New chain 'knocking' - Wrist Twisters
 
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post #1 of 32 Old 10-21-2013, 04:32 PM Thread Starter
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New chain 'knocking'

Hi all,

Just put on a new chain and sprockets.

used an EK530SRX 114 links
New OEM front/rear sprockets 16/43
used an EK screw-type master

this is my first time putting a chain/sprockets on a bike, but everything looks good. chain is lubed, chain is tightened to spec (1 & 3/8 inch) at all points in the chain, doesn't look like there's any tight spots. front sprocket bolt is tightened to 40lbs as the manual says, rear sprocket bolts at 80, rear axle tightened to 69lbs...

however while the bike is up on the center stand, when I'm rotating the rear wheel by hand, i can hear knocking at the front sprocket. It sounds exactly like this: (this is not me but the sound is identical):
Noise from front sprocket: Honda 919 - YouTube

the guy on the vid said that his chain ended up being too tight. My chain is MUCH more loose than the one in the vid, so I don't think that's the problem.

help...

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post #2 of 32 Old 10-21-2013, 04:44 PM
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Have you ridden it yet? Mine has done that before with a new chain and after I rode it, it went away. Probably just loosened up any links that were a little stiff.

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post #3 of 32 Old 10-21-2013, 04:51 PM
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His chain looks a bit tight to me.

Also, his drive sprocket looks worn.

Everything he describes as to the condition of the internal cover area is totally normal and should be taken care of at normal intervals.

All my bikes seem to make that "knocking noise" to some extent in forward direction. I think it has something to do with the slack being on TOP of the chain when heading into the drive sprocket. That may be a wee bit difficult to fathom, but you are in fact tightening the bottom of the chain and loosening the top of the chain when motion is initiated with the rear wheel in the forward direction.


My greatest worry when replacing any chain is that i do not relieve the pressure of the roll crimp on the master link after I have installed it.

To do that, while the rear tire is off I take the chain and bend it laterally about the master link. This forces that plate away a tiny tad from the shaft end of the two rollers in that link. You can tell you've done it right when there is NO binding in the master link.

Also.................................get on your bike after you have tightened that chain and run your left heel up against the bottom of the chain and push. This tells you immediately how tight your chain is in the real operation world.



It has never failed for me as the last check before go.

My DID 525 ERV Gold has 27,000 miles on her on my ZX10R and she looks pretty damn ready for another 5 or 7 thou.

I said I never had much use for one.
Never said I didn't know how to use it."
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post #4 of 32 Old 10-21-2013, 05:12 PM
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I bet if you put your slack on the loose side of spec (1 3/8") that noise will disappear. If you're within spec on the tight side, you'll be ok. Ride it out and check after 200-300 miles. It should loosen up quite a bit with the chain being new and land you on the loose end of spec or just beyond it.

This might seem real simple but did you lube the chain?

Couple of notes:
-Your slack has to be measured and adjusted on the side stand. Preferably on a clean and freshly lubed chain.
-When your bike is on the center stand, the rear will drop down and actually make the chain tighter vs side stand.
-Being on the loose side of spec is preferred over tight side.

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post #5 of 32 Old 10-21-2013, 05:18 PM Thread Starter
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Quote:
Originally Posted by marylandmike View Post
Have you ridden it yet? Mine has done that before with a new chain and after I rode it, it went away. Probably just loosened up any links that were a little stiff.
Haven't ridden it yet, didn't want to ride it till i knew what was "wrong" with it.

I've checked, double checked the chain tightness and it looks good all the way round. I guess i'll just ride it around and see if that does it.

I did notice though... if I push DOWN on the bottom part of the chain while I turn the rear wheel, the noise goes away significantly. Is that the same effect of someone sitting on the bike? It tightens the chain ever so much right?

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post #6 of 32 Old 10-21-2013, 05:18 PM
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Moral of the story, never clean your bike cause it'll start making noise.

Chain does look tight


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post #7 of 32 Old 10-21-2013, 05:21 PM
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Another good one:

Always wear hearing protection, the minute you forget the ear plugs/phones you will hear 5 different noises that will freak you out.

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post #8 of 32 Old 10-21-2013, 05:34 PM
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Quote:
Originally Posted by zero919 View Post

I did notice though... if I push DOWN on the bottom part of the chain while I turn the rear wheel, the noise goes away significantly. Is that the same effect of someone sitting on the bike? It tightens the chain ever so much right?
By doing so you've taken the slack out of the top of the chain. Re-read my post for verification.

I said I never had much use for one.
Never said I didn't know how to use it."
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post #9 of 32 Old 10-21-2013, 05:36 PM
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loose then slack some... that slack is WAY WAY to tight in that video... 10 bucks says you sit on the bike and the chain has NO slack.

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post #10 of 32 Old 10-21-2013, 05:41 PM
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Not his bike on the vid. I had to edit because that's the same thing I said lol

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post #11 of 32 Old 10-21-2013, 05:44 PM
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Dude, I swear if you search, I have the EXACT same vid I posted when i first got my 9er LOL


....verdict chain too tight

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post #12 of 32 Old 10-21-2013, 06:01 PM Thread Starter
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Not my bike in the vid, but noise is the same. My chain has a lot more slack than the guy in the video. Just using it as a sound reference.

