less weight = more speed.
2017 Tri Street Cup 900, 440 lbs. 55 Hp, 59 Ft lbs torque
2017 HD 883 Iron, 540 lbs. 52 Hp, 53 Ft lbs torque
*** I guessed on the Harley HP, not something they like to talk about or put in the spec sheet***
If you look at the Triumph website the only 17 model year cruiser listed is the Rocket.
No Birds, No Speedys No Muricas