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post #1 of 6 Old 05-14-2017, 02:03 PM Thread Starter
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Valve Clearances

Good Evening Morning Afternoon,

Something is bothering me as I am getting mixed messages from the 2 mechanics on when I should get my Valve's checked on my 2004 ZX-12R I have done 16000km's and I am heading to UK end of June 4000km round trip and I am being told to get it checked at 18000km and the other one is 24000km can someone please confirm before I go nuts... as if it's the former then she will be going in to get a check before I go if it's the later when we come back... many thanks.
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post #2 of 6 Old 05-14-2017, 04:36 PM
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As per the workshop manual (for A1 but should be same for all model years) ;

Valve clearance check - 6000km/4000ml
24,000km/15,000ml
36,000km/24,000ml

And so on...

So if the bike is otherwise running fine then you could leave it till the 24,000km mark. Having said that it would be up to you if you want to get it done beforehand for your own piece of mind. My experience is that they don't seem to go out of spec much, but I have always checked the gaps regularly anyway.

Don.
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post #3 of 6 Old 05-14-2017, 05:52 PM
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Don's guidance is good info but I also know that the power can get sweeter as it tightens up. If you read through this forum or any street bike forum I don't think you'll see many where the valves are down zero clearance unless the bike is much older, very high miles, or is beat on. For street use, IMO the bike would have to be a poor example of assembly for the valves to be hung up. Kawi's specs imo is generous.

Last edited by olajoe808; 05-16-2017 at 05:07 AM.
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post #4 of 6 Old 05-15-2017, 01:29 AM
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If you're using the bike near the red line all the time, then check them before your trip, but if like most of us, the rev counter hardly ever gets above 6k then you'll be ok till after you get back, and then some.

For Tech Questions Bike Model letters are more useful than saying the year, for uk owners anyway, as registration year is not always year of manufacturer model.
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post #5 of 6 Old 05-15-2017, 02:40 AM
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Quote:
Originally Posted by ninjayorkie View Post
If you're using the bike near the red line all the time, then check them before your trip, but if like most of us, the rev counter hardly ever gets above 6k then you'll be ok till after you get back, and then some.
emm better get mine checked then :D

Bri . . . .
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post #6 of 6 Old 05-15-2017, 09:06 AM Thread Starter
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Many thanks... I will leave it until I return though I may visit the redline a few times as I am riding through Germany and it would be rude not to visit the upper end of the speed range...
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