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Old 12-13-2018, 12:43 PM   #1
self_moto
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Paranoia Post: Engine sound

Hey,

So I've did valve adjustment on my street triple, everything seems to work fine, but a bit concerned with engine sound - https://imgur.com/pDgs7Jt

Is it me or there is a ticking noise?
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Old 12-13-2018, 01:45 PM   #2
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if you loosened up the clearances, it isn't surprising that there's a little more noise from the top end
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Old 12-13-2018, 02:30 PM   #3
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Originally Posted by Junkie View Post
if you loosened up the clearances, it isn't surprising that there's a little more noise from the top end
yeah, 3 exhaust valves were tight. Removed ~.050mm to each (put thinner shims)
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Old 12-13-2018, 05:26 PM   #4
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I recently took my 'Strom off line for a few weeks and since it was down I did the valve check and it turned out the front exhausts were right at the spec limit of 0.20mm, everything else was in spec. I ordered new shims but got the number wrong somehow but caught my error. I think it was a conversion error from English to Metric or something like that (I have English feeler gauges and micrometer but shims are in mm).

In any case, because I had to reorder anyway and all the tupperware & etc. was out of the way I decided to put both front and rear exhaust valves at the limit of 0.30mm. The intakes were a little wide of 0.15mm which is mid-spec of 0.10-0.20mm and they don't wear as much as the exhausts so I left them alone. So my strategy was to buy max time before I have to go back in.

When I got humpty-dumpty back together again and fired it up I was a little concerned because my valves were clacking away which I had never heard before. After the conversion error I was super, duper careful and even remeasured the gaps before I buttoned it up so I convinced my self that the clacking is normal if the gaps are at the wide limit, at least for a 'Strom (or SV) 650. Bike runs fine now and with only 7K miles on the clock I am going to ignore the valves till 40-50K miles.

If you took notes then review them and if your replacement shim put the gap at the wide limit then I'd say the clacking noise is normal. If you are tortured by doubt and anxiety then pull it apart and measure the gaps again just for peace of mind.
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Old 12-14-2018, 06:21 AM   #5
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Cam chain probably due to ratchet
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Old 12-14-2018, 12:06 PM   #6
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To troubleshoot an internal noise the first step is to establish the
rate at which it occurs... is the noise in time with the camshaft or
crankshaft??? camshafts rotate 1/2 the speed of the crankshaft...
possible source of camshaft speed noises are shim and bucket
clearances... loose cam bearing blocks... broken valve springs...
possible source of crankshaft speed noises are a scuffed piston...
stuck piston ring... rod bearings...

To pin point the exact location of the noise hold a long tip screw driver or a
length of garden hose up to your ear and probe the suspected area...

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Old 01-08-2019, 08:00 PM   #7
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Quote:
Originally Posted by self_moto View Post
yeah, 3 exhaust valves were tight. Removed ~.050mm to each (put thinner shims)
What were your clearances after you changed out shims? What kind of cam chain tensioner does it have Stock? aftermarket?
It is a bit noisier then it should be.
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Old 01-09-2019, 07:43 AM   #8
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Its probably just the socket that dropped off your Craftsman ratchet while you were bent over looking at the motor.
Just ride it until the noise gets too loud to hear the exhaust.

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Old 01-09-2019, 03:19 PM   #9
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Originally Posted by KC@ BRG Racing View Post
What were your clearances after you changed out shims? What kind of cam chain tensioner does it have Stock? aftermarket?
It is a bit noisier then it should be.
Clearances are between .356 and .371 (that one didn't get though), it has a stock cam chain tensioner, it was actually rattling a lot (especially when just starting up) before I did valve job and re-sit tensioner.

I'm wondering if shims have anything to do with it, I bought set of hotcams shims. I guess I'll ride another 5-6k and will re-check clearances again (if noise will stay the same)
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Old 01-09-2019, 03:20 PM   #10
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Originally Posted by Maddevill View Post
Its probably just the socket that dropped off your Craftsman ratchet while you were bent over looking at the motor.
Just ride it until the noise gets too loud to hear the exhaust.

Mad
Best answer so far!
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Old 01-10-2019, 09:52 AM   #11
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Quote:
Originally Posted by self_moto View Post
Clearances are between .356 and .371 (that one didn't get though), it has a stock cam chain tensioner, it was actually rattling a lot (especially when just starting up) before I did valve job and re-sit tensioner.

I'm wondering if shims have anything to do with it, I bought set of hotcams shims. I guess I'll ride another 5-6k and will re-check clearances again (if noise will stay the same)
It was making the same noise before you worked on it?
If that's the case I would guess the cam chain tensioner.
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Old 01-10-2019, 10:30 AM   #12
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Originally Posted by KC@ BRG Racing View Post
It was making the same noise before you worked on it?
If that's the case I would guess the cam chain tensioner.
Well, I kind of regret that I didn't record how engine sounded before.

But I remember rattling sound on start up (not every time, but very often) which went away after minute of engine running, and I'm pretty sure it was cam chain tensioner (sound was coming from that (right) side of engine and was very recognizable).
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Old 01-10-2019, 11:17 AM   #13
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Quote:
Originally Posted by self_moto View Post
Well, I kind of regret that I didn't record how engine sounded before.

But I remember rattling sound on start up (not every time, but very often) which went away after minute of engine running, and I'm pretty sure it was cam chain tensioner (sound was coming from that (right) side of engine and was very recognizable).
Don't know how far away you are from me here in Pacheco. But if you bring it by I can put an ear to it.
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Old 01-10-2019, 01:13 PM   #14
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Originally Posted by KC@ BRG Racing View Post
Don't know how far away you are from me here in Pacheco. But if you bring it by I can put an ear to it.
Thank you! Will definitely stop by once weather clears up a bit (looking at forecast, guess it would be in a week or so)
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Old 01-10-2019, 02:33 PM   #15
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Thank you! Will definitely stop by once weather clears up a bit (looking at forecast, guess it would be in a week or so)
Let me know
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