Use Micro DS drift for the left-hander before start/finish.

Tap DS for the first right corner.

The road into the sewer try to drive in the middle to get a small jump boost.

Pass the pillar on the left.

Jump outside of sewer and try to land on the right.

Use right sidewalk to help DS through the next left.

When road first splits, drive straight ahead.

Next road split you can either Tap DS the first left or continue straight and Tap DS the left at end of road (both routes have similar times).

Last corner use Micro DS drift.

First right corner use Micro DS drift to stay as close as possible on the inside.

When road splits use the right lane.

Continue the road and take the last right corner at the end of it with a small Micro DS drift.

The left-right before sewer drive into the corner staying as much left as possible and then use DS to the right to get out of it.

In sewer stay right of the pillars.

Use Tap DS for the last left before start/finish.