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View Poll Results: How many miles until you checked valve lash
10,000-15,000 miles 106 28.88%
15,000-20,000 miles 99 26.98%
20,000-25,000 miles 67 18.26%
25,000-30,000 miles 30 8.17%
Over 30,000 miles 65 17.71%
Voters: 367. You may not vote on this poll

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Old 01-15-2009, 11:11 AM   #1
VRTURK
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Valve lash interval poll

I have a few questions for you about having your valve lash checked.

1st) This poll is for how many miles you have ridden before checking the valve lash without negative results for not following the recommended service interval.

2nd) For those of you who have exceeded the service recommendation, please post up what the findings were when checked, How many shims were changed. How much of an adjustment was needed with the changed shims?

There have been many times I have seen people post how far beyond the service recommendation they went without issues. This will collect all this information in one spot.
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Old 01-15-2009, 11:24 AM   #2
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When I pulled my motor out of my 04B to do performance work it had over 16k miles on it. Before tearing it apart I checked lash and all check ok according the manuals specs. I get very skeptical when I hear about dealerships changing peoples lash when doing 10k or 15k mile inspections.
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Old 01-15-2009, 11:31 AM   #3
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I have an '02 so the recommended interval was 10,000 miles. I'm a conservative rider and have a knack for understanding what my engine is doing, so waited until 17,000 miles to check the first time. According to my dealer no adjustment was required. I waited until 40,000 for the second check, which I did myself with some expert help from a (certified) friend. Five of the eight valves were just out of spec. All were out on the 'too much clearance' side so I feel that these systems wear just like most other valve trains and gain clearance rather than losing it.

Based on my findings, I think a conservative rider can go 20,000 miles between checks, and a more aggressive rider should probably stay closer to the manufacturer's recommendation, i.e., should check clearances at least every 15,000 miles. Those with modified valve trains with heavy springs, etc., are on their own.

This is just my own opinion, and not official in any way. My opinion is based on one machine which did require minor adjustment after 40,000 miles.
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Old 01-15-2009, 11:46 AM   #4
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My belief is when you come to checking the lash you might as well add a little displacement. Sorry, never lashed mine before building it up.
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Old 01-15-2009, 11:49 AM   #5
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I try to do mine every 30k or so even if they didn't need it then. The valve lash checking is way off and my fear has always been that dealers are setting them wrong because they keep saying the gap is greater and not less as it should be.
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Old 01-15-2009, 11:50 AM   #6
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I checked mine just over 20k and all valves were in spec no adjustment needed
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Old 01-15-2009, 12:09 PM   #7
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You might already know the attachment, it shows the valve lash course in 64.000 miles endurance test. This is from a most valuable article "Revolution Engine <br /> The New Water-Cooled Four-Valve Engine from Harley-Davidson", MTZ worldwide Edition: 2003-03 which can be purchased here:
The authors are the heads of the Porsche engineering team who helped developing the revo engine: Klaus Fuoss; Wolfgang Schnepf; Manfred Schürmann; Johannes Weyandt; Patrick D. Keller




Despite the bad quality it is obvious that both intake and exhaust valve lashes do remain within their tolerances.
Nevertheless I find it advisable to verify the initial settings after 250 operating hours.
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Old 01-15-2009, 12:15 PM   #8
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Quote:
Originally Posted by Jan-Dirk View Post
Nevertheless I find it advisable to verify the initial settings after 250 operating hours.
How am I going to calculate 250 operating hours?
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Old 01-15-2009, 12:20 PM   #9
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with brain?
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Old 01-15-2009, 12:21 PM   #10
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well at a constant 120 mph thats 30,000 miles. ahaha im just messin
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Old 01-15-2009, 12:24 PM   #11
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Cowboy Klaus, I haven't talked to that guy in a couple years. Very cool cat. He was the lead design engineer for Porsche which is a very formal company. Klaus, would work in shredded jeans, t shirts, and a wicked mullet. Very into 80-90 rock! He did what ever he wanted because he is such and incredible design artist.

Back on topic, post up your experiences with lash please!
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Old 01-15-2009, 12:25 PM   #12
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RJ I know you've lashed your bikes? Post up man!
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Old 01-15-2009, 12:32 PM   #13
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ive ran my overhead twice, once at 25000 from new , just slightly out on shims, and again at 33500 barely out of specs and i drive the heck out of that ol mule
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Old 01-15-2009, 12:33 PM   #14
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I have no clue if mine has ever been checked. When I first read the title of the post I was thinking valve stem on my tires. I dont know a thing about the engine except that it goes fast when I give it gas!
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Old 01-15-2009, 12:35 PM   #15
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Quote:
Originally Posted by rjrivero View Post
How am I going to calculate 250 operating hours?
That's about 10,000 miles for most people. Which is, um, bad news, on the face of it.
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