Author Topic: Odd sounding number 1 exhaust  (Read 474 times)

Offline paulbaker1954

  • SOHC Pro
  • Posts: 696
  • I'll just be 5 minutes dear!!
    • View Profile
Odd sounding number 1 exhaust
« on: April 18, 2018, 06:57:03 PM »
Hi
My number 1 exhaust is making not the usual sound after the winter lay up
It sounds a bit like a boom boom noise and if you hold your hand over the end of the pipe it feels as if the pressure is higher than the othe 3 cylinders

Not sure if I need to worry as the bike runs fine other than that and pulls well through rev range just this odd noise at tick over

Any ideas ?

I guess I could post a vid on you tube if needed but not at home at the mo
If you think there's light at the end of the tunnel it's usually another train !!

2016 Yamaha MT09 Tracer
1971 Honda CB500 Four K0

Offline Johnwebley

  • SOHC Jedi
  • Posts: 3204
    • View Profile
Re: Odd sounding number 1 exhaust
« Reply #1 on: April 18, 2018, 08:07:54 PM »


   is the rubber tube link OK?

  not leaking
lifelong motorcycle rider,and fan

Offline hairygit

  • SOHC Jedi
  • Posts: 2708
    • View Profile
Re: Odd sounding number 1 exhaust
« Reply #2 on: April 18, 2018, 08:17:30 PM »
Internal baffling breaking up or rusted loose? Less baffling equals less restrictive path for exhaust gases, therefore would have more pressure at tail end.
If it's got tits or wheels, it's hassle, if it's got both, RUN!!!

Offline Trigger

  • Grogu
  • *
  • Posts: 8434
  • Engines built on reputation, not advertising.
    • View Profile
Re: Odd sounding number 1 exhaust
« Reply #3 on: April 18, 2018, 08:24:30 PM »
Had a rattle from the inner down pipe that rusted at the top once. Took yonks to find that problem ;)

Offline paulbaker1954

  • SOHC Pro
  • Posts: 696
  • I'll just be 5 minutes dear!!
    • View Profile
Re: Odd sounding number 1 exhaust
« Reply #4 on: April 18, 2018, 10:46:03 PM »
Internal baffling breaking up or rusted loose? Less baffling equals less restrictive path for exhaust gases, therefore would have more pressure at tail end.

Interesting but these are only 2 year old CMSNL pipes
If you think there's light at the end of the tunnel it's usually another train !!

2016 Yamaha MT09 Tracer
1971 Honda CB500 Four K0

Offline hairygit

  • SOHC Jedi
  • Posts: 2708
    • View Profile
Re: Odd sounding number 1 exhaust
« Reply #5 on: April 19, 2018, 05:52:23 AM »
The original Honda made ones they came with new, some were having to be replaced under warranty in less than 6 months as they rotted so quickly, so don't ever assume that a fairly new or even brand new part cannot be at fault!

Sent from my X6pro using Tapatalk

If it's got tits or wheels, it's hassle, if it's got both, RUN!!!

Offline paulbaker1954

  • SOHC Pro
  • Posts: 696
  • I'll just be 5 minutes dear!!
    • View Profile
Re: Odd sounding number 1 exhaust
« Reply #6 on: April 19, 2018, 07:23:03 AM »
The original Honda made ones they came with new, some were having to be replaced under warranty in less than 6 months as they rotted so quickly, so don't ever assume that a fairly new or even brand new part cannot be at fault!

Sent from my X6pro using Tapatalk

Dumb ? but is there a way to check/test these DS/CMS Pipes as I don’t think the baffles are removable
If you think there's light at the end of the tunnel it's usually another train !!

2016 Yamaha MT09 Tracer
1971 Honda CB500 Four K0

Offline Bryanj

  • Grogu
  • *
  • Posts: 10695
    • View Profile
Re: Odd sounding number 1 exhaust
« Reply #7 on: April 19, 2018, 07:29:12 AM »
Tap gentlyish with soft objet to see if it rattles

 

SimplePortal 2.3.5 © 2008-2012, SimplePortal