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Old 12-24-2011, 12:55 PM   #1
ivancuriel
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Clacking under hard acceleration. 09 R6

Under hard acceleration in first gear, my R6 has a really bad clacking sound. I'm not sure what it could be. My first guess was my suspension, but someone else told me it was my transmission. Under normal acceleration it is fine. When I wheelie and accelerate the clacking sound is bad and the bike jerks on the rear wheel a lot. My rear suspension has taken some abuse, 20k miles of abuse to be exact.

My main question here is. Could this be a transmission problem? Or is it my rear suspension like I think it is.

Any info would help. Thanks
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Old 12-24-2011, 12:57 PM   #2
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Could be your chain. How old it is?
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Old 12-24-2011, 01:00 PM   #3
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Quote:
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Could be your chain. How old it is?
Still the original chain. I will be replacing that soon before anything else.
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Old 12-24-2011, 01:05 PM   #4
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sounds like a chain binding to me
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Old 12-24-2011, 01:09 PM   #5
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i read somewhere that when you replace your chain, you have to replace your sprockets and paint them red
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Old 12-24-2011, 01:18 PM   #6
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it could also be your sprockets being worn, and or a combination of the 2
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Old 12-24-2011, 01:22 PM   #7
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Quote:
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i read somewhere that when you replace your chain, you have to replace your sprockets and paint them red
you read that wrong. you have to paint them pink
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Old 12-24-2011, 01:23 PM   #8
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oops sorry... so, pink to red ratio would alter the torque recommendations right?
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Old 12-24-2011, 01:29 PM   #9
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I had a similiar issue a while back but I was during acceleration, something felt weird and I could hear a clanking,for a moment there i kept thinking my gears were slipping,I got it checked out and I found out that my chain and sprockets were done,i haven't had that feeling anymore since they got replaces,my throttle also had to much slack,hope this helps
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Old 12-24-2011, 01:39 PM   #10
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I love replacing the chain/sprockets...feels like a smooth, brand new bike!
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Old 12-24-2011, 01:41 PM   #11
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Check your chain slack, there should be no more than a quarter inch of slack up or down on that chain (while chain is warm after a brief ride) with a rider on it.

if you are a do it yourself kinda guy and have a buddy to help you, here is what I recommend....ride the bike to get the chain nice & warm, go home park it and lube the chain with chain wax. Then have a friend who is about the same weight as you sit on the bike with the kick stand up. Now take out the little tool kit that R6 came with out of the trunk and adjust your chain to get any excess slack out.

If you do this and there is still that clacking sound, remove the front sprocket cover up there by the front left footpeg and check to see that the BOLT holding the sprocket in place is NOT LOOSE.


Hope this helps you.
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Old 12-24-2011, 01:43 PM   #12
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one more thing, pay close attention to the "Alingment Marks" on the back end of the swingarm that are notched.
Make sure both sides of the bolt have equal amounts of lines showing to make sure that your rear tire is straight.

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Old 12-24-2011, 01:45 PM   #13
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Cush drive is worn.
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Old 12-24-2011, 01:50 PM   #14
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that clacking sound can also be your rear tire is not on straight as your chain may be trying to derail under hard acceleration.
If the back sprocket is not lined up to the front sprocket the chain will try to "JUMP" off track, hence the clacking noise. Or there may be too much slack in the chain that under load the chain is smacking into the swingarm?
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Old 12-24-2011, 01:51 PM   #15
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hopefully you check & ADJUST the "FREE" stuff that you can fix yourself first before you go out buying & replacing parts?!? juss sayin'...
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Old 12-24-2011, 01:52 PM   #16
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Quote:
Originally Posted by dabus63 View Post
Check your chain slack, there should be no more than a quarter inch of slack up or down on that chain (while chain is warm after a brief ride) with a rider on it.

if you are a do it yourself kinda guy and have a buddy to help you, here is what I recommend....ride the bike to get the chain nice & warm, go home park it and lube the chain with chain wax. Then have a friend who is about the same weight as you sit on the bike with the kick stand up. Now take out the little tool kit that R6 came with out of the trunk and adjust your chain to get any excess slack out.

If you do this and there is still that clacking sound, remove the front sprocket cover up there by the front left footpeg and check to see that the BOLT holding the sprocket in place is NOT LOOSE.


Hope this helps you.
I've got a lot more than up and down lol.
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Old 12-24-2011, 02:01 PM   #17
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cush drive will wear out faster if the chain is never adjusted to remove excess chain slack. Wheelies & hard acceleration will "Stretch" the chain and that extra slack will work the cushdrive hard.
The cushdrive is there to absorb the "Drive Line Lash" and too much will wear down that hard rubber. Chain slack is important to keep the bike running smooth.
Remember these sport bikes are Researched & Developed at the race track with constant redline engine speeds and they take more ABUSE on the race track than you can dish out on the street.

Proper maintenance with common sense will help keep your bank account from going into the red.
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Old 12-24-2011, 02:03 PM   #18
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tell you what if it clears up and no rain on monday contact me and I can meet you somewhere and I'll adjust your chain for you.

I live over by the galleria side. Let me know.
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Old 12-24-2011, 02:09 PM   #19
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A quarter inch? Are you nuts? You should have around an inch or so of slack in your chain. If your chain is too tight... Well it can become dangerous and put excessive strain on other parts.

Sounds like you need to replace your Cush drive, chain, and sprockets. Once completed make sure you learn how to adjust your chain every 500-700 miles as well as clean plus lube it. Use the search function ominous the how to section for many many threads on the subject. Also, keep an eye out for the maintenance clinics that Motorcycles Unlimited offers every so often.
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Old 12-24-2011, 02:14 PM   #20
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Quote:
Originally Posted by BigComfy View Post
A quarter inch? Are you nuts? You should have around an inch or so of slack in your chain. If your chain is too tight... Well it can become dangerous and put excessive strain on other parts.

Sounds like you need to replace your Cush drive, chain, and sprockets. Once completed make sure you learn how to adjust your chain every 500-700 miles as well as clean plus lube it. Use the search function ominous the how to section for many many threads on the subject. Also, keep an eye out for the maintenance clinics that Motorcycles Unlimited offers every so often.
re-read what I wrote, WITH THE RIDER ON BOARD and the CHAIN WARM as the chain stretches when they GET WARM???
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