Author |
Message |
Captainkirk
| Posted on Friday, September 05, 2008 - 12:17 am: |
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I'm not happy. Last couple of rides on the M2, when I get home (and pull out the earplugs) I can hear my M2 ticking away. It sounds top-endish, though I can't narrow it down to a particular cylinder. I don't notice it on start up with cold oil. I'm running the N8 cams with stock lifters and valve train. Any chance I may have bent a push rod? It's not real loud, just loud enough to worry me and doesn't appear to affect performance. I've checked the exhaust nuts at the flanges (race header) and they're tight. I would imagine a lifter problem would really clatter and run poorly. Any ideas before I start pulling rocker covers? Thanks. |
Kilroy
| Posted on Friday, September 05, 2008 - 06:26 am: |
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Rocker might be tapping the inside top of the rocker cover. N8s have a lot of lift, enough to force the rocker into contact with the cover. Some folks here have ground down the inside of the cover to get a little clearance. |
Captainkirk
| Posted on Friday, September 05, 2008 - 09:59 pm: |
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N8s have a lot of lift Well, not really. Stock lift is .490 on the Sporty cam, lift on the N8's is .500-not a lot of difference. But it'a a good suggestion anyway; and if I end up pulling the cover, I'll check for signs of wear. Thanks for the idea! |
Mick
| Posted on Saturday, September 06, 2008 - 02:34 am: |
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could be a sticky lifter |
Hugie03flhr
| Posted on Saturday, September 06, 2008 - 02:26 pm: |
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If it was me I would try a different oil (because you said it happens when the oil is hot) and if that don't work, give a half of a turn on the valve adjustment.(because they sometimes need a tweek) I like to start with the cheap easy stuff first IMHO |
Djkaplan
| Posted on Saturday, September 06, 2008 - 02:54 pm: |
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Where do you give a half turn on the 'valve adjustment' again? |
Djkaplan
| Posted on Saturday, September 06, 2008 - 02:56 pm: |
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"Any chance I may have bent a push rod?" I had those very same symptoms when I had a bent pushrod... the VERY same. Maybe you should check them... roll them on a pane of glass or a very flat surface... couldn't hurt to at least check. |
Captainkirk
| Posted on Saturday, September 06, 2008 - 10:07 pm: |
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Thanks for the suggestions. I'll let it ride(unless it gets worse...really worse!)until the weather goes to shit. But I've already put off a couple nice long rides due to this and just limited them to an hour or so. First thing I'll do is check valve adjustment..... Then, seeing as how there is no valve adjustment, I'll pull the pushrods and check them for bend. If that checks out, I may dig into the cam case and have a peek at the lifters. Come to think of it, this might be a good time to change the oil pump gear. Sigh..the fun never ends! |
Hugie03flhr
| Posted on Tuesday, September 09, 2008 - 11:14 am: |
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It has been awhile but when did they get rid of the adjusters on the lifters??? Sorry for any misinformation. |
Djkaplan
| Posted on Tuesday, September 09, 2008 - 09:59 pm: |
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Sigh..the fun never ends! Did you over-rev the engine? That can bend a pushrod. I think mine bent (when my bike was brand new) when an exhaust valve galled a guide. It could also be a lifter bleeding down too fast when the oil gets hot. You can nail down the general location by putting a screwdriver to your ear with the tip on various points on the engine... like a stethescope. Try it, it works. |
Brinnutz
| Posted on Tuesday, September 09, 2008 - 10:20 pm: |
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If the screwdriver sounds like chatter on the cam cover...Lifter=bad. Correct? |
Captainkirk
| Posted on Tuesday, September 09, 2008 - 11:04 pm: |
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I've tried the screwdriver, and empty paper towel tubes, to no avail. I can hear the tick pretty much everywhere, though it is much more apparent around the rocker covers. It's really not that loud. It's just that it wasn't there before. I don't think I've over-revved the engine. I've been into the rev-limiter only a couple times. But you never know. I guess the only way to find out is to look, right? |
Kilroy
| Posted on Wednesday, September 10, 2008 - 11:55 am: |
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It may just be increased overall valvetrain noise with the new cams. Higher lift and more duration will result in valves slamming shut faster, no? I notice the same thing on mine (also have n8s), not real loud, no performance loss, just annoying. |
Captainkirk
| Posted on Thursday, September 11, 2008 - 10:50 pm: |
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Ahhh, but the cams have been in there since 2004. I suppose it could be more noticeable since I repacked my race muffler last winter, but it's still pretty loud. I'm pretty sure this is something new. |
Kilroy
| Posted on Friday, September 12, 2008 - 06:31 am: |
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Oh - I thought you just put 'em in. |