I have an 09 Hayabusa with a Yoshimura r-77 full exhaust. I had it dyno tuned but have been studying the dyno chart and something looks fishy to me. Notice the dip in power in the 4-5K area. There is even less power than the bike had with stock header, R-77 slipons, and a can Akcropovic map. Does this look like a bad map job or is this just something common to the R-77? I sent this to Yoshimura but no response really, they just said the max power was ball-park.
What do you guys think. It's interesting because a big share of the street riding goes on around 4-5K so a dip here is not the end of the world but still not optimal.
What do you guys think. It's interesting because a big share of the street riding goes on around 4-5K so a dip here is not the end of the world but still not optimal.