MX Bikes beta4 (1.08 GB)
This download works as a demo until unlocked entering a license key.

WARNING: This release is BETA and will change significantly over the course of development. If you are not excited to play MX Bikes in its current state, then you may want to wait until the simulator progresses further in development.

Mirror 1 provided by simraces.com

Mirror 2

Torrent

Minimum requirements:
Operating System: Windows 98/ME/2000/XP/Vista/7/8, 32 or 64 bits
Processor: 2 GHz
RAM: 1 GB
Video Card: 256 MB OpenGL 1.2.1-compliant
DirectX Version: DirectX 8.1 or newer libraries
If possible, make sure graphics drivers are updated to the latest official version.

Please note that the following files are unsupported. Downloading them you agree that you are solely responsible for any damage to your computer system and any loss of data that may occur from their use.

PaintEd 1.4 (180 kB)
painted.zip

Bikes and rider templates (31.7 MB)
templates.zip

Track tools (5.93 MB)
tt.zip

Plugin example
mxb_example.c

Input Plugin Interface
input_int.c