killers stay in.

I have map for the full Arrow system, though it is unlisted and only available by request. I run an Arrow midpipe on my GRiSO, and can be made to work by adding a few more Unicorn sparkle-farts. It works best with the Mistral Hi-Pipe.

You will NOT need to use a Power Commander with my maps.

Does anyone have a link to an aftermarket exhaust in stock and ready to ship in the US? AF1 is saying 3 to 6 months wait and all the other usual suspects are just showing nothing in stock.

drawnverybadly wrote:

Does anyone have a link to an aftermarket exhaust in stock and ready to ship in the US? AF1 is saying 3 to 6 months wait and all the other usual suspects are just showing nothing in stock.

GuzziTech has exhausts ready to go I think.

drawnverybadly wrote:

Does anyone have a link to an aftermarket exhaust in stock and ready to ship in the US? AF1 is saying 3 to 6 months wait and all the other usual suspects are just showing nothing in stock.

What exhausts are you interested in? eBay often has well known options available, or you might try Agostini in Mandello del Lario.

Literally looking for anything ready to ship in the US. Not looking to get anything from overseas or Italy, I don't want to depend on global shipping right now. Even the stuff that shows as in stock on US websites is not actually in stock (surprising how many stores are actually just drop shipping) and the large diameter of the GRiSO exhaust system makes it tough to even find a universal exhaust that fits.

Look, I can't help you with within the US but the Termi is in stock at TLM in Holland. I use them a lot for stuff and get it shipped direct from them to customers all over the world. To the US usually takes between a week and ten days. At the rate you're going you'll waste more time trying to find something in the US. Shipping is €35 world wide. Buy it through me and I'll knock another $50 off their price.

Thanks for the offer, I'll keep searching.

Mistral no longer make or supply pipes in carbon.
In the UK they have a new collaboration with Moto Corsa.
Guzzibits also have a collaboration though Mistral don't brag about it unlike the Moto Corsa one.
Ordered the Mistral Stainless Steel Reverse Cone Short Polished Silencer £390inc shipping from Guzzibits.
£450 plus shipping from Moto Corsa  
Selling current pipe to pay for it, wont mention the make as dont want to offend the purists

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Mistral Short Conical Polished in Stainless with cat.

Nothing worse than posting a post on top of a post.
Oh well so guess having read all the way thru, unlike last time when was just looking to see if my intended was picured and recorded. I've discovered I've made a boo boo.
This pipe is only about 8inches shorter than the Termignoni.

Did older versions come without cats, I always assumed after market pipes were like race pipes.
This pipe is catted up proper, designed to run on the factory map with no changes except resetting the trims. (yet to do)
Obviously intend to balance and apply a beetle map at some point soon.
Are you saying beetle mapped my bike is going to run like an old dog    its not significantly shorter than the arrow?

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Well it sounds more gruff than the Termi.....

I was eyeing Mistral short in black. My bike came with a true shorty system...sounded very tinny and big harmonics at some rpms. Stepped into a deal on a used Agostini conical and mapped for that. I've had the opportunity to pop on an arrow as well-- nicely made piece--unfortunately the fixed mounting point doesn't work with my 'different mid/link pipe. I thought of trying to capture sound/video across the three, but I don't really have equipment to do a comparison justice.

SMTCapeCod wrote:

I was eyeing Mistral short in black.  My bike came with a true shorty system...sounded very tinny and big harmonics at some rpms.  Stepped into a deal on a used Agostini conical and mapped for that. I've had the opportunity to pop on an arrow as well-- nicely made piece--unfortunately the fixed mounting point doesn't work with my 'different mid/link pipe.  I thought of trying to capture sound/video across the three, but I don't really have equipment to do a comparison justice.

Pipe fitting was a breeze except for needing assembly paste, I suppose it keeps the lines clean as room for a graphite gasket would heave incurred a step.
Sound is similar possibly not as intrusive around 80mph as the Termi, reset trims if thats what that does by pulling main fuse for 10 mins.
Always concerned me painted pipes, black attracts the shit and heat bakes it on.
Can't say noticed any difference in performance, still moves sharpish when required and returns a good clip, so much lighter the bike am loving it
Hoping to get a beetle map with a lower clutch tickover, can anybody explain to me what thats all about? Mind let the clutch out a tad and the revs settle nicely around 1200ish.

Hi All, brand new GRiSO owner here looking for some advice.

First off, about the bike, I managed to score a totally stock 2012 Tenni Green SE model, 1200 8V with factory rollers. Only 9300 miles, and for a decent price too! I have loved this model ever since I first saw it in the flesh and now mine is in the garage.

I have only ridden it about 90 minutes home, and already I've noticed the... underwhelming throttle response and torque at low and mid-range engine speeds. I was expecting a bit more grunt, tbh, and from research it seems like much is to be desired in the stock engine map.

Thus, my question: What exhaust and tune should I go with? I want a bit more rumble, but nothing approaching the "annoying the neighbors 2 blocks over" that all the HD owners seem to enjoy so much. A mild increase in volume is fine, as the stock can is rather quiet.

Currently, I am leaning towards a Mistral Conical in the brushed (or matte or similar) finish along with a Beetle map. Will I be happy with that? Also considering the GTM Meg exhaust, but I have a slight concern about committing to a version with or without a DB Killer, and I don't see a Beetle map for that particular exhaust; the GTM tune with flashing hardware is an additional $500 which seems ludicrous to me.

Feedback appreciated. My main goals are: increasing throttle response, better looks but keeping the retro/classic theme (no carbon fiber, for example) and a little more of a throaty engine sound.

Thanks! This is a great forum

Buellbloke wrote:

Selling current pipe to pay for it, wont mention the make as dont want to offend the purists

Are you still selling the "unnamed make" pipe?

iminspaaace wrote:

Buellbloke wrote:

Selling current pipe to pay for it, wont mention the make as dont want to offend the purists

Are you still selling the "unnamed make" pipe?

That was a Termignoni no was never selling it, mentioned in a post was interested in moving it on right when joined the Ghetto.
A local to me Degs expressed his desire to own it so it became his, whilst he waited for me to obtain my new Mistral polished shorty in stainless.
Was only offered with wheels to tempt people out of the woodwork as hoping to shift wheels.
I have wheels now!
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Current pipe
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Current pipe has a cat, its not a race pipe, it sounds similar to Termi though less bass.
Have done the whole loud pipes to death with Vance & hines big shots on the fat bob am happy enough with mellow now.

Termignoni


Mistral before reset trims

I have the Agostini Oval and really like the tone and the fact that it's nearly as quiet as the stocker. A Beatle Map made a world of difference in the bottom end torque and smoothness.

Where are you in Colorado? We get out there to play most years. We have family in Arvada and Ft. Collins.

@Buellbloke
Nice carpet