This will fix the problematic cold starting of the the EX250 Ninja. You will no longer need to keep the choke on for extended periods of time, just to have the bike feel slow, and die. It will start right up and run with no hesitation and sputtering with poor throttle response while it is trying to warm up.

Includes:

Pilot Jets

Needle Adjusters

Step by step instructions with photos

Drill Bit for

Idle Mixture Mod

Removal Screw