KLX300: Featured Products

The EJK evolved out of the need to address the ever-increasing complexity of factory fuel injection. For the newcomer to the market or professionals wanting an easier method for tuning fuel injection, the EJK is a customizable solution for the rider that wants to take control of their tuning needs.

This unit is a piggy-back EFI controller because it does not replace the stock ECU, but rather monitors the signals to the injectors and makes fuel adjustments based on the mode settings. The GEN 3 has a push button interface allowing access up to 6 different modes to allow for quick fine tuning by the end user without needing a computer.

Key Features:

• No computer or dyno needed!
• Plug and play, simple to install, base settings preset
• Unique load based technology
• Full range tunability available
• Does NOT interfere with stock ECU operation
• Simple push button adjustment interface
• Water-resistant 
• 2-Year warranty
• Compact size - 2.2" H x 3.4" W x 0.5" D

• Made from strong and lightweight aircraft aluminum
• Protects vital engine parts from rocks and debris
• Custom fit to your specific bike model
• Oil drain hole for easy access
• All mounting hardware included

Since Kawasaki brought back the popular little KLX250 with updated fuel injection, Yoshimura brought back an updated RS-2 slip-on that now incorporates an o2 sensor that accommodates the new fuel injection technology on the KLX. All of that with added power, torque and that distinct Yoshimura exhaust note.

Entire unit is proudly made in the good old US of A to boot!

• Diamond-shaped sleeve
• Large core and increased muffler packing volume means quieter operation
• Stainless steel cone end-cap
• Stainless steel tail-pipe
• 2.8 lbs. lighter over stock unit.
• Comes with USFS Approved Spark Arrestor

The product that you are purchasing is designed and intended for closed course competition use only and is labeled as such, i.e. Yoshimura "RACE SERIES." Yoshimura RACE SERIES products are neither designed nor intended for use on PUBLIC ROADS or LAND. Such use is prohibited by Federal and State regulations.

Unlock your KLX300's hidden power potential with this proven airbox modification using the KDX200 high flow snorkel. This popular performance upgrade replaces your bike's restrictive stock air intake snorkel to dramatically improve airflow and breathing, helping your KLX300 produce more horsepower and torque. 

Easy to install and widely recommended by the KLX300 community, this airbox mod is an essential first step for riders looking to increase power, improve throttle response, and enhance overall engine performance. 

Perfect for pairing with exhaust upgrades and ECU tuning, the KDX220 snorkel delivers noticeable gains while maintaining reliable filtration - making it a must-have modification for any KLX300 owner seeking affordable horsepower improvements and better engine breathing. This famous airbox mod works on the KLX250 as well.