Author Topic: Unplugged OEM V7III exhaust? (Read 6738 times)

Daleroso · « **on:** July 16, 2018, 09:38:25 PM »

Anyone unplug the OEM exhaust on the V7III Stone, Carbons, Milano style exhausts yet? If so, how please? I would like to increase my Carbon Shine's heartbeat but don't want to spend $600, $800, $1000 plus for slip-ons.....Again. I've done it enough times.

rtbickel · « **Reply #1 on:** July 16, 2018, 09:46:47 PM »

A 20 inch drill bit or so should take care of it.

egschade · « **Reply #2 on:** July 17, 2018, 10:08:52 AM »

I presume that with the drill bit method you'll need to be very careful about not going too far and hitting the cats. Did see a Youtube on someone taking a hole saw to the end of a Stornello muffler to get a larger opening. https://www.youtube.com/watch?v=PUs7164NMec

Either way it's a pretty permanent 'update'.

yogidozer · « **Reply #3 on:** July 17, 2018, 10:12:16 AM »

be sure you are going to like a louder exhaust. no going back

Kev m · « **Reply #4 on:** July 17, 2018, 10:38:56 AM »

So much meh in search of ???

FWIW (from a guy with 4 bikes with stock exhausts) most will get a little louder with age.

I actually like the way they all sound, though I do admit my Mk I V7 sounds more, uh, sedate. I prefer to think of it as gentlemanly camouflage.

Daleroso · « **Reply #5 on:** July 17, 2018, 11:55:40 AM »

Thks😃 I've seen the hole saw video but not sure that's the abswer here. The drill bit idea either. The ctr of these mufflers extend outward & you can flashlight all the way through. I'm after a full mellow tone.
I like a flowmaster, glass-pack tone on the right 4 wheeler. Not straight pipes.

egschade · « **Reply #6 on:** July 17, 2018, 12:13:00 PM »

If you look closely in the V7 III muffler end you can see the exhaust tip is actually a smaller diameter pipe that bends towards the inside of the bike. I presume this means it's a 'classic' tube-baffled muffler where gasses are forced though a series of disconnected tubes to reduce noise. Given this design the hole saw / uncorking the tip probably won't work at all and just make a huge mess of things. The muffler cap is welded so there's no way short of major surgery to remove the baffle to monkey with it.

Feel free to go for it and let us know how you do. I'm with Kev in that I'll leave the OEM alone. I'll wait for some reasonably priced 2nd hand mufflers to show up on eBay to play around with.

rocker59 · « **Reply #7 on:** July 17, 2018, 12:23:12 PM »

Quote from: Daleroso on July 17, 2018, 11:55:40 AM

Thks😃 I've seen the hole saw video but not sure that's the abswer here. The drill bit idea either. The ctr of these mufflers extend outward & you can flashlight all the way through. I'm after a full mellow tone.
I like a flowmaster, glass-pack tone on the right 4 wheeler. Not straight pipes.

d00d. The answer is: $$$$.

Daleroso · « **Reply #8 on:** July 17, 2018, 03:03:11 PM »

After really studying the innards a few times egschade & rocker59 confirm my actual conclusion & I appreciate it. Just thought I'd toss it out there. For now, patience is the answer.

malik · « **Reply #9 on:** July 17, 2018, 05:14:11 PM »

If you don't want to spend the money, one alternative if to check out what's available from China. I've a mate who picked up a pair of classy-looking slip ons for his 1200 Sport for about $AUD150 & he's pleased. Sound fine, too.

egschade · « **Reply #10 on:** July 17, 2018, 09:59:39 PM »

Toying with the notion of installing these 'tunable' shorty mufflers and seeing if the bike runs worth a crap. Will probably sound cool so who cares about poor performance? https://www.ebay.com/itm/Shorty-Tunable-Motorcycle-Muffler/262842098934?hash=item3d329c24f6%3Ag%3AxfAAAOSwkSxbIj6N%3Asc%3AUPSGround%2107920%21US%21-1&_sacat=0&_nkw=motorcycle+muffler+black+&_from=R40&rt=nc&_trksid=p2334524.m570.l1313.TR1.TRC0.A0.H0.Xmotorcycle+muffler+black+.TRS1&LH_TitleDesc=0%7C0

LBC Tenni · « **Reply #11 on:** July 18, 2018, 11:24:43 AM »

I had this same Emgo can on my Ryca CS-1 and it was very good. That bike was carbed however. Give it a try. It beats dropping a grand on the Italian ones.

egschade · « **Reply #12 on:** July 18, 2018, 11:48:03 AM »

Quote from: LBC Tenni on July 18, 2018, 11:24:43 AM

I had this same Emgo can on my Ryca CS-1 and it was very good. That bike was carbed however. Give it a try. It beats dropping a grand on the Italian ones.

A bit complicated on the III. OEM cans have a integrated cat converter and air pump system. Changing to any muffler other than OEM requires you block off the air injection and most likely a re-map. Beetle may have a couple for high-end units like the Ago or Mistral but something generic like this will probably take quite a bit of fiddling to get the bike running right. May not be worth the bother just for looks and slightly better sound.

