Fast Faster Ride Downhill Aprilia Rs4 50 Bikefree - Honda CBR300R vs Kawasaki Ninja 400 vs KTM RC390 vs Suzuki GSX250R vs Yamaha YZF-R3 - On Two Wheels - Duration: 10:22. Motorcyclist Magazine 762,506 views So after being nudged by toratora to start a project of this I thought why not!! I brought this 2018 in June for my 14 yr old daughter and I was majorly disappointed by the performance of it. Even if the Aprilia RS4 50 belongs in one of the lightest cl.es in Moto GP racing, you can’t deny that the bike has produced some pretty amazing results in its short period of time. Fast Faster Ride Downhill Aprilia Rs4 50 Bikefree.