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Hi,

I wanted to know that is it compulsory to tune my bike if I have added a slip on exhaust (V & H Hi Output) and upgraded my air filter (K & N Air Filter).

I know obviously it is better/suggested to tune if the intake has been changed.

My question is that, what if i don't tune and ride my bike with these add on's. Will it create any problems to my bike ? and if it does create problems, what are the potential problems am looking at ?

i have a 2017 street 750.
 

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"Loose Nut" from Houston, Texas
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All motorcycles come from the factory running lean (more air to fuel ratio) to assist in meeting the emissions requirements. When you free up the exhaust and especially the intake, you are making the bike run leaner. Tge leaner an engine, the hotter, temperature wise, it runs. A hot engine are bad on engine internals, valves, bearings, etc, and will prematurely cause engine failure. Unfortunately, this is a case that if you play, you pay. With all that said, YES, have the bike tuned to your upgrades to ensure the longevity of the engine.
 

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I installed only the exhaust at first. And went for a couple of weeks. Then I got a full pack 3 and a KN filter. and I installed a filter and a special card from Vance. The effect is very different in operation. and the engine control became sharper and the sound became even more pleasant.
 

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Yes your bike will run, but it will not perform as good as it could and in the worse case scenario you are causing problems for later down the line.
Having said that - if you ride it with a new / different exhaust and air filter YOU will likely not notice anything is running not as it should be because the sensors in the exhaust will likely make fine adjustments so that the bike does run as good as it can.
However, as Lesblank has stated the engine will be running very lean and damage will likely result over time and as aveator-vv has also stated - the bike DOES run better when tuned.
The thing anyone needs to consider before adding aftermarket parts is 'am I prepared to do what needs to be done to get the benefit from these parts?' and factor that into the cost of buying them. An exhaust or air filter does not get fitted to change the sound of the bike - they change (improve) the way the bike performs when correctly fitted.
 

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thank you all :)
This question of yours has been on my mind for a while. How do you plan on getting the bike tuned in India? My dealership does not offer tuning at all. They just offer Screamin' Eagle parts without tuning. And they won't let me fit aftermarket tuners saying it would void the warranty.
 

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Discussion Starter #7
This question of yours has been on my mind for a while. How do you plan on getting the bike tuned in India? My dealership does not offer tuning at all. They just offer Screamin' Eagle parts without tuning. And they won't let me fit aftermarket tuners saying it would void the warranty.

Here in Kochi Showroom (Kerala) they were ready to do the tuning. Am not sure about the warranty. Coz my warranty period is already over. The service guy told me, if i buy the Fuel Pack they will do it for me. I ended up not doing as it was costing 45k+ here. so am running on stock air filter now.
 

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K&N claimed that their products are designed using factory ECU settings, so no need to tune.
 

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K&N claimed that their products are designed using factory ECU settings, so no need to tune.
I just put one on mine yesterday. I’m guessing you have a K&N on yours. How’s your experience been? I immediately noticed a lot better low end and better performance through the range.
 

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@Ogbob so I have a full V&H stage 1 on my Street Rod, I noticed that when running the FP3 tune with Hi-Output Slip-On and Stock Intake Filter the tune gave me much more power and lowered the number of backfire pops I had substantially, when I upgraded to the K&N high flow intake filter, coupled with the same exhaust and same exact tune map I am getting much more backfiring now. I am guessing I need to do a few sessions with the auto-tune feature to really fine-tune the AFR on the map and help eliminate the backfire.
 

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You might try using a map with the Hi-Output Slip-On and free flowing intake filter. That will probably solve most of your problems. If you aren't thoroughly pleased with such a map, then go to auto-tune.

That being said I didn't find a stock map for my TAB exhaust and K&N high flow filter. V&H would have been happy to tell me what to use, but I just guessed poorly and went straight to auto-tune after that.
 

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So update numero uno amigos!!

I ran two 30-40 minute auto-tune sessions yesterday evening and have noticed that the backfire pop has almost completely gone away.

Something to note, on my way home, I stopped and started the bike it was already up to temp by this point and my idle was low for some reason, upon starting the bike it was idling between 1100-1350 and just felt a little sluggish only at idle, this lasted about 5-7 seconds and then it went back up to what felt like normal operation. RPM at 1300-1500

Will take it out for a spin today and not do anything with FP3 just see how the ride and engine operation is.

So far so good as I think the idle issue was a one-off - will keep you all posted after my ride today.
 

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"Loose Nut" from Houston, Texas
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Sometimes it takes the ECU a few seconds to get a clean sensor reading. Just keep an eye on it.
 
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