Has anyone had problems with new camshaft bearings?
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Re: Has anyone had problems with new camshaft bearings?
15 Apr 2023 00:51 - 15 Apr 2023 01:07Hey 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 availableYou 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
Do you have any clearer pics of the manufacturer insignia?
Last edit: 15 Apr 2023 01:07 by Wookie58.
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- MLMG
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Re: Has anyone had problems with new camshaft bearings?
15 Apr 2023 07:08
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.
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.
1977 Kawasaki KZ1000 A1
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Re: Has anyone had problems with new camshaft bearings?
15 Apr 2023 07:10
I have some here with an inscription, change the number.
1977 Kawasaki KZ1000 A1
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Re: Has anyone had problems with new camshaft bearings?
15 Apr 2023 15:22I got a bag full of around 100 or so genuine shells i use on rotation.I have some here with an inscription, change the number.
All have the Kawa and STD stamping .
The other codes are just batch numbers.
AIR CORRECTOR JETS FOR VM CARBS AND ETHANOL RESISTANT VITON CHOKE PLUNGER SEAL REPLACMENT FOR ALL CLASSIC AND MODERN MOTORCYCLE CARBURETTORS
www.kzrider.com/23-for-sale/611992-air-c...lide-mikunis?start=0
www.kzrider.com/23-for-sale/611992-air-c...lide-mikunis?start=0
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