The more you stay stock, the better you will enjoy your bike. What will be discussed here is basic air speed changes to tuning. That is all we care about with a high performance 'tuneup.' There are guys/gals that 'Tune" their bike with cams, advancers, porting, stroking, and other forms of increasing the speed into the cylinder.
This write is more for the light weight tuner uppers like myself that do not need that much work, being I am not in race competition that deep. We are just trying to both tune the bike so it is quicker and also smoother. This is just a mild street bike anyone can ride... Especially the first year bike.
Here are a few ways the factories play with air speed. Once design, you can take that air coming in and close the air that enters the air cleaner side of the engine. So, there is all this air waiting to be sucked in, but only a swinging door gates the air [before the air cleaner]. See the positioning of the air assist between designs? Say another approach to the same air speed can be slowed by a device that is on the other side of the air cleaner. We know this as the: Subthrottle/secondaries/flies.
There are other air doors inside exhaust systems too. These are found on some of the other brands of the, "Big4." Interesting stuff to play with, but for here, we will stay with the one design the 14 uses for air slowing; are the subthrottle plates. Once you have that comfortable feel of the 14 and that power, you sort of settle inn to that new speed your older bike never had! So, here you are sleeping at the switch you are craving more out of the bike.
Personally, I feel the slower the subthrottle, the more you have all that power under you is that slower linear feel; feels like a huge wave coming to shore but slow as hell! You get this ripping current coming up, but it is missing something like the fast forward button is not there. Like the other bikes with the, A-B-Chew feel that wave change?... It is all that matching of the air doors opening and exhaust matching signals: Set the air speed to enter sooner is all that the buttons do.
For you to have that same gate changing effect on the 14, you have no handle bar switch option but to physically remove/move the way the air enters the cylinder. There are 4-ways you can have that air under your control is to look around here for it in another thread. Might be in the How-To section. Rather than rehash what has been said [there], this is more for the 'WHY' we alter the flow is simply to: Make the air intake event happen sooner. That is your basic fundamental tuning philosophy.
Again, for me, I want to remain as stock as possible. I am looking at the raw data of the bike and know going in, I want to remove as many restriction devices as possible, but remain stock, as in: All emissions working. Why? Because they are tuning tools believe it or not. Remember, we want to have more air speed going in that cylinder. Well, for every reaction there is that exhaust that is going to happen along with other strokes involved with their reactions/actions. The stock exhaust happens to restrict the air you tried to move in faster. So, there is more to air speed on one side of the fence as there is to the other that that reaction.
Back to gaining air speed... We have a few tricks that will help out; being both a bump in speed and a bump is smoothness. This can be obtained by removing the stock OEM steel screen. Remember, I am not using a piggy fuel device for these two mods. This is raw data to refined data being we are chasing tune > up to a lean point. We are not making huge air changes that need an extra [fuel] tuning device to match the minor air speed changes we've made. These are very subtle changes as if you raised the idle by screw [being the air cleaner will raise the rpm a little if any. Is if you raised the idle, did not the bike know that too? If you WOT the throttle sitting idle in neutral and you now grab a hand full, did not the engine rip right up there as fast as you could move the throttle?
The reason we can work the parts off the bike is because there is not enough air speed to cause any type of lean damage >> If you know how to ride a highly tuned performance production bike like the docile 14. A screen removal and a subthrottle removal are two basic air restrictors. These are the first to go if, 'The Tuneup' is about to occur.
If you are under warranty, you do not want to jeopardize that agreement. So, you have to make a decision to that contract. The mods stated here will cause your warranty to be void. So, do not to upset your dealer [knowing you altered the bike] with that agreement over your head. It is not his fault you modded up and now expect your bike to be repaired caused by your mods. Say a more breathable air cleaner could not seal as well as the OEM and now you cry foul,(plugs)? See what I mean?
Back to our speed tuning or tuneup, more or less. I took a loop with #4-Mod of the throttle body subs, (photo found on this forum). I then removed the safety wire and reinstalled the choke system. I then rolled the throttle with the subsystem in play. I have an '08 and I am here to tell you; if you want the tuneup, then raw data to refinedata says no sub no way is no how about that!..... PERIOD!
We are not that involved with any sort of hot rod project in this thread. This is more for the rider that wants the performance tune that gets her done without all the money and fuss that begins to weaken the integrity of the base you stared with. For this thread, we just want to stick with the mods that stop short of pulling off the valve cover or splitting the cases. This is more the raw data you just rode out of the dealership and took your first spin on your 14. Few hundred miles later, you have the idiosyncrazy of the bike figured out, what to expect when you give it a slight boost to see what you own.
If you want more tune out of a stock bike, then the two quickest mods are the air cleaner screen and flies removed. Did you want even more tuneup? Then the next step is an exhaust system, advance movers and piggyback fuel cutters that are out there. OK, this is going to be a can of worms about to spill over. We have yet to mention the hack 'toning' or PAIR preparation.
Lets break this down as two tuning ranges:
A. We pull the OEM A/C element, remove the steel screen for smoothing purposes.
B. We remove the subthrottle for faster air movement which gives all around peak performance from idle to red line. No other mods needed here.
Down range, we can keep tuning the air speed and now bring in more TNT or a different fuel. Have an even faster event with cams opening sooner, etc. We can add more condensed air (NOS) as a helper with the fuel piggy. But here, we have yet to remove any internals inside the engine. We would almost need the list down below to help with the changing internal parts; that is if you were to keep stepping up the tune buy adding cams, porting, and the like.
Your 2nd tuning stage would look more or less is to add:
1. Fuel piggy devices.
2. Exhaust systems.
3. Freer flowing air cleaner elements.
4. Porting.
5. Cam swap.
6. Compression changes for proper applications, i.e., pistons, head gasket thicknesses.
7. Outside fuel (piggy) adders like NOS/water-alcohol injection/nitro base fuels/other exotic fuels.
8. Bottom end builders like rod replacement.
9. 1Atmo Hacks in the computer is use the 'redundant' mapping like the GPS signal.
10. Swing arm extensions to bring the HP to the rear wheel and not thru the shock spring; as in a squat loss is that now returned to the rear wheel.
11. Weight removal that increases HP so as not to move a lead ball and all that is theory.
12. Emission helpers [removed]*
*Most on the list stated above are for closed course purposes only and do not apply to to street standards. You sort a see how much it costs to move faster? Well, with a bike like this, you do not need much to make it a touch faster is unlock the air travel.