Here's a video of Aprilia RS 457, an inline twin motorcycle with 270 degree firing order, which creates a rather interesting sound. I have tried my best to capture the sound on a rainy ride around Pune

Haven't been able to cross 6.5k rpm since the bike is still in break in period. Also, apologies for all the pops and wind noise in this video. I'm still working on the audio setup and will be improving in the next uploads. So stay tuned, subscribe and keep that bell notification on!