Yup- That is interest ( Haram ).
You're better off by joining a Committee ( Where a group of people chip in each month and you get the money after a few months, a big amount ). You can also request the person in charge to give it to you earlier than others, due to your situation.
Or, Suzuki was/is offering bikes on installments, on 0% APR. Ask them
Or, just borrow from someone in your family, give them a check and keep saving till you got enough to pay 'em back and rip up the check.
Btw- what bike is it and what is the value of it? How many months do you have to pay for it?