Usually allow for close to 50% so add another $2000 to it then divide that into "36 easy payments" 
Yes they say it's such n such a percent but when you do the sums in true terms it's closer to 50%.
If the bike is a method of transport for work then buy it otherwise id say wait a while longer, $20 per week is $1040 per annum, it's not much to save a decent deposit. That will save a huge percentage of the interest as not only is it a lot smaller amount but you can pay it off even quicker at the same rate of the larger proposed loan
To laugh often and much; to win the respect of intelligent people and the affection of children; to earn the appreciation of honest critics and to endure the betrayal of false friends. To appreciate beauty; to find the best in others; to leave the world a bit better whether by a healthy child, a garden patch, or a redeemed social condition; to know that even one life has breathed easier because you have lived. This is to have succeeded
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