Today I was getting ready to install my camshaft and was checking journal clearances. I previously purchased NOS cam towers as the old ones were badly scored. The bearings on the new towers measure from left to right 0.8677”, 0.8680”, 0.8676”, 0.8677”. The camshaft that I purchased from CycleX is a Webcam CX-4 (equivalent to Webcam 63B). The cam journals (from left to right) measure 0.8640”, 0.8582”, 0.8586”, 0.8642”. Thus, the clearances are 0.0037”, 0.0098”, 0.0090”, 0.0035”. According to the Honda manual, the upper limit on the clearance is 0.0083”. I can’t explain why the two inner cam journals are so much smaller than the outermost cam journals. Maybe I just have the wrong camshaft?
I’ll have to give Ken a call a CycleX and maybe he can shed some light on this for me. Could this possibly be acceptable?