A rc racing class that is steadily getting more popular is 1/5th scale rc motor bike racing. Bigger races are organized every year and more bikes are coming onto the market and getting more hi-tech with each release. The bikes come as electric and gas powered and basically use the same electric gear as the 1/10th and 1/8th scale rc cars. They also feature disk brakes, hydraulic suspension, carbon fibre chassis and more of such goodness. It is really good fun to watch these bikes race, it looks very realistic!

Nuova Faor SF506 LE

AR Racing , an Italian company now also has an rc dirt bike available, the ARX-540. I found this video on YouTube and was quite impressed with the bikes capabilities. Pretty amazing how stable it runs on an off-road track and how it jumps, drifts and pulls wheelies etc. You would hardly think this is possible on two wheels guided by radio contril, very cool!