I sincerely doubt that.
If he has restructured his mortgage to include the bike, the bike will likely now be unencumbered.
There is not a lot (read 0) incentive for a banker to bother registering a charge to a measley $14k asset to secure a mortgage, let alone one that will depreciate rapidly. I wouldn't even be able to use one as security for a house if I wanted to bother due to depreciation vs loan term.
Not to mention, depreciating assets really cant be used as regulated home loan security anyway... as a business product it is technically possible, however highly stupid and extremely unlikely