The basic specifications of the TM 250 MX were changed very little to create the EN. But the changes are important ones, and would be very expensive to engineer yourself. The internal engine specs are all MX, but a different pipe and a change from a Keihin PWM to a PWK carburetor smooth power delivery for off-road use. The ignition has provisions for powering a headlight and taillight, and mass added to the crank gives a bit more flywheel effect. The middle three transmission gears are the same as on the MX bike, but first is a bit lower and fifth is much taller. Naturally, there is an 18-inch rear wheel for flat-tire prevention and a kickstand for convenience. Fuel capacity remains 2.3 gallons, but the EN’s tank is natural in color so you can see when you’re running low.