Hey there I was wondering if I switchn to 13/52 instead of 15/52 gears, how much change in the perf, low end would be.
I have no idea why the front is at 15, seems tall to me. The bike is awful draggy in the low rpm range as well
The '81 KDX250 came with either a 13/50 (3.8:1) or 14/52 (3.7:1).
The 13/52 (4:1) would be a great choice for finding more low end performance on the trail.
The 15t gearing would be more for street-like performance.