Muffler Upgrade Question

Beauty and the Beast

· #2 · Feb 19, 2015

liquiddog said:
Does upgrading to either the Screamin Eagle or V&H muffler require a change to the fuel injection settings?

I cant speak on th Screamin Eagle but I have the Vance and Hines slip on and I did not have to make a change and I double checked with two dealership to make sure.

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You might not have to, but you should. The bikes come very lean. Increasing the air flow, either through a freer flowing exhaust (smaller change), or an air cleaner (bigger change), leans things out even more. The bike will run hotter, you'll notice a significant increase in the popping at deceleration, and the worse case scenario is burned out valves. Probably not something you need to worry about right away, but yes, as soon as you can you should either get a stage one tune or even better, an ECM controller like the FP3 or Dynojet. If you add the air filter it's definitely necessary.

I believe the Street does have an O2 sensor that should take minimal care of trying to keep the bike from getting waaay too lean, but someone should correct me on that if I'm wrong.

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Flamegirl

· #4 · Feb 19, 2015

If it is only the muffler you do not need to have the stage 1 done or use a controller. Unless you change the air filter along with the muffler. Then you should get the stage 1 or controller.

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Solo750owner

· #5 · Feb 20, 2015

You can use the Bassani, Vance & Hines and Screaming Eagle slip on mufflers without having to change the stock fuel set up. How do I know this, My dealership had 3 Street 750's set up with each different slip on so I could hear how they sounded. Now, if you change the stock air breather and increase the airflow with a Vance & Hines, Yes, you will need to add a fuel pack.

Btw, I decided to go with a Firebrand Loose cannon slip on muffler which is sitting in the box in my living room cause its -3 degrees F. It sounded good and the price was less than the other 3 mufflers like $100 dollars less. Not knocking the others, I almost went with the Bassani.

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liquiddog

Discussion Starter · #6 · Feb 20, 2015

Based on the replies, it sounds like the stock air intake is ultimately the bottleneck. So changing just the pipe only changes the sound, not airflow. Thanks for all the replies! I'm going to go with the V&H.

If I feel the need to add power I'll go with the dealer flash upgrade and upgraded air intake.

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AsphaltAssault

· #7 · Feb 20, 2015 (Edited)

liquiddog said:
Based on the replies, it sounds like the stock air intake is ultimately the bottleneck.

I most definitely agree with your assessment, here is what I wrote in another thread, " [i purchased] the vance and hines VO2 air filter in December which made all the difference! Especially over that garbage stage 1 screaming eagle filter I had gotten along with the "download" Speaking of which, to any other members reading this please don't make mistake guys, take my word for it and save yourself the time and money and just get a non-HD-aftermarket high air flow filter like the V&H, the difference is night and day. I regret not taking before and after video footage but I simply did not predict that the new air filter would have the all encompassing impact on my ride as it did (engine breathing better an louder, louder and smoother exhaust note, shifting-gears feels smoother and not as "clunky", better engine response, smoother acceleration [especially in the low end]). I honestly only initially got it because I liked the aesthetics of it over the "black box" that comes with the 750s....when I even talked to the dealship about how my latest purchase would affect my warranty they tried to tell me that the difference in performance over their stage 1 SE filter would be minimal if anything...oh how utterly full of **** those people can be!"

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liquiddog

Discussion Starter · #8 · Feb 20, 2015

Can the bike be left out in the rain with the V&H air intake kit? I park it at a train station for the day. In Austin, it can be a 0% chance of rain, and flash flood an hour later.

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Flamegirl

· #9 · Feb 20, 2015

AsphaltAssault said:
I most definitely agree with your assessment, here is what I wrote in another thread, " [i purchased] the vance and hines VO2 air filter in December which made all the difference! Especially over that garbage stage 1 screaming eagle filter I had gotten along with the "download" Speaking of which, to any other members reading this please don't make mistake guys, take my word for it and save yourself the time and money and just get a non-HD-aftermarket high air flow filter like the V&H, the difference is night and day. I regret not taking before and after video footage but I simply did not predict that the new air filter would have the all encompassing impact on my ride as it did (engine breathing better an louder, louder and smoother exhaust note, shifting-gears feels smoother and not as "clunky", better engine response, smoother acceleration [especially in the low end]). I honestly only initially got it because I liked the aesthetics of it over the "black box" that comes with the 750s....when I even talked to the dealship about how my latest purchase would affect my warranty they tried to tell me that the difference over their stage 1 SE filter would be minimal if anything...oh how utterly full of **** those people can be!"

