919 front sprocket noise. - Wrist Twisters
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post #1 of 15 Old 04-29-2017, 07:08 PM Thread Starter
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919 front sprocket noise.

Hey guys i have a weird noise coming from the front sprocket. This appeared after cleaning all the gunk from the cover. I also removed the bolt that holds the front sprocket (idk why lol). I torqued it to 40 ft lbs (manual). I made a video. This is with the bike on the center stand and it makes the clunk when accelerating. I also made a vid of the rear sprocket and chain and how. Please check it out. Thank you


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post #2 of 15 Old 04-29-2017, 07:51 PM
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Faulty ECM?

The chain looks too slack to me and it's getting a little worn. Make sure the slack is set right and the wheel is aligned

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post #3 of 15 Old 04-29-2017, 09:45 PM Thread Starter
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I saw a video on youtube of a guy with the same problem. One comment said that his front sprocket wore out where it contacts the spline causing this noise. This makes the fit less sturdy resulting in the clunk. I just checked the front sprocket and it did have some side to side play. Maybe it's time for a new chain and sprocket. Any thoughts?

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post #4 of 15 Old 04-30-2017, 12:42 AM
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With those videos, it's hard to tell if that is chain slap or what, but given how that chain is moving, I'd do an adjustment.

I caught some hell for this because it's dangerous, but I'll describe what I did. I put the bike up on the rear stand, cleaned and oiled the chain loosen up the axle nuts. Then I adjusted the chain to get it close. I then ran it on the stand in 1st gear at idle and adjusted the chain both for how tight and side to side. I did this by SOUND. I got it so close that 1/8 turn on either side would cause more noise. It takes a bit of time, but I was getting a few noises from mine and this got rid of them.

The chain has two adjustments, how tight and the alignment of the sprockets. They have tools to make sure the alignment is right, but you can do this by sound. In addition you can fine tune (IMO) how tight the chain is. I doubt the alignment took can get to 1/8th of a turn.

I clean and adjust the chain this way and I catch fire because of the danger, but I still do it.

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post #5 of 15 Old 04-30-2017, 10:37 AM
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I think the side play of the chain on the sprocket is normal. The chain may be a little worn, but not bad and I doubt that is causing the clunk. I'm with others that the chain looks a bit loose. I would adjust to the specs and then ride it and see how it feels. I think it is going to act a lot different on the center stand that when you are riding it under load.

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post #6 of 15 Old 04-30-2017, 03:06 PM
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How many miles on your chain and sprocket? I had a very similar chain/sprocket noise. It was my front OEM sprocket, worn out at around 17,000 km. It was a loud repetitive clunk. I thought my gearbox was stuffed. The front sprocket looked OK, the chain had no more adjustment left. New chain didn't fix noise. Noise went after I replaced front sprocket. Also your chain does look a little slack.

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post #7 of 15 Old 04-30-2017, 06:57 PM Thread Starter
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I think the front and rear sprocket are original and have never been changed (18,500 miles on bike). The chain is JT and after i tightened it, it had a super tight spot. I adjusted it on the tight spot but the rest had too much slack. Bike has 18,500 mile. This is the oem front sprocket right?

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post #8 of 15 Old 04-30-2017, 07:00 PM Thread Starter
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Oh and the adjustment is well past the green.

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post #9 of 15 Old 04-30-2017, 07:39 PM
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Yeah I reckon your sprockets are past it. Put on a new chain and sprockets. I tried to be a tight arse and just replaced my OEM stretched chain. Left the OEM sprockets on cause they looked alright. That gave the bike a knocking sound from the front sprocket. Put on new sprockets (17t on front) and it's all fine now, very quiet.

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post #10 of 15 Old 04-30-2017, 07:50 PM Thread Starter
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I think i'm in the same situation islandboy was in. I think it's time for the 17/44 520 kit from kyleusa.

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post #11 of 15 Old 04-30-2017, 09:28 PM
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For those considering a 520 conversion from the standard 530 chain I wanted to show a visual comparison and the attached is the best i could find.

The 520 has a 1/4" roller width and the 530 has a 3/8" roller width.
While they both can have sufficient tensile strength if you are concerned about sprocket wear there may be a difference. Especially if you run the chain dry as was evident in the above you tube video. The sprocket for the 520 chain is .227" thick vs. .343" for the 530.

I do appreciate that the 520 package is cheaper and that may be the deciding factor for some folks. The weight savings of maybe 1.5 lbs. total is of no real benefit.
Attached Images
File Type: jpg 520 v 530.jpg (90.4 KB, 11 views)

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post #12 of 15 Old 04-30-2017, 10:00 PM
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When I put a 17 tooth front sprocket on and a 44 rear I used sprockets compatible with a 530 chain, which is what I went with. So a 17/44/530 setup.

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post #13 of 15 Old 04-30-2017, 10:35 PM Thread Starter
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Quote:
Originally Posted by Mark919 View Post
For those considering a 520 conversion from the standard 530 chain I wanted to show a visual comparison and the attached is the best i could find.

The 520 has a 1/4" roller width and the 530 has a 3/8" roller width.
While they both can have sufficient tensile strength if you are concerned about sprocket wear there may be a difference. Especially if you run the chain dry as was evident in the above you tube video. The sprocket for the 520 chain is .227" thick vs. .343" for the 530.

I do appreciate that the 520 package is cheaper and that may be the deciding factor for some folks. The weight savings of maybe 1.5 lbs. total is of no real benefit.
So you recommend the 530 chain over the 520? I clean and lube my chain every week. The vid is right after i put maxima chain wax on.

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post #14 of 15 Old 05-01-2017, 05:01 AM
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If you got 11 years and 17,000 miles out of a stock chain, that's about all you can reasonably expect.


I've gotten to like gold chains. Thet clean up nicely.
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post #15 of 15 Old 05-01-2017, 07:35 AM
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Quote:
Originally Posted by IHellsent View Post
So you recommend the 530 chain over the 520? I clean and lube my chain every week. The vid is right after i put maxima chain wax on.
I don't have first hand knowledge of the durability of the 520 chain & sprocket package. I wanted to point out the differences so you could judge for yourself.
Honda has actually reduced the chain size to a 525 from their standard 530 on the latest generation 781cc VFR's. If Honda had thought a 520 size was good I think they would have gone that way...
Sorry to have doubted your chain lube / condition. It just looks so much cleaner than mine - LOL
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