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Author Topic: So, what if I don't want a new exhaust system? What am I loosing?  (Read 1306 times)

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Offline Starkman

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Greetings,

So, I bought my Bolt R a few days ago, and it's pretty much stock with the exception of some fork coverings. And at first, I thought, "Okay, new exhaust system—little more breathing room for leaning. But after riding it, I don't mind the stock system, but I'm wondering what I'd be loosing out on if I don't change it? As for the sound, I love it as it is and don't want it really loud and obnoxious—if I did change the exhaust, I'd want to keep as close to the same sound as possible.

One reason I guess I'd want to change the exhaust (at least I think I have this straight) is to clean up the jerky throttle. I wouldn't mind at all elminating that. But otherwise, what else, if anything, would I be missing out on if I don't change the exhaust? (UPDATE: I guess it's Ivan's Flash that corrects this, not the exaust system.)

For that matter, what other mods, if any, are considered necessary essentials which going without aren't advised or would rob you of more of what the bike can give?

As it stands, I will need to change the handle bars to accomdate my short arms, and a better seat is in the works as well.

Thanks.
« Last Edit: April 25, 2020, 07:23:31 pm by Starkman »


I test rode a Harley 1200 Sportster, but then I test rode the Bolt R Spec. Sold!

2015 Bolt R Spec, stock

Online DrM

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Re: So, what if I don't want a new exhaust system? What am I loosing?
« Reply #1 on: April 25, 2020, 08:14:19 pm »
Just my opinion, but you don't really have to change anything on the bike, unless something on it is just uncomfortable for you.  Different people have different tastes, and most of the mods don't have any real verified performance enhancements, and they are for the most part expensive to do.  So for mods, I'd recommend you wait a while, and put a lot of miles on the bike to see how you really like the bike before you start making mods to it.

The important mods (in my opinion) are for more comfort, such as moving the foot controls forward, or putting on high-rise bars.  But if you go beyond a couple of inches, then some cable or hose extensions may be desirable or even necessary.  And there are some riders who like the controls where they are.

Some supposedly power mods. like louder pipes or air intake systems and associated fuel flow mods such as Ivan's flash, are really not going to do much of anything for a mild rider except make more noise.   

Offline asarms87

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Re: So, what if I don't want a new exhaust system? What am I loosing?
« Reply #2 on: April 25, 2020, 09:05:10 pm »
Jerky throttle won't change with pipes, it is one of the benefits of Ivan's Flash though.

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Online srinath

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Re: So, what if I don't want a new exhaust system? What am I loosing?
« Reply #3 on: April 25, 2020, 09:13:15 pm »
I love the loudness and don't even want the burbly smooth loud - I'm a straight pipe loud guy - so I am definitely the outlier.

But 2 things I should say -
1. Loud pipes save lives - yes they may annoy the ocassional HOA prissy holier than thou prick, but on 2 significant occasions it saved me and someone else - from me.
Car about to turn left - what other kind right.
Me as rider - temporary BS road sign that was 3' across and 3' off the ground. I see the car waiting but he doesn't see me - but he does hear me - except I am on a frontage road - to my left is all of SC flying home on I26. And he moves a few feet and sees me and slams on the brakes - making an expression that told me - oh that was what that noise was. Yea windows down - this is SC.
Then ~10yrs ago, me as driver in a car about to turn left from side street - yea the usual. I look to my left and see what looks like a Jeep with twin round headlights far far away. I am hearing a motorcycle - I think its on my right, and I want to see it … oooo I look and see none - but by now the lot closer bike is literally in my face - and I go ….fuck that was a motorcycle close by - so did my passenger at that time.

2. The pipe and its carrier bracket are heavy as the dickens. Losing that helps just for that.

Besides uncorking the exhaust has a benefit of letting it run a higher rpm as much as that can in the context of that stupid intake.

Cool.
Srinath.

Offline Starkman

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Re: So, what if I don't want a new exhaust system? What am I loosing?
« Reply #4 on: April 25, 2020, 09:45:09 pm »
DrM,
Thanks for the input. Foot controls are fine for me as is, but I will need to put bars on that are extend towards me (short arms).

srynath,
Yeah, I don't mind pipe a bit louder for safety's sake, for sure. But I'm curious as to what you meant when you said, "Besides uncorking the exhaust has a benefit of letting it run a higher rpm as much as that can in the context of that stupid intake."

