Has anyone had problems with new camshaft bearings?

The set I have also came fro Z1E and the bag says made in Taiwan and the shell has no markings. All the other sets I have purchased have come from Z1E and installed with no issues. 

Dr. Gamma wrote:

You got my curiosity up with your problems with the cam bearings. I opened up a few bags of O.E.M. Kawasaki cam bearings (#13034-030) and did some checking of the one I have on hand. Looking at the photo of all your replacement cam bearings one thing I think I see is that there does not seem to be any chamfer on the oil hole. All the bearing halves I have on hand have a slight nicely chamfered edge on the trust side of the oil hole!!!!! My old and retired eyes might not see them on your bearings, but mine all have it. The other thing I noticed every one of my O.E.M. bearing halves on the backside of them are 'D5A' and 'STD' stamped on them!!! Along with an company insignia. Bet you 10 to 1 that Kawasaki factory bought these bearing halves from an outside supplier in Japan. I wonder if somebody out there found another supplier of that same size cam bearing???? Check and see if your cam bearings have those stampings on them. If not I just wonder if those bearings are not actually identical in size or quality to the REAL KAWASAKI cam bearings


 

Hey Doc that is really interesting, the fact that the back of the bearing is marked as "STD" would suggest that even if KHI didn't offer them the supplier may well manufacture in different sizes. In the car world "undersize" shell bearings are common (particularly for crank bearings) allowing the builder to re-grind "out of round" journals. These would be marked the same as oversize pistons but with a negative number E.G. -0.05 etc. There are a lot of damaged cams out .there that could be saved if undersized bearings were available 
Do you have any clearer pics of the manufacturer insignia?

It is seen that the "best material" is sent far away.

What you say is striking, the camshaft bearings that I bought did not say anything.

Look on the Z1E website how the bearings now have an inscription and added the legend made in Japan. 

I have some here with an inscription, change the number.

Is this one of the old ones or a replacement ?

It's an old one, belonging to a horrible cylinder head that I bought in Argentina.

Very nice bike. Good to hear it’s sorted out. We’re did you get the heavy duty aluminum engine to frame brackets. 

MLMG wrote:

I have some here with an inscription, change the number.

I got a bag full of around 100 or so genuine shells i use on rotation.
All have the Kawa and STD stamping .
The other codes are just batch numbers.

Thank you very much, I leave you the link.

japan.webike.net/products/1522461.html

Next I leave a video with the smoke coming out of my motorcycle, do you think it is normal for the first ignitions?

Tomorrow after one more ignition I remove the spark plugs and send photos of them.

Video Kawasaki humeante.

Don't run it stationary for any length of time , Just get out and ride it asap. 
Don't baby it and give it plenty of loaded pulls and engine braking without over revving.
The first 20 mins and 20 miles will govern the future engine performance.
Don't bother with all the 500 miles running in at whatever rpm malarky either, it will do more harm than good.

Is that breather blocked off? I agree finish it and run it asap.
Steve