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/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> Post Valve Adjust Question /cgi-bin/YaBB.pl?num=1145586050 Message started by Kent on 04/20/06 at 19:20:50 |
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Title: Post Valve Adjust Question Post by Kent on 04/20/06 at 19:20:50 Recently did a valve adjustment. Afterward I heard more tapping than before, but have always heard "a tappy valve is a happy valve." However, even for a thumper, the bike used to have a throatier, manly, sound. Now, it's very much more treble. Is that to be expected? Will the sound deepen as the valves tighten up? Or is the change in sound totally unrelated? And ideas? |
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Title: Re: Post Valve Adjust Question Post by Reelthing on 04/20/06 at 19:56:41 Kent wrote:
Not really - correct set valves make a little tap'n but not very much. are you real sure you got the clearence correct? what do you mean by "as the valves tighten up" - on this engine they get looser not tighter over time like a shim'd valve. |
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Title: Re: Post Valve Adjust Question Post by Savage_Rob on 04/20/06 at 21:08:41 Also that it was at TDCC. |
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Title: Re: Post Valve Adjust Question Post by Kent on 04/20/06 at 22:50:20 1. I'm very sure the adjustment is correct. 2. On my inline 4 cylinder, the tappets tighten over time, I wasn't aware this engine was different. Dangit! 3. I'm wondering, I just added a windshield. Maybe that is routing the noise upward instead of dispersing it like before. Maybe it's all my imagination. All I know is when I was testing it, my wife said "why does my bike sound like a girl?" Argh! But at least the oil leak is gone. |
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Title: Re: Post Valve Adjust Question Post by Kropatchek on 04/21/06 at 01:58:28 Kent wrote:
The motor makes a different sound with windshield on and off , my experience. And as general remark: was the engine at TDC in the compression stroke? I use a feelergauge 0.005" for in- and exhaust, works for me. Greetz Kropatchek ;D |
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Title: Re: Post Valve Adjust Question Post by Kent on 04/21/06 at 17:22:43 It was either at TDC or BDC, LOL!!! I'm sure I had it right. It runs fine, just sounds funny. |
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Title: Re: Post Valve Adjust Question Post by red2k1 on 04/21/06 at 19:22:07 Just adjusted the valves on my '02 and the exhaust note is definitely higher. |
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Title: Re: Post Valve Adjust Question Post by babbalou on 04/21/06 at 19:22:19 My S40 sounded a little different with the windshield on too. Might be that. |
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Title: Re: Post Valve Adjust Question Post by Savage_Rob on 04/23/06 at 00:32:35 The only reason I mentioned TDCC (not TDC) is that the first time I adjusted mine, I had think I had it at TDC but not on the compression stroke as the existing gaps didn't seem right. Fortunately it was pointed out to me that it must be TDCC and I readjusted before running it. The only reason I hadn't run it by then was that I'd done the plug fix and snapped off a bolt and hadn't received its replacement yet. Anyway, as long as you're sure it was on the compression stroke, cool. I just thought I'd mention it. |
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Title: Re: Post Valve Adjust Question Post by Kent on 04/23/06 at 17:39:45 I used the manual and lined up the mark as it showed. Should that be enough to get it TDCC? |
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Title: Re: Post Valve Adjust Question Post by diesel on 04/23/06 at 21:47:42 NO |
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Title: Re: Post Valve Adjust Question Post by Kropatchek on 04/24/06 at 03:35:44 diesel wrote:
That's not enough. Check the rockers have play ( meaning both inlet- and exhaust valves are closed). Greetz Kropatchek ;D |
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Title: Re: Post Valve Adjust Question Post by Savage_Rob on 04/24/06 at 06:44:20 Kropatchek wrote:
Absolutely. I also liked the idea of using a piece of wooden dowel inserted into the sparkplug hole to help you see when the cylinder is rising and then aligning the timing mark in concert with that. I haven't done it yet but I plan to then next time I adjust the valves. |
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