Here's where I'm lost. Why do I need to run higher rpms, and what's the problem (with regard to the rpms) with the stock intake? I happen to like the look of the intake, but are you saying it causes problems regarding rpms?

Thanks much.
« Last Edit: April 25, 2020, 09:57:44 pm by Starkman »
I test rode a Harley 1200 Sportster, but then I test rode the Bolt R Spec. Sold!

2015 Bolt R Spec, stock

Online srinath

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Re: So, what if I don't want a new exhaust system? What am I loosing?
« Reply #5 on: April 25, 2020, 10:52:02 pm »

srynath,
Yeah, I don't mind pipe a bit louder for safety's sake, for sure. But I'm curious as to what you meant when you said, "Besides uncorking the exhaust has a benefit of letting it run a higher rpm as much as that can in the context of that stupid intake."

Here's where I'm lost. Why do I need to run higher rpms, and what's the problem (with regard to the rpms) with the stock intake? I happen to like the look of the intake, but are you saying it causes problems regarding rpms?

Thanks much.

OK the biggest restriction in the flow of the air through this motor is that tight bend in the intake right by your left knee. That is what causes this thing to not rev up higher - from a air flow point of view.
We will never ever be able to change that. K&N and pipe do such a little around the edges.
Anyway lets get to the point besides that one.
If your intake lets you rev from say 2000 - 6000 in 6 seconds without the restriction of the current exhaust can and intake - take out the intake and fit a K&N, you'd rev that in maybe 5.5 sec. Take out the exhaust and fit a straight pipe and you get there in 5 sec.
With nothing else changed the pipe lets you gain that extra 1/2 sec and intake another 1/2 - and these numbers are all simply hypothetical.
Most of my experiments are on a GS500 not on this bike. On this one 300 miles is what I had before the pipe and the SCR crap all went in the box in favor of pipe and bolt seat and fender etc.

In any set gear a better flowing pipe and jetting to match would let you run through the revs a bit, maybe 10% faster, but if you row through the gearbox it may be as much as 20% faster.

Don't underestimate the power of wind and resistance from it. I was with the SCR bars barely able to break 110mph. I fit the C spec clip on's and it immediately jumps to 119 or so and may have had a wee bit left. Letting the exhaust breathe is also a way to shed heat from the motor, the hottest part is the exhaust gas, throwing it out as fast as you can in better for the motor too as long as the jetting is set to match its new flow.

Cool.
Srinath.

Offline Starkman

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Re: So, what if I don't want a new exhaust system? What am I loosing?
« Reply #6 on: April 25, 2020, 11:34:27 pm »
Okay, so different pipes and air intake help to get better rpms, performance. Not sure, though, what SCR or C spec clips are, but I'll get there!

Thanks very much for the explanation. So now I'm considering pipes and air!
I test rode a Harley 1200 Sportster, but then I test rode the Bolt R Spec. Sold!

2015 Bolt R Spec, stock

Online srinath

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Re: So, what if I don't want a new exhaust system? What am I loosing?
« Reply #7 on: April 26, 2020, 12:33:25 am »
SCR bars are wide as a barn door. And high too.
C spec bars are low and narrow. Helps you cut through the wind a lot better.

With a pipe or an intake or both - you instantly drop to the next limiting condition - the intake.
Remember you may only build rpm faster, not always gain total rpm - though pipe to slip on that top rpm is higher without the original pipe. I would guess the stock exhaust - both with its weight and its restriction cuts off atleast 500 rpm up top, but with the thing removed and a slip on in its place you're also gonna get that rpm top quicker. If that makes sense.

Cool.
Srinath.

Offline YAMAHAULER1

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Re: So, what if I don't want a new exhaust system? What am I loosing?
« Reply #8 on: April 26, 2020, 01:01:51 am »
If you like your stock exhaust keep it. Go to Ivan's website and view dyno charts and see that performance gains are with A/C change, little with exhaust. Stock exhaust + Hi flow A/C +( Ivan's Flash/ which eliminates that jerky throttle) = the best investment you can make.  Just look at all the positive reviews on here. Call him, he is a straight shooter.

