Uneven Pressure/Sound in Exhausts |
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umairkhan
Falcone Joined: 23 Mar 2020 Location: UAE Status: Offline Points: 23 |
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Posted: 13 Oct 2020 at 19:44 |
Hi folks,
I am facing this odd issue with my 2019 V9 Bobber, when i accelerate only left exhausts is working and the right one is pretty silent. It feels like the air pressure is not equally distributed. At low revs and idle stage both exhaust are pretty much at same sound level. i am not sure if its relevant but i have received engine alerts in past which pointed to secondary air intake malfunctioning, agency kept resetting those errors and they go away only to come back again few days later. Agency has told me that i can ignore those alerts but i think there is a bigger issue which they are overlooking. any thoughts on the non-matching exhaust sounds? i can easily tell the difference because i have Zard exhaust and they are pretty loud.
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Brian UK
Moderator Group Joined: 13 May 2014 Location: Surrey Status: Offline Points: 17641 |
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Do you still have normal accelleration?
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Brian.
Better 5 minutes late in this world than years early in the next. |
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umairkhan
Falcone Joined: 23 Mar 2020 Location: UAE Status: Offline Points: 23 |
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Yes, acceleration is fine.
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Brian UK
Moderator Group Joined: 13 May 2014 Location: Surrey Status: Offline Points: 17641 |
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You haven't got baffles in one and not the other?
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Brian.
Better 5 minutes late in this world than years early in the next. |
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Tony G
Senior Member Joined: 02 Aug 2020 Location: CO Durham Status: Offline Points: 375 |
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As it's a modern bike, has it got a diagnostic socket, like on a car?
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I'll get their soon
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rbt1548
Senior Member Joined: 19 Nov 2014 Location: Glasgow Status: Offline Points: 1241 |
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I have just looked at a diagram for your bike's exhaust system, it has an equaliser pipe running between the two exhaust pipes below the engine, this should negate any discrepancy in pressure, could it possibly be blocked. It looks fairly simple to remove and check.
Might be worth a try. Apologies, I have just noticed you have a Zard system, however if it's two silencers you have and retained original exhaust pipes the above should still apply.
Edited by rbt1548 - 15 Oct 2020 at 11:47 |
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1975 Honda CB750 K5
1958 Wife It wisnae me, a big boy done it and ran away! "I was so much older then; I'm younger than that now!" |
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Brian UK
Moderator Group Joined: 13 May 2014 Location: Surrey Status: Offline Points: 17641 |
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Does the Zard exhaust have removable baffles? Any difference there would certainly make a difference to the noise coming out the end, but would probably not affect performance. Indeed there could be a fault in one which causes this anomily. Diagnostics are possible, but would be of no help here as there is no fault indication.
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Brian.
Better 5 minutes late in this world than years early in the next. |
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Mike H
Senior Member Joined: 21 May 2014 Location: East Anglia Status: Offline Points: 8733 |
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One ear is more sensitive than the other? Seriously I have a mismatch and the louder the noise or whatever the more the 'bad' ear shuts down. |
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"Chicken nuggets don't dance on a Tuesday."
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umairkhan
Falcone Joined: 23 Mar 2020 Location: UAE Status: Offline Points: 23 |
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both baffles are out
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umairkhan
Falcone Joined: 23 Mar 2020 Location: UAE Status: Offline Points: 23 |
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thanks this is helpful and reassuring..
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Brian UK
Moderator Group Joined: 13 May 2014 Location: Surrey Status: Offline Points: 17641 |
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Has it always been like this? Did you have the Zard system fitted from the start? Could you refit the original silences just to check if the problem still persists? Are both spark plugs the same colour? |
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Brian.
Better 5 minutes late in this world than years early in the next. |
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umairkhan
Falcone Joined: 23 Mar 2020 Location: UAE Status: Offline Points: 23 |
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no it wasn't like this from the start. in-fact when i changed to zard, i didn't have this issue at the beginning, i am only noticing now.
Not sure about spark plugs, but it should be same, its a new bike with 1000 kms on it. i dont know if its relevant, but someone bumped into my parked bike and it fell on the right side. on surface everything looks ok.
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Brian UK
Moderator Group Joined: 13 May 2014 Location: Surrey Status: Offline Points: 17641 |
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Well in that case I would check the right side exhaust and the rest of the bike very carefully, as that may well be the problem. Some damage must have been caused.
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Brian.
Better 5 minutes late in this world than years early in the next. |
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c13pep
Senior Member Joined: 31 Aug 2017 Location: Doncaster Status: Offline Points: 2110 |
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The bump may have caused the down pipe to silencer joint to leak, easy to check by putting gloved hand over end of offending silencer and listening at the joint
CHRIS
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you can`t have any fun in a straight line
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