YZ 490 Jet Kit

YZ 490 Jet Kit
YZ 490 Jet Kit
YZ 490 Jetting Kit Includes
  • YZ 490 Main Jets
  • YZ 490 Pilot Jet                                          
  • YZ 490 Needle Adjusters        
  • YZ 490 Nylon Needle Spacers
  • YZ 490 Slide Spring Modification
  • Drill Bits for
  • YZ 490 Slide Hole Modification (optional)
  • YZ 490 Idle Mixture Modification
  • YZ 490 Intake Airbox Modification
  • YZ 490 Exhaust Modification
  • YZ 490 Tuning Tech
  • YZ 490 Bike Specs
  • Carb Schematic
  • Carb Synchronizer Tool (how to build for $5)
  • Step by step instructions with photos for ease of installation.
  • Installation Support - If you need assistance we are there for you.

Please Select the Following Information

Stage 1-7
Air Filter Type
Exhaust Type
Altitude / Elevation Riding Range
Year, Make, & Exact Model
Other Mods, Brand of Exh/Int

    Please Include any more Information needed to Design your Jet Kit

This is a Custom Designed Performance Jet Kit.
We give a 100% Satisfaction Guarantee Refund on each Kit.
Fill out the information, and Engineering will design the kit per your specifications.