Valve check question - Suzuki SV650 Forum: SV650, SV1000, Gladius Forums

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SV650 Gen2 (03-15) Tech Info, advice or questions specific to the 2003-2015 model SV650.

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Old 07-02-2019, 02:54 AM   #1
mercuryae
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Valve check question

Well, after procrastinating for far too long, I decided to tackle checking the valve adjustment on my 08 SV650S. I've gotten as far as getting the cylinder head covers off.

The shop manual says to use new gaskets. Should I buy replacements or am i safe to attempt reusing them? They look like they're in decent shape.
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Old 07-02-2019, 09:13 AM   #2
Junkie
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Re: Valve check question

If they aren't dried out or hard, they should be ok to reuse. You'll want to put a dab of Yamabond or similar at the corners of the cam bore cutouts.
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Old 07-02-2019, 11:06 AM   #3
dmfdmf
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Re: Valve check question

Reusable if still pliable. Just carefully clean them up without tearing them and be sure to clean the top of the cylinder of any gasket bits that fall into the motor. Some people use way too much sealant. As @Junkie says put a dab of gasket sealant in the corners of the cam cut-out half-moons (circle in red in the attached pic). It doesn't take much, I use a tooth-pic or opened paperclip to put a thin stripe of sealant right at those corners and I have never had a problem.

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Old 07-02-2019, 06:57 PM   #4
mercuryae
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Cool, thanks for the info. I finally got the clearances checked and they fell within spec, but just barely at the tight end. Now the dilemma is whether to mess with them or not.

I posted another thread on the topic:
https://www.svrider.com/forum/showth.../topics/394613
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Old 07-03-2019, 11:11 PM   #5
snailman153624
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Re: Valve check question

Considering I only paid around 2k for the bike and it runs perfect, I'm not going to bother checking clearances unless it starts giving me problems. It's just a work commuter for me that happens to be fun. Not worth the time/effort, nor cost to pay somebody IMO, for something very few people ever have problems with.

Rumor is they tighten up over time. I guess the valve seats wear faster than the stems.
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Old 07-05-2019, 03:23 PM   #6
Junkie
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Re: Valve check question

It's not particularly hard to check, and if you wait until it's giving you problems it may not be something that can reasonably be fixed.

And yes, they tighten up.
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Old 07-06-2019, 01:25 PM   #7
dmfdmf
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Re: Valve check question

First symptom is a fried exhaust valve which is why it is a maintenance check item. I don't see a reason they need to be checked every 7500 miles per the manual. For a street bike, I'd check and adjust them once around ~7,000mi and put the exhausts at the wide-spec and intakes mid-spec (exhaust gaps close faster due to the heat) and then not touch them again till 80K. Rocky Mountain ATV has 2.5mm increment shims to get them spot on.

Last December I checked my DL650 (same motor as the SV) with only 7500 miles and the exhaust valves were at the limit. Seller told me they had been checked at <3000 miles before he sold it to me but I am a "trust but verify" type. It does seem to start easier and idle better after adjustment but far too subtle a clue that they need adjustment. Next check scheduled for 60-70K miles (if I even have the bike at that point).
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Old 07-06-2019, 06:15 PM   #8
sv650bklyn
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Re: Valve check question

I think you meant to say 0.025mm increments. The manual states a 14.5k mile/ 24k km check interval. Thanks for the link though!
My exhaust valves were 0.02mm from the tight end of the spec but the intake valves were right in the middle at 42k miles.
I think I'll set the clearance of the exhaust valves to match the intake valves next winter (I should have around 60k miles on the odo by then).
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Last edited by sv650bklyn; 07-06-2019 at 06:44 PM.
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Old 07-06-2019, 07:20 PM   #9
dmfdmf
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Re: Valve check question

Quote:
Originally Posted by sv650bklyn View Post
I think you meant to say 0.025mm increments.
Oops, yes, dropped the 10^-2 factor

Quote:
The manual states a 14.5k mile/ 24k km check interval.
I was going by memory for my Gen1 (2007) DL maintenance interval, in ten years Suzuki must have learned valve gaps aren't moving as much as they thought. In any case, most of the gap movement is in the first 5000 miles when the valve train is settling in or it wasn't set right at the factory (Yikes!). Common experience on SV & DL forums is they don't move much between 10K to 60K until EOL. Checking is not difficult but adjustment is a PITA but a check is 3/4ths the way to an adjustment anyway so why not set-it-and-forget-it.
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Old 07-08-2019, 09:36 AM   #10
Junkie
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Re: Valve check question

I'd expect the SV to be harder on valves than the DL, due to the more aggressive cams. I believe this increased as time went on, too - I know the 2nd gen has more lift than 1st gen, and then Gladius even more.
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