Author Topic: Exhaust pressure  (Read 4089 times)

Offline troy_s

  • Jr. Member
  • **
  • Posts: 92
  • Thanked: 18 times
  • ST Legend
Exhaust pressure
« on: May 29, 2016, 09:19:07 AM »
Morning all,
 My mechanical knowledge is close to not much. Don't ask me how I first discovered this, but i have noticed that if you hold your hands over each exhaust outlet there is considerably less force of the exhaust from the right side compared with the left.

 Is this something I need to be concerned about, and if so, how concerned?

cheers
Troy
 
The following users thanked this post: Jglan10 (Onesie)

Offline Sicman

  • RTE Coordinator
  • Supreme "2000" Club Member
  • *
  • Posts: 2988
  • Thanked: 602 times
  • Was here when the lights got turned on :-)
Re: Exhaust pressure
« Reply #1 on: May 29, 2016, 09:20:45 AM »
Stimpy - Back pressure is your area of expertise  :whistle :grin
Cheers
Tony
FarRider 802
NatRally's - 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 202🤬, 2🤬21, 2021/22 Black Dog bit me, 2023, 2024
Experience trumps assumption :-)
 

Offline Tipsy

  • Landed Gentry
  • Legendary "1000 Club" Member
  • *****
  • Posts: 1343
  • Thanked: 51 times
  • Laurie
Re: Exhaust pressure
« Reply #2 on: May 29, 2016, 09:27:20 AM »
I dont know about Stimpy but my back pressure releases quite readily.... :H :rofl :hatwave

Tipsy
I am lost and haves gone to find myself
Now If I get back before I return
Please ask me to wait.
 

Offline Jglan10 (Onesie)

  • Jordan
  • Sr. Member
  • ****
  • Posts: 285
  • Thanked: 69 times
  • Love the real bikes
Re: Exhaust pressure
« Reply #3 on: May 29, 2016, 11:51:58 AM »
Morning all,
 My mechanical knowledge is close to not much. Don't ask me how I first discovered this, but i have noticed that if you hold your hands over each exhaust outlet there is considerably less force of the exhaust from the right side compared with the left.

 Is this something I need to be concerned about, and if so, how concerned?

cheers
Troy
yay your alive
Honda cb 250n 2001 honda cb 400 super for hyper revo spec 3 2011 honda st 1100 ps 1995 Honda cb 250 98 and another st1100 94 and another st1100 97 and 2 tralers
 

Offline Abe

  • Legendary "1000 Club" Member
  • *****
  • Posts: 1797
  • Thanked: 178 times
  • 4D Gang Member
Re: Exhaust pressure
« Reply #4 on: May 29, 2016, 12:49:03 PM »
Troy do you feel that there is less pressure coming out of the offside (right side sitting on the bike) exhaust ??

If so, check the exhaust clamp near the foot pegs are tight, as they loosen them and roll the muffler out of the way when fitting a tyre.

At my age " getting lucky" is remembering what I came in the room for ;)

:wht13      Cheers Dave
Member of the 4 D Gang
 
The following users thanked this post: ST2UP

Offline HunterTodd

  • Sr. Member
  • ****
  • Posts: 369
  • Thanked: 36 times
  • HunterTodd
Re: Exhaust pressure
« Reply #5 on: May 29, 2016, 05:33:38 PM »
From memory the two sides are interconnected so it probably doesn't mean a lot.
 

Offline Gadget

  • UNBELIEVABLE "5000 Posts" Member
  • ****
  • Posts: 5614
  • Thanked: 2141 times
  • Just Ridin'
Re: Exhaust pressure
« Reply #6 on: May 29, 2016, 05:35:12 PM »
From memory the two sides are interconnected so it probably doesn't mean a lot.
I thought so too. I believe it is done to keep suitable back pressure on every cylinder.

