Welcome to the Yamaha Star Bolt Motorcycle Forum

Why join our motorcycle community?

  • Membership is free and easy
  • Get technical support and information for your Yamaha Star Bolt motorcycle or search for information before buying
  • Use the member map to find riders near you
  • Participate in our monthly virtual bike show (or at least vote)
  • Get rid of these annoying boxes asking you to register  ;D

More importantly, make new friends!!

Author Topic: So, what if I don't want a new exhaust system? What am I loosing?  (Read 1294 times)

0 Members and 1 Guest are viewing this topic.

Offline srinath

  • Hero Member
  • *****
  • Posts: 708
Re: So, what if I don't want a new exhaust system? What am I loosing?
« Reply #30 on: April 27, 2020, 08:55:47 am »
The jerky throttle is pretty much there, maybe Ivan flash will fix that - but the other hting  Ivan's flash is supposed to "fix" those hit the wall engine braking when you shut throttle - that I am absolutely sure I dont want. Hence unflashed.

The second thing is - the stock can and bracket that carries it are both tossed in the trash, my can is super super light and slips onto the header right after the O2 sensor. I have it cheesily mounted onto the loop by the foot peg with chicken wire - at some point I'll make a better brakcet. Lots of weight gone, as well as the whole SCR rear hoop and what not.

Cool.
Srinath.

Offline DrM

  • Full Member
  • ***
  • Posts: 129
Re: So, what if I don't want a new exhaust system? What am I loosing?
« Reply #31 on: April 27, 2020, 10:46:27 am »

@ Sdaniels: You making up your own facts?  So far I've only heard you complain about "jerky" throttle.  Haven't heard from the other 99% you claim.

Well four people acknowledged it within a couple of hours of your post, so there is that.  Ninety-nine percent is an obvious exaggeration but did you really expect everybody to respond immediately to the claim?  A search will verify the jerkiness.
A perfect example of psychobabble -- How one tends to justify what he (or she) may believe, regardless of any facts or opinion to the contrary. 
You are entitled to your opinion, but four people agreeing with doesn't make it a fact.  Maybe you could start a religion over it, though.

Offline kwlbrown

  • Full Member
  • ***
  • Posts: 187
Re: So, what if I don't want a new exhaust system? What am I loosing?
« Reply #32 on: April 27, 2020, 11:47:02 am »
Jerky throttle isn't a bolt specific issue either, it seems to be on all bike forums that I have perused. It also seems to vary from bike to bike whereas some people will not really notice it but the same model a different rider finds it borderline unridable. It is a result of the manufacturers need to comply with tighter emission requirements. The ecu flash sorts it all out anyways, and if you are not interested in flashing the ecu there is a product called  booster plug that is also a solution.
buy the ticket, take the ride
- Dr. Hunter S Thompson

  • Advertisement

Offline Sdaniels

  • Full Member
  • ***
  • Posts: 213
Re: So, what if I don't want a new exhaust system? What am I loosing?
« Reply #33 on: April 27, 2020, 12:34:13 pm »

@ Sdaniels: You making up your own facts?  So far I've only heard you complain about "jerky" throttle.  Haven't heard from the other 99% you claim.

Well four people acknowledged it within a couple of hours of your post, so there is that.  Ninety-nine percent is an obvious exaggeration but did you really expect everybody to respond immediately to the claim?  A search will verify the jerkiness.
A perfect example of psychobabble -- How one tends to justify what he (or she) may believe, regardless of any facts or opinion to the contrary. 
You are entitled to your opinion, but four people agreeing with doesn't make it a fact.  Maybe you could start a religion over it, though.

I don't know who pissed in your corn flakes but you need to drop this.  Four people stating something exists with your single opinion it doesn't?  You seem to think you're some sort of god over all things motorcycle related.  Get over yourself.  Respond if you must but I'm done giving you the time of day.
« Last Edit: April 27, 2020, 12:36:33 pm by Sdaniels »
2015 C-spec

Offline DrM

  • Full Member
  • ***
  • Posts: 129
Re: So, what if I don't want a new exhaust system? What am I loosing?
« Reply #34 on: April 27, 2020, 01:21:20 pm »
Jerky throttle isn't a bolt specific issue either, it seems to be on all bike forums that I have perused. It also seems to vary from bike to bike whereas some people will not really notice it but the same model a different rider finds it borderline unridable. It is a result of the manufacturers need to comply with tighter emission requirements. The ecu flash sorts it all out anyways, and if you are not interested in flashing the ecu there is a product called  booster plug that is also a solution.
Being that I am an engineer, and wanting a motorcycle that would "bolt" extra lively from the starting gate, I would design the throttle just like Yamaha did for it's Bolt - with a short throw from fully open to fully closed, and have very little to no slack (also known as "play") in it.  If you allow a lot of slack in the throttle control, then it will for certain feel jerky.  But the solution is to adjust the slack out of it. Anyway I like the throttle the way it is designed, and I adjust the slack out of it whenever needed.

