Just got my heritage back. The rollers on my lifters failed and scuffed the cam lobes. I brought the bike in because I could hear squealing that I had not heard before. After a cam and lifter replacement it runs fine. Just can't figure what caused this.mechanic said he had this same problem before and the only thing we had in common was we were both running mobile 1 vtwin. This may be coincidental as I am running a cam with high lift and maybe the stock lifters couldn't take the extra pressure.