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Aftermarket Mufflers - Mistrals


swooshdave

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So do I need to remap for the new mufflers?

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nope

 

do a decent tune-up. repeat on time.

 

https://www.v11lemans.com/forums/index.php?showtopic=19610

Actually you should remap. Of course it's debateable . But to my experience when I first got my Lemans and threw on Mistrals and noticed it ran okay but a little hot and lost a little top end. I was also told the ecu would adjust to a crossover (because getting a crosssover is what getting pipes will lead to) is total hogwash.

I eventually brought my bike running like crap to Guzzitech for a custom map. It became a whole new bike.

Bikes with early era FI should be remapped. Newer stuff is a case by case . But to get specific to the MM in the V11? Get it reflashed. Not doing it you're not just sacraficing power for tone you're doing your bike a disservice..

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Dave, how are you liking the cans? I think the Agostini's on my '00 Sport are basically the same can as the Mistral, and I gotta say I like the sound they make much better than the MG Ti cans. Deep, loud enough, with no "glass pack" rasp. I think you made the right choice over the Staintune's.

I think they are great. Low rumble at idle but not annoying when riding. Just what I wanted.

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So do I need to remap for the new mufflers?

Sent from my iPhone using Tapatalk

nope

 

do a decent tune-up. repeat on time.

 https://www.v11lemans.com/forums/index.php?showtopic=19610

Actually you should remap. Of course it's debateable . But to my experience when I first got my Lemans and threw on Mistrals and noticed it ran okay but a little hot and lost a little top end. I was also told the ecu would adjust to a crossover (because getting a crosssover is what getting pipes will lead to) is total hogwash.

I eventually brought my bike running like crap to Guzzitech for a custom map. It became a whole new bike.

Bikes with early era FI should be remapped. Newer stuff is a case by case . But to get specific to the MM in the V11? Get it reflashed. Not doing it you're not just sacraficing power for tone you're doing your bike a disservice..

I need to do more research and see if someone will share their map.

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:notworthy:  Meinolf has likely constructed the most refined V11 map(s) in the world. There are specific adjustment parameters (valves, CO,  and air bypass screws) to observe.

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  • 1 year later...
41 minutes ago, western trucker said:

Hey I’m looking at getting new mufflers or my current ones fixed anyone know the pipe Diameter as I’m away from bike at the moment should have measured them when there last.

Cheers 

 

I’m thinking black and loud ha ha

so which mufflers are you running WT? and what's needing fixed?

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I have some staintunes on there but they are dented badly so need re skinning I like the tone just they look terrible at the moment I have already contacted Cycleworks about getting them fixed so that is an option just thought I’d look about and see what’s around.

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8 hours ago, western trucker said:

I have some staintunes on there but they are dented badly so need re skinning I like the tone just they look terrible at the moment I have already contacted Cycleworks about getting them fixed so that is an option just thought I’d look about and see what’s around.

As I recall, Staintune are welded construction. Doesn't mean repair is impossible, just more difficult, ie; must be re-welded. Being stainless, they'll polish up nice.

7 hours ago, stewgnu said:

It’d actually be quite interesting to know the cost of repairing damaged silencers.  I had assumed it wouldn’t be worth it.

The type with riveted on straps and removable end caps are easy to repair. DIY. If the end caps aren't messed up. Carbon fiber is a different story.

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So a mistral titty silencer would be one long nice titanium weld and a re-build...?  Even so, doesn’t sound very diy footgoose?  Or I am soooo behind in the guzziworld!

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17 hours ago, western trucker said:

I have some staintunes on there but they are dented badly so need re skinning I like the tone just they look terrible at the moment I have already contacted Cycleworks about getting them fixed so that is an option just thought I’d look about and see what’s around.

You cant reskin Staintunes as they are an all welded SS muffler. Just buy a new one or get the dents pulled out and maybe some weld and grind and polish.

Ciao  

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1 hour ago, stewgnu said:

So a mistral titty silencer would be one long nice titanium weld and a re-build...?  Even so, doesn’t sound very diy footgoose?  Or I am soooo behind in the guzziworld!

If your Mistral is Ti and built like this Guzzi Ti can, with a sleeve, 2 end caps,  a strap covering the end caps, and some stuff inside, then drill out the rivets and pull it apart. Everything should slide out. Might be some sticky stuff holding the glass fiber, use yer knife.

IMG_0438.JPG

put the sleeve over something to use as a dolly and tap away, gently. Any imperfections in the dolly or hammer surface will show on the metal.

IMG_0440.JPG

get some new alm pop rivets and pop back together. 3m scratch pad and sand paper to get some finish back. polish if needed. It ain't perfect but it worked for me. Most of the damage was covered by the hanger strap.

IMG_0456.JPG

It only took a few hours and a year later I fell over again so I get to fix it again! (that's why alm rivets) A bit more difficult this time, as you can see on the end cap...

IMG-1311.JPG

 

 

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If you experiment a little, you can find a grit of sandpaper which will reproduce the factory "grain" in the alloy. Then, a judicious amount of "shoe shining" motion can render the repaired section even less visible.

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Agreed. I have spent easily four times the amount of time experimenting with the finish as I did repairing. The hammering has changed the composition and "color" of the metal, and though I can make it more consistent with sanding, it's also more shit looking. Shoe shining it with metal sanding belt brings it back to as you see in the photo. Fortunately the damage is under the hanger strap and it doesn't show nearly as bad on the bike as in the photo. I have another idea to try yet, so I'm not giving up.

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