YFM 250 Moto 4 Jet Kit

YFM 250 Moto 4 Jet Kit
YFM 250 Moto 4 Jet Kit
YFM 250 Moto 4 Jetting Kit Includes
  • Main Jets
  • Needle Adjusters
  • Nylon Spacers
  • Drill Bits for
  • Slide Hole Mod (some models)
  • Idle Mixture Mod
  • Bike Specs
  • Carb Schematic
  • Carb Synchronizer Tool (how to build for $5)
  • Step by step instructions with photos customized to your bike.
  • Installation Support - If you need assistance with installation or have a question 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.