Clapping noise when engine braking - Kawasaki Versys Forum
 
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post #1 of 9 (permalink) Old 07-11-2011, 12:42 PM Thread Starter
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Clapping noise when engine braking

I'm hearing a clapping noise coming from my exhaust pipe. I'm not sure if it's related to the gas problem, but it seems to only happen when I'm engine braking.

I only notice it happening when I let off the throttle, as in upshifting or engine braking..

Other things I've done recently: oil change, lubed the chain. I did not do any mods to the pipe.

I have about 1200 miles on it.

Could it be chain slack issue? I have never adjusted it..

Appreciate any thoughts on the issue..
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post #2 of 9 (permalink) Old 07-11-2011, 03:24 PM
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Could be. When engine braking the lower section of chain is tensioned and that section runs right by the exhaust. If it's loose enough to vibrate around that much I'd expect to hear it other times as well but that's certainly not guaranteed. Check the back side of the muffler for marks from the chain. Though you may also be hearing the slack top section smacking something as well. Can only help to check the chain tension. I know my dealer had mine pretty loose.

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post #3 of 9 (permalink) Old 07-11-2011, 03:44 PM
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I would suggest it is exhaust popping on deceleration. It is very common and even more noticible with aftermarket exhausts.

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post #4 of 9 (permalink) Old 07-11-2011, 07:05 PM
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Thats what cars do too! IMO you should first use the highest octane gas you can get from the pumps! That is what is making that noise. It will disappear as you burn that nasty gas out!



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post #5 of 9 (permalink) Old 07-11-2011, 07:40 PM
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Quote:
Originally Posted by macigor View Post
I'm hearing a clapping noise... I have about 1200 miles on it.

Could it be chain slack issue? I have never adjusted it..
Check your chain slack! It's most likely excessive.
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post #6 of 9 (permalink) Old 07-11-2011, 08:16 PM
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Check your chain slack! It's most likely excessive.
Yep you are right invader! Check that chain, probably more likely than the gas issue!



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post #7 of 9 (permalink) Old 07-12-2011, 01:47 AM
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I agree with Bob, you may also be hearing exhaust popping. If the chain is properly tensioned you could try invader's TPS mod. Personally it doesn't bother me because my Nighthawk has a problem with it's idle jet and pops and surges like crazy off throttle.

MTS the octane of the gas is in no way responsible for popping in the exhaust. That is purely a result of the fuel mapping being a bit lean causing the occasional misfire allowing gas fumes to build up in the muffler till it ignites. The V was built for 87 AKI (91 RON), no point in putting anything higher in unless the engine has been modified.

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post #8 of 9 (permalink) Old 07-12-2011, 01:55 AM
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The clapping noise is just your bike thanking you for taking it out for a ride. It's completely normal.


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post #9 of 9 (permalink) Old 07-12-2011, 10:43 AM Thread Starter
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Many thanks to all for help!

I've just measured the chain slack, it's around 2 in. which is a bit loose I assume so the plan is to adjust the chain first and see if the noise disappear.

I should also try the TPS mod, could be helpful on low speeds...
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