View specifications, engine power, dimensions ... The narrow aluminum frame on the R1 gets its strength from Yamaha's Deltabox structure with more aluminum in the swingarm and a magnesium subframe.
The R3 is great for beginners, but the R1 is a Yamaha motorcycle better ... but it still carries an impressive engine on its frame. The R7 has an advanced CP2 engine, but what does that entail?