From looking on the intranet, it looks like the Tracer is a ZX2 with a different look. Most everything with the specs is the same, so it can get 50 with a lil more work
The stock Cd is 0.34, which is a hundredth worse than the ZX2. Frontal area should be around 21-22 ft squared.
I had trips of 55.9 and 52.5 last night and this morning, so my last tank before lean burn should be a 50