Offline kwlbrown

  • Full Member
  • ***
  • Posts: 187
Re: So, what if I don't want a new exhaust system? What am I loosing?
« Reply #35 on: April 27, 2020, 01:26:13 pm »
I never had a problem with my throttle either, but some people do experience a snatchy, on-off feel and like I mentioned previously it seems it can vary from bike to bike and brand to brand. I believe the issue is not being a strong bolting feel from take off but a jerky on off feel when cornering or low speed maneuvers.
« Last Edit: April 27, 2020, 01:28:09 pm by kwlbrown »
buy the ticket, take the ride
- Dr. Hunter S Thompson

Offline srinath

  • Hero Member
  • *****
  • Posts: 708
Re: So, what if I don't want a new exhaust system? What am I loosing?
« Reply #36 on: April 27, 2020, 02:10:18 pm »
I've had the on/off situation in carbed bikes and I have always managed to fix it - usually by looking in the manual for what the non epa countries are jetted to and obtaining those parts and swapping em and usually ended up succesful.
The Bolt - well I would re-flash with Ivan - but that shut throttle engine braking - I cant give up. Else that jerky throttle will ahve been history. I have 1/2 a mind to experiment with crap like fuel orifices etc etc - which I never have opened up to even understand.
I wonder if a 2004-08 GSXR fuel injector set - like those nissan 240sx guys fit would help. LOL.
Cool.
Srinath.

Offline Starkman

  • Newbie
  • *
  • Posts: 32
Re: So, what if I don't want a new exhaust system? What am I loosing?
« Reply #37 on: April 27, 2020, 02:15:11 pm »
ShakerNorm,
Thanks for responding!
If you look at Ivan's charts, you'll see that there are NO Exhaust systems that are really much of an improvement over the stock exhaust.
Yeah, I'm not after performance by changing the exhaust. A sleeker look and a bit lighter weight are my targets. And no, I happen to like the stock intake. My concern is that after a flash would I want something on their to let more air in. Otherwise, hek, it's fine with me.

srinath,
The second thing is - the stock can and bracket that carries it are both tossed in the trash, my can is super super light and slips onto the header right after the O2 sensor.
I'm sorry, but I don't yet follow the jargon. I don't know what a 'can' and 'bracket' here are. Gotta dumb it down for me the time being!
Oh, and I too enjoy the Bolt's stock engine braking, very much. That's a big thing now to consider regarding a Flash. Thanks for mentioning it.

DrM,
Can you toss a Website or something my way as to how to adjust the throttle slack? Thanks.

Thanks.
« Last Edit: April 27, 2020, 02:16:45 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

Offline Crilly Wizard

  • Jr. Member
  • **
  • Posts: 77
Re: So, what if I don't want a new exhaust system? What am I loosing?
« Reply #38 on: April 27, 2020, 02:46:47 pm »
There is an adjuster and locking ring on one of the throttle cables at the lever. Always leave a mm or 3 from full right though. Idle should be adjusted with the throttle bodies, not artificially increased by tight throttle cables.

Offline DrM

  • Full Member
  • ***
  • Posts: 129
Re: So, what if I don't want a new exhaust system? What am I loosing?
« Reply #39 on: April 27, 2020, 03:19:24 pm »

DrM,
Can you toss a Website or something my way as to how to adjust the throttle slack? Thanks.

Thanks.

In my 2019 owner's manual, the subject is "Checking the throttle free play" on page 7-15.  In the 2014 owner's manual, it is on page 6-13.  If your model year is different, it's manual may have it on a different page, but the Blot model hasn't changed much (if any) over the years.  What both the 2014 and 2019 manuals say is that if the free play is less than 4mm (0.16") or more than 6mm (0.24"), take it to a Yamaha dealer to have it adjusted.

If you are going to hire a mechanic for all your work, then that is sufficient, but if you contemplate doing some work yourself, then you probably want a service manual. I have a digital copy of a 2017-2018 service manual, which should suffice. I may have downloaded it from this site.  So this is what it says:

CHECKING THE THROTTLE GRIP OPERATION ....... .......... ......... ....... 3-25

CHECKING THE THROTTLE GRIP
OPERATION
1. Check:
Throttle cables
Damage/deterioration ~ Replace.
Throttle cable installation
Incorrect ~ Reinstall the throttle cables.
Refer to "HANDLEBAR" on page 4-47.
2. Check:
Throttle grip movement
Rough movement~ Lubricate or replace the
defective part(s).
TIP ~~~~~~~~~~~~~~
With the engine stopped, turn the throttle grip
slowly and release it. Make sure that the throttle
grip turns smoothly and returns properly when
released.
Repeat this check with the handlebar turned all
the way to the left and right.
3. Measure:
Throttle grip free play "a"
Out of specification ~ Adjust.
Throttle grip free play
4.0-6.0 mm (0.16-0.24 in)