I'll put it on the side stand and re-measure.... I've been doing my measurements on the center stand this entire time.....


crap

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post #13 of 32 Old 10-21-2013, 06:03 PM
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Ah yeah man, don't do that.

On the side stand fo sho

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post #14 of 32 Old 10-21-2013, 06:37 PM
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Chains are best adjusted when clean, lubed and warm.
On a stand is always best, as lean stands beg for leaving it "may be OK to OK" as compared to ease of getting it "just so" re slack and alignment when on a stand.
Race stand preferred.
Centre stand is very OK to use, as long as you make an allowance for whatever the change in slack is for any given bike on or off the centre stand.
Slack should be set for the tightest spot.
Slack should only be checked after a spin, not just after an adjustment screw movement. ( a wheel spin on the stand, if a lean stand, pull it over on the foot and get a helper to spin the wheel for you)
Modern day quality sprockets are so much better than many years ago.
The front and rear radial runouts would combine to net wide ranges of slack over many wheel revolutions.
I have found little variance with my 919 or the GSX-R in this regard.
Personally, my opinion is that slack set tighter than half way through the allowable range is not desireable.

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post #15 of 32 Old 10-21-2013, 07:37 PM
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Quote:
Originally Posted by Bigdaa View Post
...get on your bike after you have tightened that chain and run your left heel up against the bottom of the chain and push. This tells you immediately how tight your chain is in the real operation world.
This ^^ +1.

Rest yr butt on seat, bounce it up and down and get someone to check the chain slack when the suspension is loaded.

It's the only way...

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post #16 of 32 Old 10-21-2013, 07:58 PM
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I've always adjusted mine on the PitBull


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post #17 of 32 Old 10-21-2013, 08:22 PM
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Are you sure your front sprocket isn't on backwards?

Spoiler:

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post #18 of 32 Old 10-21-2013, 09:11 PM
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Quote:
Originally Posted by rickard919 View Post
Are you sure your front sprocket isn't on backwards?
Didn't know they were directional

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post #19 of 32 Old 10-22-2013, 12:45 AM
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Didn't know they were directional
Says the guy who would try to mount a tire sideways

...on my Droid.

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post #20 of 32 Old 10-22-2013, 02:58 AM
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Says the guy who would try to mount a tire sideways ...on my Droid.
Hey! It almost worked!

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post #21 of 32 Old 10-22-2013, 07:43 AM
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Quote:
Originally Posted by voodooridr View Post
I've always adjusted mine on the PitBull
Same here. Always on the stand with the full weight of the bike on the suspension.

I said I never had much use for one.
Never said I didn't know how to use it."
Mathew Quigley
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post #22 of 32 Old 10-22-2013, 06:07 PM Thread Starter
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Thanks everyone for your input.

Ended up screwing around with the adjusters for an hour trying to get the noise to go away, but it wouldn't. So I tightened it to spec again 1 & 3/8 inches while on the sidestand, and torqued the rear axle back up...

eh..., I'll see what happens over the next few weeks of commuting.

have a good one everybody

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post #23 of 32 Old 10-22-2013, 06:11 PM
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Quote:
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Didn't know they were directional
Shoulder is bigger on one side of the sprocket then the other...

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post #24 of 32 Old 10-22-2013, 06:15 PM Thread Starter
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my sprockets are definitely on right btw

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post #25 of 32 Old 10-22-2013, 09:28 PM
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Quote:
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my sprockets are definitely on right btw
Oh for cryin out loud! It's not you bro....when I built my GixMix I unknowingly put my front wheel on backward, now in my defense it was exactly the same on both sides and will actually work either way as long as the tire is facing the right way, well I didn't realize the tire was facing the rear until I started having traction problems in the corners, I just had to turn it around.....there I said it

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post #26 of 32 Old 10-23-2013, 03:34 AM
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Alignment?

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post #27 of 32 Old 10-23-2013, 06:46 AM
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I hate to repeat people when you are confident, but I was too and messed up a nice chain and sprocket by not double checking the front sprocket. I had mine in backwards for a while. Makes a knocking sound and makes it hard to accurately tension.

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post #28 of 32 Old 10-23-2013, 07:33 AM
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Quote:
Originally Posted by ganktor View Post
I hate to repeat people when you are confident, but I was too and messed up a nice chain and sprocket by not double checking the front sprocket. I had mine in backwards for a while. Makes a knocking sound and makes it hard to accurately tension.
I had done the same thing but with a used front sprocket I had sitting around. It was dirty and I never bothered to clean it. As soon as I spun the wheel, I heard the knocking. First thing I did was clean the sprocket to look for the number stamp. Wrong way.

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post #29 of 32 Old 10-23-2013, 07:50 AM
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Quote:
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It was dirty and I never bothered to clean it....
TWSS

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post #30 of 32 Old 10-23-2013, 08:38 AM
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Ewwww

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post #31 of 32 Old 10-23-2013, 08:54 AM
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I do like it dirty. Good catch mike.

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post #32 of 32 Old 10-23-2013, 05:55 PM
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Mine made the exact same noise at the beginning of the season. Pulled the front sprocket and applied grease to the splines, reinstalled and the noise was gone. Not saying this is your fix but it worked for me.

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