Exhaust Mod for 910S Brutie's Questions. - Page 2 - MVAgusta.net
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post #11 of 15 (permalink) Old 12-26-2008, 04:14 PM Thread Starter
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Originally Posted by dsmvbrut View Post
OK, TOUCHÉ.
IF I MEET HIM AROUND, I'LL TRY THE PHOTO !
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post #12 of 15 (permalink) Old 12-26-2008, 04:37 PM Thread Starter
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I have Arrow midpipe on my 910S. I didn't get the Arrow Thunder because I didn't want to disturb the stock look. Compared with the stock exhaust configuration, the Arrow midpipe sounds much more throaty and definitely louder. Arrow claims it add 4-5 HP. Although I haven't verify it, it does feel more torquey.

My only gripe is that the bike seems to run a bit hotter (within 10 degrees F) than before, although I thought it's supposed to run cooler with the midpipe.... It may just be something particular with my bike though because it seems like most people with the Arrow midpipe experience the opposite.
Thanks a lot for the info. I think I'll like the torquey-throaty thing.
Midpipe leads the poll...definitely
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post #13 of 15 (permalink) Old 12-26-2008, 04:56 PM
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^ question...

does the stage 1 eprom come w/ the Arrow Thunder setup STANDARD? I have the exact same setup and wondered for a long time...
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post #14 of 15 (permalink) Old 12-27-2008, 08:02 AM
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It's somehow 65 and clear here in Pittsburgh, Pennsylvania.

Anyways, I've got a BMC air filter and a Fast by Ferracci mid pipe, not to mention a power commander, and it makes this bike quite the monster. I suggest doing this as your first step and see how you like it. If you want more, get the stubby.

Time is a delusion. Lunchtime doubly so.
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post #15 of 15 (permalink) Old 12-27-2008, 12:04 PM
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The midpipe is definitely the best value for money. Not only do you let the exhaust flow better but you get rid of a TON of weight by eliminating the cat. We sell quite a few of these and had them on our own bike. We later changed out to the Thunder system. Not for everyone but it does it for us. Really cleans up the rear and shows off the 'naked' rear wheel. The sound of the bike with just the midpipe change is minimal but you'll see a throatier growl. Especially when you change out the filter as well. As with the other comments, the bike will run just fine without a PC or chip with just the midpipe and filter.

Regarding the heat issue, we've noticed that with the stock cat, my right boot gets so hot it melts my heel. When we switched out to the midpipe, the heat bottle neck seems to move a bit further back towards the stock pipes. Underway the bike runs a bit cooler and for us the right heel is a bit better. As with most case when you remove the cat and retain the restrictive stock slipons the heat build up is transferred from the cat to to slipons. This is why it is not recommended to eliminate the cat if you are using stock slipons for certain bikes where this heat buildup could damage the slipons and other components. An example is with some Ducatis that have the undertail restrictive slipon configuration.

With the Thunder, we noticed that the heat build up is no longer and issue and it does not affect my right foot anymore. This is because the midpipe included with this kit is much shorter and the slipon much less restrictive. The greatly reduced restriction also does a better job at scavenging off any heat buildup.

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Last edited by Cazadore; 12-27-2008 at 12:09 PM.
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