4. Remove:
Fuel tank
Refer to "FUEL TANK" on page 6-1 .

5. Adjust:
Throttle grip free play
TIP ~~~~~~~~~~~~~~~~
Prior to adjusting the throttle grip free play, throttle
body synchronization should be adjusted
properly.
TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT

Throttle body side
a. Loosen the locknut "1" on the accelerator cable.
b. Turn the adjusting nut "2" in direction "a" or "b"
until the specified throttle grip free play is obtained.
Direction "a"
Throttle grip free play is increased.
Direction "b"
Throttle grip free play is decreased.
c. Tighten the locknut.

TIP ~~~~~~~~~~~~~~
If the specified throttle grip free play cannot be
obtained on the throttle body side of the cable,
use the adjusting nut on the handlebar side.
TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT

Handlebar side
a. Loosen the locknut "1" .
b. Turn the adjusting nut "2" indirection "a" or "b"
until the specified throttle grip free play is obtained.
Direction "a"
Throttle grip free play is increased.
Direction "b"
Throttle grip free play is decreased.
c. Tighten the locknut.
1
2


EAS31575
LUBRICATING THE THROTTLE GRIP
HOUSING AND CABLE
Lubricate the throttle grip housing and cable.
Recommended lubricant
I Lithium-soap-based grease
 

Offline Starkman

  • Newbie
  • *
  • Posts: 32
Re: So, what if I don't want a new exhaust system? What am I loosing?
« Reply #40 on: April 27, 2020, 03:23:42 pm »
Thanks much, DrM.

Yeah, I am so not mechanically inclined I'd have to take it in to be adjusted. I'd like to learn as much maintenance as possible, but I really need to be with someone experienced to watch and learn that way.

Thanks again!

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

2015 Bolt R Spec, stock

Offline srinath

  • Hero Member
  • *****
  • Posts: 708
Re: So, what if I don't want a new exhaust system? What am I loosing?
« Reply #41 on: April 27, 2020, 07:15:08 pm »
I installed this can - weighs less than 2lb, and I lose the can and bracket -

https://www.ebay.com/itm/38-51mm-Steel-Motorcycle-Exhaust-Muffler-Pipe-Tips-Slip-on-Street-Bike-Universal/162172616559?epid=23004898249&hash=item25c23dbf6f:g:uDEAAOSw4axbkN2S

Its hard edged and really sounds like an AK47 but I love it. Loud pipes save lives - even from me.

I've been jetting crap since the stone age. This bike has the classic epa jetting flaw - just a shade lean just up from idle.
I suspect its rich every where else. Not much, but just a shade up from where it delivers the best punch.
My solution, is to vroom vroom it, and be in 1 gear lower than where it can get into the lean patch.
If that fails, burn a little more clutch, so far clutch is fine with 9k on it, don't believe its been hurt 1 bit.

I cant explain it, but 9K of riding, I don't thin I'll ever Ivan flash it, I am happier by revving it and running 1 gear down at most speeds below 50 or so.

Cool.
Srinath.
« Last Edit: April 27, 2020, 07:21:03 pm by srinath »

Offline Starkman

  • Newbie
  • *
  • Posts: 32
Re: So, what if I don't want a new exhaust system? What am I loosing?
« Reply #42 on: April 27, 2020, 08:35:06 pm »
As I say, srinath, roll on, man, roll on!

I really do enjoy the strong engine braking. Really nice. The jerkiness is only an issue under certain circumstances, but I am getting used to it. I have to take into account that this is all new to me. Otherwise, I'm feeling very good overall about the bike as it is.

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

2015 Bolt R Spec, stock

Offline Sdaniels

  • Full Member
  • ***
  • Posts: 213
Re: So, what if I don't want a new exhaust system? What am I loosing?
« Reply #43 on: April 28, 2020, 10:20:12 am »
Keep in mind, even after Ivans flash, there is still engine braking...it's just consistent, same amount of engine braking all the way down to idle...no more braking down to a certain rpm that then ramps up harder.  That's all ecu controlled & has nothing to do with the throttle cable adjustments...not to say that those don't factor into the equation.  User throttle control still counts.
2015 C-spec

Offline Starkman

  • Newbie
  • *
  • Posts: 32
Re: So, what if I don't want a new exhaust system? What am I loosing?
« Reply #44 on: April 28, 2020, 10:57:11 am »
Keep in mind, even after Ivans flash, there is still engine braking...it's just consistent, same amount of engine braking all the way down to idle...no more braking down to a certain rpm that then ramps up harder.  That's all ecu controlled & has nothing to do with the throttle cable adjustments...not to say that those don't factor into the equation.  User throttle control still counts.

Definitely.

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

2015 Bolt R Spec, stock