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How many miles until you checked valve lash

  • 10,000-15,000 miles

    Votes: 113 27.3%
  • 15,000-20,000 miles

    Votes: 107 25.8%
  • 20,000-25,000 miles

    Votes: 77 18.6%
  • 25,000-30,000 miles

    Votes: 37 8.9%
  • Over 30,000 miles

    Votes: 80 19.3%

  • Total voters
    414
141 - 160 of 178 Posts

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I just has valve lashes check at 14k miles, all within spec. Harley dealership mechanic seemed to think that I wouldn't need to check them for another 30k miles (service sheet recommendations aside).
 

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Glad I read this....though I did skip the middle pages. if I am not mistaken, this engine loosens with wear, rather than tightening, like some Japanese high revvers do?

I'm not going to waste a lot of time or money ripping things apart without very good reason, so it'll be doing mega mileage (60,000 miles was mentioned with NO adjustment needed!!!) before I check unless it starts to sound noisy.

I do this sort of thing myself, or (rarely) use independent specialists if I don't have the right tools, I don't trust dealers at all...

I use Amsoil oil and filters.
 

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Man after my own heart! I see the same "chasing hp" on the XR sites; chrome this do that for 1 or two hp. Not worth it. I guess I am to old school. If you want power cube up, then worry about intake and exhaust.
Most important, I change oil every 3k, dino 20/50, never has failed me - read a post on the GS forum where a rider had the synth oil analyzed and they stated he is good for another 5k; the synth already had 10,500 miles on it! That is so wrong! He must have never heard of combustion byproducts and moisture.
I guess what I am saying is that once the motor is past the "infant mortality" stage, regular oil changes (3k) is the best way to get the maximum life out of a motor.

My $0.10 worth!

:soapbox: On regular oil changes
True. It's the muck in the oil, and the water, that causes the problems. Water combined with blowby gases causes acids to accumulate in the oil, and this also degrades it.

In an ideal world, all internal combustion engines would be fitted with a secondary filtration system which would microfilter the oil and also remove water.

This is used on many fleet vehicles (it's called bypass oil filtration), but rarely on bikes, due to lack of space and general lack of awareness.

Rather than changing the oil, I'd like to see a system which would allow a tube to be stuck down the filler hole and the oil sucked out, pumped through a fine filter system and returned, free of particles and water.

As long as some fresh oil is added, the additive cocktail seems to be fine for surprisingly long periods.

Of course, using the best possible oil is a good idea too.....
 

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caferacer
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5,686 Posts
50 riders have not done valve lash until after 30K.
 

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caferacer
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5,686 Posts
Valve Lash check past 30K....

I am at 30k now and never checked, and mine seems to run better and better.

Whats the worse that can happen? Eventually the valves will not close all the way and loose some compression?

What mileage are you at now without valve lash?

rbnky @ 61K
wild bill @ 30K plus
ELUSIVE 1 @ over 40K today
 

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_NoHighLikeMostHigh_
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2,107 Posts
What mileage are you at now without valve lash?

rbnky @ 61K
wild bill @ 30K plus
ELUSIVE 1 @ over 40K today
I'm at 16K and was starting to worry about it but seems compared to all you I'm worrying a bit too early for nothing :).
 

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16,000 mile lash results

2003, 16,000 miles, performed April 30, 2012.

I'm an ASE certified master auto mechanic...cars, not bikes, but the same principles apply.

Spec:

Exhaust .0117 to .0135
Intake .0078 to .0096

Front cylinder:

L ex: .012
R ex: .014 *

L in: .009
R in: .011 *

Rear cylinder:

L ex: .012
R ex: .013

L in: .009
R in: .009

Since adjusting the clearance is quite a chore, and none were too tight, I left them alone. Sometimes, you can over-maintain things...

I must say, though...whoever designed this frame was a real jokester! "Hmmmm...can you get the valve covers out? Yeah? Ok, frame is still too big..."

How much do dealers charge for this service?

Gerard
 

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I am at 30k now and never checked, and mine seems to run better and better.

Whats the worse that can happen? Eventually the valves will not close all the way and loose some compression?
What happens when valves don't shut completely and for long enough, is that heat from the valve head is not transferred to the valve seat. The valve then overheats, and burns, causing loss of compression, and expensive repairs.

If the valves get way too loose, the cam starts to contact away from the built-in "ramp" and hits the flat bucket a little harder than normal. This will cause quicker wear on the cam and bucket.

Overall, it's better to be a "little" too loose, than a little too tight.

Gerard
 

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Posting From The Pub
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7,850 Posts
It is just such a horrid job I'll keep riding it until the top end fails and then give it a big bore.

I don't want to do it myself and I don't trust anyone else...
 

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14,891 Posts
It is just such a horrid job I'll keep riding it until the top end fails and then give it a big bore.

I don't want to do it myself and I don't trust anyone else...
The valve lash was my opportunity to do a cam upgrade and anything else while it was open.
 

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Another Ski season
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2,631 Posts
30,000 + never checked no issues. Like some of you can't/won't do it myself, don't have anyone remotely close I trust. So I'll just keep changing tires and riding.
 

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Just hit 20k on my 04 B and im gonna push her a little more till i do her valve lash check... maybe throw in some new cams...
 

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697 Posts
Valve adjustment

20k gonna check it myself soon,but not in a hurry.Sounds as good as it did new.Ill do it by 30k.I change oil religisly,synthetic and at that cost,i hope i can benefit from not worring about the overhead anytime soon.

2012 NRSDX ANS:vrod:
 

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Kidzap
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1,065 Posts
While checking the valve lash is an important maintenance procedure I'm more worried about the chain wear. From what I've seen reported most valves are only out about .002" loose which doesn't effect anything other than a tad more noise coming from the cams. On the other hand we all know that chains will in time stretch. So after many attempts at various HD dealers I found one willing to sell me secondary chain tension tool which I'll be using this winter during the off season. I'll be at 50+K at the end of this riding season. I'm with Louis on this one, when the top end fails, then I'll do something about it.

IMG_0595.jpg

It seems as though HD thinks only qualified HD techs know how to use tools and usually won't sell the specialized tools to John Q Public.

Which is in my mind > :bs:
 
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