Sent from my GT-N5110 using Tapatalk

Cheers,
Gary
_________________________________________________________________________________________________________
Then  :blu13 Now :Spyder
Life's too short to be miserable, so enjoy it! :)
OzSTOC #257
FarRider #810
IBA #59140

Mob: 04 2448 3555
 

Offline basadia

  • Full Member
  • ***
  • Posts: 153
  • Thanked: 12 times
  • ST Legend
Re: Exhaust pressure
« Reply #7 on: August 08, 2016, 03:46:57 PM »
Maybe your bike needs a carb vacuum balance, if the two left cylinders are sucking more air the right side bank maybe the exhaust balance is off.
Keith
05 ST1300
 

Offline troy_s

  • Jr. Member
  • **
  • Posts: 92
  • Thanked: 18 times
  • ST Legend
Re: Exhaust pressure
« Reply #8 on: August 08, 2016, 04:05:22 PM »
Not being particularly mechanically minded, mine is fuel injected. Does this have a bearing on your suggestion?

cheers
Troy
 

Online Brock

  • Tardis Tech
  • UNBELIEVABLE "5000 Posts" Member
  • ****
  • Posts: 8793
  • Thanked: 1763 times
  • White is the fastest
Re: Exhaust pressure
« Reply #9 on: August 08, 2016, 05:37:05 PM »
Quote
Does this have a bearing on your suggestion?

Yep, no carbs
Brock
Asian Correspondent
2003 Honda ST1100PY



Ulysses #32829
STOC #8239
OzSToc # ??
Kinross WA
 

Offline basadia

  • Full Member
  • ***
  • Posts: 153
  • Thanked: 12 times
  • ST Legend
Re: Exhaust pressure
« Reply #10 on: August 09, 2016, 07:29:31 AM »
Yep no carb but a vacuum balance to the throttle bodies always helps make your bike run better and may be contributing to the exhaust imbalance.
Not sure if there is a cross over in the final section of the exhaust, if there is it might be a restriction in the right side muffler causing the problem as the exhaust gasses will find the least resistance to escape.
Keith
05 ST1300
 

Offline STroppy

  • STroppy (Terry - the name on the TeeShirt)
  • RTE Coordinator
  • Legendary "1000 Club" Member
  • *
  • Posts: 1884
  • Thanked: 751 times
  • CountryMember! Mob 0412499625
Re: Exhaust pressure
« Reply #11 on: August 09, 2016, 06:48:35 PM »
I dont know about Stimpy but my back pressure releases quite readily.... :H :rofl :hatwave

Tipsy

Way too much information . . . . .
Terry, Canberra 0412499625
Ulysses #22354,
Current bikes 2013 Triumph Trophy SE, 2008 ST1300, BMW F700GS
Previous bikes1948 Triumph Tiger 500 Twin - sprung rear hub, 1963 BSA Bantam 175, Yamaha 75cc & DT250, Honda ST1100, 400N & CX500 sports, BMW K100RS & K100 LT, Harley Electra-glid
 

Offline Cerebral Knievel

  • Supreme "2000" Club Member
  • *****
  • Posts: 2565
  • Thanked: 896 times
  • The last of the 4 D's
Re: Exhaust pressure
« Reply #12 on: August 10, 2016, 10:19:37 PM »
I dont know about Stimpy but my back pressure releases quite readily.... :H :rofl :hatwave

Tipsy

Way too much information . . . . .

STroppy knows all too well about my back pressure.
After spending 24hrs in the same small car together i'm sure Tipsy knows all about it too.... :'(
2003  :slvr13  2005  :blu13  1999 :gldst11                                           
               2008  :blk13 1996  :blk11

National Rallies 2013 2014 2015 2016 2017 2018 2019 2022 2023 2024

Current Fleet:08 ST1300,05 R1200RT(busted sump)
 

Offline Tipsy

  • Landed Gentry
  • Legendary "1000 Club" Member
  • *****
  • Posts: 1343
  • Thanked: 51 times
  • Laurie
Re: Exhaust pressure
« Reply #13 on: August 11, 2016, 10:29:14 AM »
 :p :crackup :rofl :wink1 :wink1 :whistle :fp :butt

Tipsy
I am lost and haves gone to find myself
Now If I get back before I return
Please ask me to wait.
 
The following users thanked this post: Shiney