Thinking ahead...do I need to tear into the motor to replace any seals? Recall that this bike only has 11,000 miles. I already have the top end kit from Bob's (http://www.bobsbmw.com/store/product/top-end-reseal-kit-all-r65-models). I'd rather avoid going deeper if possible. I do think I need to pull the transmission off to check/lube the splines, correct? Also, internet claims I can replace the pushrod tube seals without pulling the piston out of the cylinder completely. Clearly, I can't replace the cylinder head gaskets this way. Is this critical?