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MIVV Exhaust

L

leafman60

Cruisin' Guzzisti
Joined
Jan 7, 2009
Messages
219
Location
Pensacola, FL
I recently received an inquiry about how I like my MIVV muffler on my 2012 Stelvio NTX.

My email response-

I like the MIVV muffler. I had tried a GPR but I find the MIVV sounds better.

When you install the MIVV, I suggest coating the inside of the carbon fiber body clamp with RTV silicone and letting it cure before installing the strap to the muffler so it will help grab the muffler and keep it from slipping back and forth. MIVV provides some adhesive friction bumps for this purpose but they are not adequate. Don't glue the strap to the muffler. Also be sure to tighten the header pipe clamp, maybe even install a spring, to keep your muffler from vibrating and slipping out of the joint. Over time, this can be an issue.

I used my baffle in the muffler for a while but I now am running the MIVV without the baffle and I don’t find it too loud. I like the sound. The length of the body and the adequate packing causes it to produce a deep tone.

My first MIVV developed a problem where the internal perforated core broke loose from its welding.I returned it to my seller (http://www.pjsparts.com/)and they got me a replacement under warranty from the MIVV factory.Everything is working well for several thousand miles now.

Regarding fuel mapping- I suggest you try what you have and see how it works.There are many experts out there who may not be totally correct for everybody in their assertions. If you continue to have problems, I can send you a map that I obtained from a Canadian friend that works best for me. I am also running a free-flow air filter.

One suggestion-Pay attention to your spark plugs.I experienced a slight stutter for a long time that nobody could diagnose.Turns out that my problem was one of my spark plugs! I am currently using the Denso Iridium plugs with great results. I would change them out every 6-12k miles.

Once you do all of this, your bike may be like mine and run like an energetic ape.Be aware, however, that your fuel consumption may increase.There is a cost for everything.

Let me know.

Thanks
DL
 
Last edited:
leafman60 said:
I recently received an inquiry about how I like my MIVV muffler on my 2012 Stelvio NTX.

My email response-

I like the MIVV muffler. I had tried a GPR but I find the MIVV sounds better.

When you install the MIVV, I suggest coating the inside of the carbon fiber body clamp with RTV silicone and letting it cure before installing the strap to the muffler so it will help grab the muffler and keep it from slipping back and forth. MIVV provides some adhesive friction bumps for this purpose but they are not adequate. Don't glue the strap to the muffler. Also be sure to tighten the header pipe clamp, maybe even install a spring, to keep your muffler from vibrating and slipping out of the joint. Over time, this can be an issue.

I used my baffle in the muffler for a while but I now am running the MIVV without the baffle and I don’t find it too loud. I like the sound. The length of the body and the adequate packing causes it to produce a deep tone.

My first MIVV developed a problem where the internal perforated core broke loose from its welding.I returned it to my seller (http://www.pjsparts.com/)and they got me a replacement under warranty from the MIVV factory.Everything is working well for several thousand miles now.

Regarding fuel mapping- I suggest you try what you have and see how it works.There are many experts out there who may not be totally correct for everybody in their assertions. If you continue to have problems, I can send you a map that I obtained from a Canadian friend that works best for me. I am also running a free-flow air filter.

One suggestion-Pay attention to your spark plugs.I experienced a slight stutter for a long time that nobody could diagnose.Turns out that my problem was one of my spark plugs! I am currently using the Denso Iridium plugs with great results. I would change them out every 6-12k miles.

Once you do all of this, your bike may be like mine and run like an energetic ape.Be aware, however, that your fuel consumption may increase.There is a cost for everything.

Let me know.

Thanks
DL
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