You will find that the same company has different rates for different states and then each state has different rates for the suburbs you live in depending on the claims history and profile of your area.
The rider will then be assessed according to age, accident history and demerit points. The bike will be assessed depending on what modifications or accessories you have. If it's under finance, then you can add another loading.
You will find that one insurance company has two or three different insurance companies under its umbrella and they all offer different levels and types of cover with different definitions as to what does and does not qualify as a claim.
They don't ask too many questions when taking your money, but they go through you like Laxettes when making a claim and more so the cheaper ones