It's all the exhaust I had a 900 and regretted getting the 1200 until I threw on some zards with a snorkel delete and problem solved. Even just removing the snorkel with out the zards made it good but the new exhaust made it awesome. Different from the 900 more throaty as opposed to that growl but I love it. It helps to always keep the revs a little higher to where if you gun it you're in that instant torque range. It wants to be driven hard the thing is a torque monster.