LBC Tenni · « **Reply #13 on:** July 18, 2018, 12:38:54 PM »

For what it’s worth, I know a guy who put Leo Vince cans on his V7iii without a remap or anything else and the bike seems to run great. He said he lost 1-2 MPG on the fuel economy but it’s a good trade off because the appearance and sound are big improvements. These are the Leo Vince pipes made for the V7iii. They don’t have a cat, but do have db killers. I’m pretty sure he didn’t do anything with air injection either, as he can barely turn a wrench.

Daleroso · « **Reply #14 on:** July 18, 2018, 12:59:14 PM »

I appreciate the feedback. I'll do something. The stock sound is just to flatulant IMO.
I'll check out the L Vince 1st. As stated earlier, I've chgd quite a few slip ons & full systems thru the yrs w/no issues or remap including FI bikes. The ox sensors on this V7III are 2" in front of the crossover & 11" in front of the silencers. We shall see........hear.

egschade · « **Reply #15 on:** July 18, 2018, 12:59:48 PM »

Quote from: LBC Tenni on July 18, 2018, 12:38:54 PM

For what it�s worth, I know a guy who put Leo Vince cans on his V7iii without a remap or anything else and the bike seems to run great. He said he lost 1-2 MPG on the fuel economy but it�s a good trade off because the appearance and sound are big improvements. These are the Leo Vince pipes made for the V7iii. They don�t have a cat, but do have db killers. I�m pretty sure he didn�t do anything with air injection either, as he can barely turn a wrench.

Interesting - might be worth trying to see how it runs. GuzziTech forums talk extensively about backfires from the air pump and rougher running w/o a re-map. As these Emgo cans are 'tunable' perhaps I can match the OEM flow and avoid any major issues.

Daleroso · « **Reply #16 on:** July 18, 2018, 01:10:50 PM »

Let us onow plse

Vagrant · « **Reply #17 on:** July 18, 2018, 05:01:07 PM »

While replacing the rear tire on my V7III just for grins i slipped on a pair of old Dunstall replicas I got from Dennis Kirk 14-18 years ago. Holy s--t buckets they sounded so great they are still on there 3000 miles later. Runs great no change in anything except there is a few pops on decel but that sounds good to. no change in idle or MPG's either. The V7III is really dialed in from the factory!
they still have them but I don't know if it's the same MFG or somebody else. I paid $105 for the pair with the reducers back then and had them on 2 different EV's but they were too loud on them.
If you do it be prepared to lose a few extra days of work because you will just keep riding someday and forget to go home.

Mayakovski · « **Reply #18 on:** July 18, 2018, 05:44:10 PM »

Quote from: Vagrant on July 18, 2018, 05:01:07 PM

While replacing the rear tire on my V7III just for grins i slipped on a pair of old Dunstall replicas I got from Dennis Kirk 14-18 years ago.

Hmm....

https://www.denniskirk.com/emgo/dunstall-replica-wide-mouth-muffler-80-84050.p431285.prd/431285.sku

https://www.denniskirk.com/emgo/dunstall-replica-reverse-cone-muffler-80-84051.p431286.prd/431286.sku

Possibilities.

Vagrant · « **Reply #19 on:** July 18, 2018, 06:07:52 PM »

mines the 84050 at least that's how mine looks. like I said it was a long time ago so they could have had a different MFG then but still cheap enough to experiment with. I suspect I will buy a set for my 2015 in Az. this winter too.

roadscum · « **Reply #20 on:** July 19, 2018, 05:20:11 AM »

Quote from: egschade on July 18, 2018, 11:48:03 AM

A bit complicated on the III. OEM cans have a integrated cat converter and air pump system. Changing to any muffler other than OEM requires you block off the air injection and most likely a re-map. Beetle may have a couple for high-end units like the Ago or Mistral but something generic like this will probably take quite a bit of fiddling to get the bike running right. May not be worth the bother just for looks and slightly better sound.

NAh, not required at all. I believe he ECU is adaptive and will compensate for the change.

I've installed a pair of Mistral Short cans on my V7 Special III and it runs fine without changes to the air inductions system or fuel maps. Of course the vendors that sell those products would have you believe otherwise.

I've run it with and without the baffle. there is a very muted backfire when rolling off the throttle without the baffle installed. It's simply a bit of unburned fuel igniting in the header, nut'n to be concerned bout and can usually be eliminated by blocking of the air injection port. I kind like the sound myself.

Paul

egschade · « **Reply #21 on:** July 19, 2018, 06:34:40 AM »

Quote from: roadscum on July 19, 2018, 05:20:11 AM

<SNIP>
I've run it with and without the baffle. there is a very muted backfire when rolling off the throttle without the baffle installed. It's simply a bit of unburned fuel igniting in the header, nut'n to be concerned bout and can usually be eliminated by blocking of the air injection port. I kind like the sound myself.

My understanding is that "after-ignition" is a sign of a poorly tuned bike and usually the result of the mixture being too lean. That's why so many after market pipes pop - the owner doesn't re-jet or re-map. Blocking off the air injector would increase the fuel-air mixture thus reducing the popping.

My friends Harley has after-market pipes that pop. He complains how the EFI engine is running hot and the exhaust is turning blue. Hopefully you're right about the Guzzi ECU being able to correct the mixture sufficiently. Last thing an air cooled engine needs is more heat...

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Author Topic: Unplugged OEM V7III exhaust? (Read 6738 times)