Online lunkhead

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Re: So, what if I don't want a new exhaust system? What am I loosing?
« Reply #9 on: April 26, 2020, 05:16:22 am »
Starkman, if you want handlebars that are a bolt-on, the Reduced Reach Handlebars by Plot Inc. DBY-ACC56-13-11 is high quality and comes predrilled.

https://www.shopyamaha.com/product/details/reduced-reach-handlebars-by-plot
« Last Edit: April 26, 2020, 05:27:31 am by lunkhead »
C-SPƎC

Offline Sdaniels

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Re: So, what if I don't want a new exhaust system? What am I loosing?
« Reply #10 on: April 26, 2020, 08:56:38 am »
He says he wants a shorter reach to the handlebars...he aint going to like the C-spec clipons.
2015 C-spec

Offline kwlbrown

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Re: So, what if I don't want a new exhaust system? What am I loosing?
« Reply #11 on: April 26, 2020, 09:32:46 am »
Hey Starkman, I completely agree with DRM here, and you should ride the bike for a while and put a few thousand miles before you do any mods, what you may think you want now can easily change once you get  a feel for the bike. If you like the sound and looks of the stock pipe there is no need to change it, you won't be gaining anything from swapping it out other than cosmetic/audible changes.
buy the ticket, take the ride
- Dr. Hunter S Thompson

Online lunkhead

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Re: So, what if I don't want a new exhaust system? What am I loosing?
« Reply #12 on: April 26, 2020, 12:22:46 pm »
He says he wants a shorter reach to the handlebars...he aint going to like the C-spec clipons.

Not sure if you're replying to my post but we're not talking about the C-Spec or clip-ons. These are handlebars made specifically for the base model and R-Spec.

C-SPƎC

Offline Starkman

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Re: So, what if I don't want a new exhaust system? What am I loosing?
« Reply #13 on: April 26, 2020, 02:23:46 pm »
Lunkhead,

You said, "Not sure if you're replying to my post but we're not talking about the C-Spec or clip-ons. These are handlebars made specifically for the base model and R-Spec."
No, he was referring to a post by srinath. And thank you VERY much for the handlebar tip! That is the one mod I need to do immediately because it's just not comfortable riding with the stock bars. I need the shorter reach.


Yamahauler1,

YOu said, ". . . performance gains are with A/C change"
Gotcha, except I don't know what you mean by A/C. I searched this site and Ivan's. Didn't find anything. (I do know it doesn't stand for air conditioning!)
Further, I would like a sleeker, higher-sitting exhaust (and, apparently lighter in weight) than the stock, but I can hold out on that.

As for Ivan, yeah, I've seen nothing but positive reviews. Very glad about that. I'll call him tomorrow.
I test rode a Harley 1200 Sportster, but then I test rode the Bolt R Spec. Sold!

2015 Bolt R Spec, stock

Offline Sdaniels

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Re: So, what if I don't want a new exhaust system? What am I loosing?
« Reply #14 on: April 26, 2020, 03:24:57 pm »
He says he wants a shorter reach to the handlebars...he aint going to like the C-spec clipons.

Not sure if you're replying to my post but we're not talking about the C-Spec or clip-ons. These are handlebars made specifically for the base model and R-Spec.



I wasn't...should have shared Srinath's post.

The exhaust was the first thing I new was going to be changed, especially when I heard (or barely heard) the bike running.  I don't think I've ever heard a quieter stock bike in my life.  It helped to drill it out using a 1 1/2" hole saw but it still isn't anywhere near the decibels most aftermarkets put out.  It's also something I've never not changed on every bike ever owned.  To be 100% honest, an aftermarket exhaust, Ivan's flash & the K&N intake didn't change much in the way of output that I could feel in seat of the pants.  That's not a complaint, just being straight up.  Anytime a bike loses weight it's a good thing.  Stock exhaust is about 16lb.  Weight savings will depend on which exhaust you get...Danmoto is a little over 5lb so 10-11 lbs loss is good but I lost more with the rear fender removed...12lb 13oz. 
2015 C-spec