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UglyDL

Valve clearance on DR650

27 posts in this topic

If you've checked the valves on your DR650, how far out of spec were they? How many miles were on the bike when you checked them?

I'm gonna crack mine open later this month, just wondering what's "normal."

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Checked at 500, 5000, 10k.

I adjusted them at both 5000, 10k to the loose end of spec.

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I adjusted mine at 1K they were .006 & .008 and again at 7.5K were all loose. Spec. is .003-.005 and .007-.009. Loose is better than tight but I'm hoping they will stabilize soon.

I'm curious if those of you doing your own adjustments do them in pairs or one valve at a time. The manual I have makes no mention of this detail yet all others I've done require doing them in pairs. Any opinions? The end result is very different.

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dflow- I know it's a rediculous question, but did the bike feel any different after you adjusted the valves?

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Can't say in miles, but when i got mine, it hadnt been much used since new, six years old and probally never really loved, the valve's were a litle to tight.

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I did mine at 600 and then checked them at 2000. They were loose at 600 but did not change. I will check them soon at about 5000 but expect no change.

Oh, i noticed no change in how the bike felt or ran.

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dflow- I know it's a rediculous question, but did the bike feel any different after you adjusted the valves?

Not at all. It would have to be way out to feel it. Unless they close up that is.

I would really like to know if anyone can answer my earlier question about method.

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Just did mine after 26000km of ownership and the intakes I left alone.

The exhaust I adjusted from .17 (tight end of spec) to .20mm.

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I adjusted mine at 1K they were .006 & .008 and again at 7.5K were all loose. Spec. is .003-.005 and .007-.009. Loose is better than tight but I'm hoping they will stabilize soon.

I'm curious if those of you doing your own adjustments do them in pairs or one valve at a time. The manual I have makes no mention of this detail yet all others I've done require doing them in pairs. Any opinions? The end result is very different.

In pairs eh? I think that would be more difficult and more room for error. Trying to hold everything in place to tighten and what not. I have the kit from kietech.com so I not familiar of doing them in pairs. I can see how it can be done, but doing them one at a time then rechecking after tightening is what I do. Seems easy enough that way for me.

So what the process to do them in pairs? Special guages??

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No special tools. You just use 2 feeler gauges. It accounts for the running tolerances between the rockers and shaft. If you set the valves seperately the end result actually ends up being tighter when both valves are under load. I have worked on many multi-valve bikes and all have spec'd. setting them in pairs. It is more difficult to do but once you have done it a couple times it's not bad.

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I did mine at roughly 750 miles and they were just on the loose side of the specs, I left em there as looser is better than tighter.

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I'm not sure i totally follow the "pair" idea?..Are you saying because the rocker has two arms that the tolerance between the arms could cause the clearances to be off?

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If you set the valves seperately the end result actually ends up being tighter when both valves are under load.

plz enlighten us....

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plz enlighten us....

One rocker arm two valves. Any play between the rocker arm pivot and rocker arm shaft will be taken up on the valve you are adjusting. This would dip the other adjuster downwards toward the valve.

But! Unless you have a really thrashed engine with lots of slop between the pivot shaft and the rocker (you know, like from running that cr*ppy dino oil :busted: ) we only are talking maybe .0005 inches of possible change. The tolerance is extremely tight on the rocker and shaft. I'd bet the lions share of guys don't get their valves adjusted within .0005 of each other anyway. :banghead:

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Is valve noise normal during start up? I adjusted them and can't remember if that is normal to have some valve noise during start up, but goes away after it's running.

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Is valve noise normal during start up? I adjusted them and can't remember if that is normal to have some valve noise during start up, but goes away after it's running.

Yes it is normal.

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