Capital gains on VMX bikes would not exist unless it was a CCM or metisse or something a bit rare and exotic, hence the $10000 rule so if you sell a boat of something of the like, watch out
The ATO defines a personal use asset as follows
Personal use assets
A personal use asset is:
a CGT asset, other than a collectable, that is used or kept mainly for the personal use or enjoyment of you or your associate(s)
an option, or a right, to acquire a personal use asset
a debt resulting from a CGT event involving a CGT asset kept mainly for your personal use and enjoyment, or
a debt resulting from you doing something other than gaining or producing your assessable income or carrying on a business (for example, the debt arising from a private loan that you made to a family member or friend).
Personal use assets may include such items as boats, furniture, electrical goods and household items. Land and buildings are not personal use assets. Any capital loss you make from a personal use asset is disregarded.
If a CGT event happened to a personal use asset, you disregard any capital gain you make from the asset if you acquired the asset for $10,000 or less.
If you dispose of personal use assets individually that would usually be sold as a set, you get the exemption only if you acquired the set for $10,000 or less.
Clear as mud