My 2007 model's cams were well below the service limit specs so I ordered new stock cams (which measured at the top of the range of the specs). There are some who say that new cams should be broken in by running them at a steady 2000-2500 rpm in neutral for about 15-20 minutes. I don't mind doing this procedure but since I am also installing the BB 351 cylinder and piston, I would have to break the engine in first with the old cams so I can break in the new piston and cylinder properly. Does anyone know if OEM cams actually require a break in?

 

Aside from using a good break-in oil, I don't think any other special procedures are needed.
Follow the service manual to verify the journal clearance is within specs and all should be good.
When I rebuilt mine, I primed the lube system and watched the spray pattern coming out of the cam retainer plate.

 

Thanks, there seem to be differing opinions related to this but most say (like you also said) that stock cams do not require a break in procedure. I actually got a response from Kawasaki and they also said the OEM cams do not require a break in.