950 valvetrain racket - Star Motorcycle Forums: Star Raider, V-Max, V-Star, Road-Star Forum
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post #1 of 10 (permalink) Old 11-24-2018, 05:26 PM Thread Starter
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950 valvetrain racket

Does anybody else's 950 have a certain light clatter from the valvetrain everywhere but idle? Kinda sounds like a Sportster up top, like an old sewing machine.

I did the 16K adjustment, no idea if they were off at first, I just loosened the nuts and adjusted them all to spec from there. I can't say I noticed it before, just lately it seems a little clattery.
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post #2 of 10 (permalink) Old 11-24-2018, 07:03 PM
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when they are properly adjusted they will tap loud enough to hear them. You hear it more if you have a windshield on the bike, it reflects the sound up to your ears more.

When you dont hear them tapping then you have to worry they are too tight.

Did you let the bike sit overnight and adjust the valves with the engine stone cold? (say yes) If you ran the engine at all and then adjusted the valves, they wont be right.

Next time you check them see if they are within spec before you loosen the nuts. If they are in spec there is no reason it loosen the nut and set them again.

Last time I checked mine they were fine after 12,000 miles since the last check.

Also, make it easy on yourself - there is a range that is acceptable. For example if the intake is suppose to be within 4 to 6 thousands, if the 4 gauge will slip thru and the 6 wont - you are good. Some people try to get the exact snug feel on the middle gauge (5 in this example). Its a waste of your time, the engine runs over a wide range of temps, if the spec is 4 to 6, then thats close enough.
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Last edited by KCW; 11-24-2018 at 08:02 PM.
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post #3 of 10 (permalink) Old 11-24-2018, 08:15 PM Thread Starter
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Engine was cold enough to freeze the balls off a brass monkey. (Google it)

I even lined up the TDC marks with the two little windows for F and R cylinders.

I have a windshield so that makes sense. Since I know valves tighten over time I set the feeler at the widest acceptable dimension per valve, spun the stud down into it, then set the lock nut. I suppose that may add for some audio to the valvetrain.
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post #4 of 10 (permalink) Old 11-25-2018, 02:51 PM
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lower mileage 950s will have more clacking than higher mileage. the first few thousand miles on mine it was noticeable but not so much anymore.

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post #5 of 10 (permalink) Old 11-25-2018, 09:35 PM Thread Starter
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Just turned 18K.
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post #6 of 10 (permalink) Old 11-26-2018, 12:42 PM
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I'm almost at 18k, too. 2010. I think I hear a little clatter when cold that seems to go away after it gets warmed up. At least I think it's valves.

What year is your bike?

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post #7 of 10 (permalink) Old 11-27-2018, 05:23 AM Thread Starter
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09. I'm not gonna fret about this anymore. At first I thought I missed setting one of the adjusters, but then I realized it would happen at idle too, which is quiet as a church mouse.
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post #8 of 10 (permalink) Old 11-27-2018, 07:20 AM
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Tappets gonna tap
Alligators gonna alligate

(they actually named them tappets!)
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post #9 of 10 (permalink) Old 12-02-2018, 04:50 PM
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Quote:
Originally Posted by Mattbastard View Post
09. I'm not gonna fret about this anymore. At first I thought I missed setting one of the adjusters, but then I realized it would happen at idle too, which is quiet as a church mouse.
Good plan. Hope yours treats you as well as mine has been treating me.
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post #10 of 10 (permalink) Old 12-02-2018, 06:51 PM Thread Starter
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Good plan. Hope yours treats you as well as mine has been treating me.
She left me high and dry once 300 mi from home already, but that's from somebody thinking 3mm of belt deflection was loose enough regardless of what the Service Manual says... I'll give her one more chance before she gets "taken out to pasture", so to speak.
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