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post #1 of 7 Old 08-09-2012, 05:05 PM Thread Starter
 
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Quick Question

Quick question..To help settle an arguement. Which is more likely. Valves will loosen or valves will tighten?
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post #2 of 7 Old 08-09-2012, 05:20 PM
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Shim and bucket valves only tighten. Valves: Why your valve clearances get smaller as the engine wears in.

Pat- 2007 DL650A was ridden to all 48 contiguous states. I didn't quite make it to 17,000 miles on the 2012 DL650A.
Nicknames I use to lessen typing, Vee = 2002-2012 DL1000s. Vee2=2014-2016 DL1000s. Wee = 2004-2011 DL650s. Glee = 2012-2016 DL650s
See https://www.stromtrooper.com/general-...nicknames.html

Please vote in the poll on what Strom(s) you have at https://www.stromtrooper.com/informat...-you-have.html
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post #3 of 7 Old 08-09-2012, 06:41 PM
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uh oh,

I am going to get heat here but they can do both. I would agree with GW to a point that "most" will tighten, but cam wear will show up as loosening even on shim and bucket valves. But mostly they tighten up. I do agree with the link to a point. The first valve adjust is most important. Bt after the valves settle in, then the wear at the followers is not offset by seat recesion.

On rocker arm style its 50-50 either way.

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Last edited by Scott E. Bonds; 08-09-2012 at 06:46 PM.
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post #4 of 7 Old 08-09-2012, 10:26 PM
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I so rarely get to say, "slappy valves are happy valves."

Everything I've ever heard or read suggested that when doing valves, they should be adjusted to the higher end - rather than the center of the spec - to allow for tightening up. Loosening is not a concern.

I think there's a survey on here somewhere to the effect of "when you checked your valves, were they tight, loose, or right on?"
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post #5 of 7 Old 08-09-2012, 11:28 PM
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Originally Posted by phoenixsteve View Post
I so rarely get to say, "slappy valves are happy valves.""
Hahaha. I'm glad you found an outlet
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post #6 of 7 Old 08-09-2012, 11:31 PM
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Admittedly, my experience with doing valve clearances (that I can remember, not including some old Yamaha parallel twin I did 20 years ago) is limited to three bikes, all with DOHC and 4 valves per cylinder. One had forked rockers with individual threaded adjusters for each valve (ZG1000 Concours), the second had individual rockers and shims over buckets (ZRX1100), and then the V-Strom. On all 3, valves that were out of spec when I checked them were tight. As I understand it this mostly due to valve seat wear over time.

To get looser, some part of the valve actuation mechanism would have to be wearing - cams (on the "flats" of the cams? seems unlikely), rocker arm wear surfaces (or rocker bearings), or the head of the valve stem. None of those are impossible, but they're not "normal" wear. I'd say if you find valve clearances getting looser, there's something going wrong.
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post #7 of 7 Old 08-10-2012, 08:24 AM
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Valves and seats are POUNDED onto each other and the valve "sinks" into the valve seat. The valve sinks so that the "gap" at the end of the valve stem gets smaller.

Note If you bounce onto your rev limiter alot then 1/2 your valve check time and mileage.

HEH has anyone ever degreed their Vee and seen any benefit ?
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