+1 on installments. Maybe short period of 3 or 6 months for interest free installments and longer period with interest (if necessary) so those who don't want to pay 'sood' can also buy bike on installments.
To counteract the potential of dealer mafia and expensive parts, they could sell parts online at reduced rates directly but don't know if that will work since it would undermine dealer profits on part sales (> 10% of part cost).