2003-2008 Z400 is Carbureted
2009-> is Fuel Injected

All HMF exhaust jetting has been predetermined with proper jetting specs to ensure the ultimate performance from your HMF product and should be used as a reference only. The proper jetting will ensure the full performance potential from your HMF aftermarket high performance pipe and is necessary on all machines.

• (2003-2008)Basic Jet Kits Includes: Mikuni Small Round: 140, 145, 150, 155, 165, 170, 175, 180
• (2009->)HMF Optimizer: Electronic Fuel Injection Controller
• Trail Kit Includes: Basic Jet Kit and Uni Foam Filter
• Track Package Includes:Basic Jet Kit and a K&N Air Filter
• Competition Kit Includes: Basic Jet Kit, K&N Air Filter, and Outerwears Pre Filter