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85 zx600 ninja

I enquired about any valve work and it did have some valves replaced, lapped, and while t was apart it was honed and new rings installed. It ran and rode as it should until the starter clutch went South. Im gonna pull the trigger and clean the carbs and redo the clutch and see what happens.

The only thing ill need for the starter clutch job is the triangular rubber dampers which isnt that big a deal. Kawasaki says they are still available so ill start there first. If they cant come through ill cruise Ebay until i have all 8 in hand.
 
Oofah. If they REPLACED the valves then you're good. If they lapped them, either you or the next owner is going to have a Sad.

Mad
 
On a somewhat related note, I was working on a friend's 87 Ninja 750. Did you know those things have a BELT driven alternator and that it's INSIDE the cases ? I didn't either until I found his broken. I figured out a way to change it working behind the cylinder head but it was touch and go.

Mad
 
Mad. Supposedly it was a combo of "some" valves replaced and all lapped. I'm currently trying to find the superceded part numbers for the valves. That or has Kawasaki just replaced bad valves with known good ones and kept the same part number? Do you think it's possible that if this bike showed some obvious bad ones and some not being bad when it was opened up that the issue has been taken care of?

Thing is was it just intake valves then? Just exhaust? Or a mix and match of both....know what I'm getting at?. Either way it was in fact running after the work had been done.

And another question for the ninja officials....what all years used the same part numbers as the 85 600?. My thoughts are that if the 85 year was the only year with the problem but they used the same head/valves setup for multiple years then it stands to reason I could buy 86 parts fiche valves and put in the 85 head. Make a reasonably theory?
 
Last edited:
chuck hahn said:
Mad.. I've been thinking do the valves regardless. I'm trying to see what the superceded part numbers were for the replacements. That or any info on what all years are the same as the 85. To be certain is better than to believe it's been done. I'll also look at the engine number.




Anyone know where I might find old service bulletins from back in the day?. I sure am leaning hard but would feel more comfy knowing I can buy the upgraded valves.
Click to expand...

I don't think you can get any of the bad valves anymore. They've been purged. Anything you can get now will be ok.

Mad
 
I'm not sure but the bad valve we saw were always Intake. And like I said above, you can't get bad valves anymore. They made sure they were removed from the system. If it was me, and I couldn't confirm that all the Intakes, at least, were changed, I'd just replace all the Intake valves. That's what we did on my friends 86 ZX1000. I was so confident in that bike after I had repaired it, that the day after the work was done, we took it on a long trip. I ended up buying it from him. Never had any more valve problems.

Mad
 
Might not be too much left on the bone. Im assuming intakes and fork seals will need replaced. Tires are for sure junk. But i think its worth the save. But on the right day and right buyer who knows.
 
I would hold my worries about the valves until after I adjusted the valve clearance and did a compression test.
 
If you have the soft valves you will be adjusting them a lot as they sink into the head. Now guys, don't get me wrong, I actually really like the first generation Ninja 600. They were dominant when I first started following racing. If I ever find one that is more or less complete, I'm going to jump on it. Ill use the valve issue to try to bump the price down.

Mad
 
Does the valve problem apply to the 900?
I've thrown thousands of miles on mine with only routine adjustments.
Maybe it was sorted by '85.
I stepped off of the Blade and onto the GPz fully expecting disappointment but nothing of the sort.
The thing's a certified blast at all times.:cool:
 
Killer Canary said:
Does the valve problem apply to the 900?
I've thrown thousands of miles on mine with only routine adjustments.
Maybe it was sorted by '85.
I stepped off of the Blade and onto the GPz fully expecting disappointment but nothing of the sort.
The thing's a certified blast at all times.:cool:
Click to expand...

Not that I saw at the time.
But it reared it's head again with the first gen ZZR1100. I had a customer one of those drop two valves at idle...
The valve tips were soft on early ones and the collets pulled through.
It was a bone stock engine supplied as a bare unit and installed in a speedway sidecar. It had done one meeting at slowish speed to run it in.
It was being warmed up for it's second ever run when this happened.
Luckily there was negligible damage except to the owner's wallet - 16 valves later....

There was already an upgrade available.
 
Double ouch on the wallet!
Speedway and sidecar sounds no more dangerous than knitting in front of the fire.;)
i have to explain to "bikers" here what speedway racing is.
 
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