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Old 11-02-2012, 05:41 PM   #1
gstreff OP
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F800 GS valve adjustment schedule

Anyone up on the max time you can go on an F800 GS valve adjustment.
My bike has 16,000 miles on it and according to BMW of Denver I am scheduled to have the valve adjustment check up at 18,000 miles (used to be 12,000) The bike is a 2009 and has had religious oil changes and not a terrible amount of riding through dust.
My problem is that I am about to head off to ride around Mexico... probably put on around another 4000-4500 miles and would be at 21,000 miles potentially before I got back and would have the valves checked for adjustment.
Any input on that being stupid rather than having the valve adjustment early? Bike is running like a clock right now. Just got back from a full trip Colorado/Alaska/Dawson Yukon. Not a single problem on the trip.
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Old 11-02-2012, 06:06 PM   #2
Indy Unlimited
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My first valve adjustment was needed at 40,000 miles. All of the intake valves were only 0.01 mm tight ( 0.22 mm clearance) I moved them all to 0.33 mm .
The exhausts were also on the tight side of spec or under by only 0.01 mm ( 0.29 mm clearance )I brought them all to 0.41 mm clearance .
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Indy Unlimited screwed with this post 11-04-2012 at 06:17 AM
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Old 11-03-2012, 06:10 AM   #3
JRWooden
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18K miles is now the adjustment interval ???
Wow...
I had not heard that ..............

I do know that the on-board computer keep track of when IT thinks you need to adjust the valves (base on how hard the bike is ridden I presume). I had the first check done at 12K by local dealer to "maintain" the warranty should I need it.
I have a GS-911 and one of the things it displays is the "suggested" mileage for the next check.
In my case it suggested I could let the check slide until about 29K miles.

I've been told that (like Indy's experience) sometimes the valve lash goes down (gets used up) with age ...
(I still don't understand why that is the case )
Anyway, if that's common it might be possible to "use up" all of the lash and then burn a valve if you held off too long...

JRWooden screwed with this post 11-03-2012 at 06:17 AM
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Old 11-03-2012, 06:26 AM   #4
vtbob
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I had my first valve check(not adjustment) done at 30K miles as the dealer did not feel it needed to be done at the 12 and 24k miles services. At 30k miles the valves were checked, but I was not charged for any adjustment shims...so...maybe no adjustment was needed.

there is some uncertainty of the dominate wear mechanism on f800 engine valves. I would hope some one with some factual knowledge would speak up.

the two wear mechanism are the sliding interface of the cam and the follower (the one i believe to be dominate). This would make the valves looser over time/milage.
the other is the wear between the valve seat and the valve itself. this would make the valve check tighter over time/milage.

the bad result is tighter...as it will eventually cause a "burnt" valve seat/valve and them become "leaky"


I asked my dealer exactly the same question at 20k miles before a 10k mike trip to alaska last summer. he said don't worry we'll check them when you get back....that is what I did...per above.

enjoy your trip
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Old 11-03-2012, 02:19 PM   #5
gstreff OP
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Thanks for the input guys. Seems like no rush on checking the valves till somewhere over 18,000 miles
GAry
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Old 11-03-2012, 06:49 PM   #6
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I checked my valves for the first time at 21,000 miles. I did them myself while I was fixing the leaky valve cover. All valves where still in spec. I did this just before leaving for Alaska on a 10,500 mile ride this past summer. I'll probably check them again in the spring. I'm at just over 35,000 miles so far.
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Old 11-04-2012, 01:56 AM   #7
Loutre
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same here: took her to the dealer last week and the dealer just looked at it but said they was nothing to do untill 40000kms (and even that isn't sure). He'll probably just take a quick look and that's it. can't imagine how they'd losen up before that kind of mileage.
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Old 11-04-2012, 07:51 AM   #8
ebrabaek
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As minute dirt particles are ingested over time, the valves wear in their seat. When they wear, the valves will now sit ever so slightly higher up in their seats, causing the valve springs to extend further, causing the valve stem to protrude further, thus minimizing the valve clearance. IE..... They get tighter. A good valve train with high quality valves like these, will not move much with out said ingestion. But you can vary the ingestion factor like with a K&N filter, and then running in the dirt, without a pre filter.....etc..... But with a say 10000 mile filter change, if you run a lot of dirt, I would venture out to say, you vill not see any movement. The wear is not on the cam lobe, and valve stem.....as they are lubed good, but the slow abrasion of the dirt ingestion.
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Old 03-20-2014, 11:53 PM   #9
moto74
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About to go in to my dealer for a 20,000km service on my '13 bike. He says the valve clearances won't need checking / adjusting yet. Is the current thinking that 20km is too early or unnecessary for this (read: for those of us who don't have the DIY skills) ?
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Old 03-21-2014, 03:14 AM   #10
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Quote:
Originally Posted by moto74 View Post
About to go in to my dealer for a 20,000km service on my '13 bike. He says the valve clearances won't need checking / adjusting yet. Is the current thinking that 20km is too early or unnecessary for this (read: for those of us who don't have the DIY skills) ?
Wow. A Dealer not making you spend more? Either a great Dealer or they don't know how to check them.

If the Dealer is OK with it and will stand by the warranty then go for it! Having checked dozens of bikes at Motorrad, I've only adjusted one old K bike. (R boxers don't count.) A lot of the BMW models had their checks extended to 30K km intervals due to findings and complaints. Don't know why the F bikes didn't.

No worries mate. Save your cash for gas.
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Old 03-21-2014, 03:45 AM   #11
moto74
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Thanks. I reckon my dealer is solid, I just wanted to check. Appreciate the advice.
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Old 03-21-2014, 03:53 AM   #12
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I think part of BMW's reasoning is to spread out the cost of maintenance. Our F bikes need a fork oil chg at 30K kms which involves removing them to drain. Add that with a valve check and the 30K bill would be HUGE. Maintenance is usually meant to be done in less than 8 hrs elapsed time to acommodate a business day. Major jobs need more preplanning.

20K on a '13? Must be summer down there.
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Old 03-21-2014, 04:03 AM   #13
moto74
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Yep 20K on the '13.

Feel for you up in the 'north.
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Old 03-24-2014, 07:06 PM   #14
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Laugh

I did mine at 11K no adjustment was needed.
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Old 03-24-2014, 07:58 PM   #15
JRWooden
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at both 13K ant 26K I had one valve on the tight side.........

and ... I've still got to stare at the valve train to try to figure out how these damn things get tighter as they "wear" ..................
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