Limited liability partnership, also known as LLP. LLP setup costs are borne by Bykemania.
For ticket size < ₹10L, you will give a loan to LLP, motorbikes will be treated as collateral against the loan. Rehypothecation agreement will be part of the loan agreement which forbids Bykemania from selling motorbikes before the amount due to investor is paid.
LLP partnership and other modes like proprietorship, separate company can be considered for higher ticket sizes.