My team currently does not have access to V5 motors. As a result, we use 2 wire 393 motors, geared for high speed. However, we are having difficulties reaching the platforms. We have done extensive modifications to the drive-train. It is an all wheel drive, using chains, the wheels (when not connected to motors) spin easily and freely, and we have used grease on all moving parts. The total length is ~15". We use 2 motors per side (4 motor drive-train). We currently have the drive-train geared for high speed, using sprockets.
We are having difficulty getting up the platforms (motor sometimes can't push forwards, and stop the cortex). We are still looking, but it seems that the only teams that are having lots of success in platforms are the V5 teams. We can add up to 4 motors (total) to the drive-train.
Please give any and all advice, especially if you have created a 393 drive-train yourself.