Did you reflash the bike after you put on the V&H breather? I am planning on adding the V&H breather and having the dealer do the stage 1 download.

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AsphaltAssault

· #10 · Feb 20, 2015

Flamegirl said:
Did you reflash the bike after you put on the V&H breather?

No because my understanding is that the ECM download through the dealership is a preprogrammed set of parameters. So it would be a waste of money to get "reflashed." Besides even the dealership told me that the ECM download should be just fine with the VnH air filter, and that if it was not that the exhaust would "make extra popping noises." (Rather vague I know, but that is all they could tell me).

Anyways I have 900 miles booked in with the VnH air filter and I have not noticed nor had any issues this far, very happy with the purchase.

Your ride will surely show you how thankful it is you got rid of that silly black box and got a real air filter! ;-)

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liquiddog

Discussion Starter · #11 · Feb 20, 2015

Sorry I may have my terminology of. I assumed they would "reflash" the ECM with a new stage 1 image. Didn't know they could reprogram the existing software.

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AsphaltAssault

· #12 · Feb 20, 2015 (Edited)

liquiddog said:
Can the bike be left out in the rain with the V&H air intake kit? I park it at a train station for the day. In Austin, it can be a 0% chance of rain, and flash flood an hour later.

You COULD leave it exposed under such conditions but overtime your filter will get dirty much much faster. You can get a "rain sock" to pull over your air filter if you want to save yourself a little bit of maintenance in the long run. Here's the one I got: http://www.revzilla.com/motorcycle/roland-sands-venturi-rain-sock#fitment_tab

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liquiddog

Discussion Starter · #13 · Feb 21, 2015

Thanks much for that link. I'm going to go for the V&H muffler first, zombie mirrors second (lol), and V&H air intake w/ rain sock you mentioned + HD software update last.

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Epijay

· #14 · Feb 27, 2015

I got the V and H and the FP3 today- man! What a difference! The bike actually feels lighter and responds really nicely to every subtle move you make with the throttle and gears- if you can afford it, run, don't walk, to the dealership and have it installed - night and day does not even begin to describe it- additionally you have bluetooth connectivity to your smartphone to provide all the other readings the bike did not come with such as RPM etc..

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Obtuse

· #15 · Feb 27, 2015

Epijay said:
I got the V and H and the FP3 today- man! What a difference! The bike actually feels lighter and responds really nicely to every subtle move you make with the throttle and gears- if you can afford it, run, don't walk, to the dealership and have it installed - night and day does not even begin to describe it- additionally you have bluetooth connectivity to your smartphone to provide all the other readings the bike did not come with such as RPM etc..

Exactly. I did all the install myself, that is the V&H slip-on and air cleaner, FP3, phone mount, USB charging cable, etc. So nice to see RPMs at a glance, as well as what gear I am in. No more searching for 7th gear. I also changed out the heat shields with the Harley Buckshots.

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Epijay

· #16 · Feb 28, 2015

What phone mount did you use?

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Obtuse

· #17 · Mar 2, 2015

Epijay said:
What phone mount did you use?

Minoura.

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Rising Sun Sailor

· #18 · Jun 11, 2016

Question for you all.

I've already installed the Screaming Eagle intake and am looking at either the Bassani (Long Straight) slip on or TBR COMP-S Slip on.

With that, which exhaust do you recommend and do I need to retune the engine? Understand the bike runs lean (helped my US-Spec bike pass emissions here in Japan), but what do you all recommend there?

Thanks!

Sent from my iPad using Tapatalk

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[email protected]

· #19 · Jun 11, 2016

V&H V02 naked intake
V&H FP3
I chose Basani straight shorts, passing neighbor's off oh yeah.
Do all 3 upgrades and you will be amazed.
This little bike is a blast to ride now.
Oh yeah and upgrade to a high performance brake pad.