Got it, thanks guys. So let's just say that the bike no longer looks like a 2004 Big Dog chopper, it's raked much more and the rear is fatter and it's longer and higher, etc. The VIN is the same, but some really nosey officer pulls me over who happens to have a Big Dog chopper, and realizes mine looks nothing like it. If I were to say "Hey, I cut the neck and raked it out", would I be within the law? Inspection aside, I've never had a bike inspected in 10 yrs and never had an issue. Considering the resale market is shit right now, I'm planning on making some radical changes to the bike, but I'm not sure how far I can go without having an issue. Are you allowed to stamp a blank frame? I'm sure I don't even have to tell you what they told me at DMV, basically 10 different answers from 10 different people, including one who told me I have to goto the FAA to register a "chopper".