Kubota's 98-hp (73-kW) M100X and 107-hp (80-kW) M110X M Series tractors are powered by a Kubota V3800 3.8-L engine while on the larger side of the series, the 125-hp (93-kW) M126X and the 135-hp (100-kW) M135X feature a new V6108 four-cylinder, high-torque engine with a 6.1-L displacement. Both engines use waste gate turbochargers and common-rail injection systems for optimized combustion and thus improved fuel efficiency.
At 118 PTO hp (88 kW), the M135X offers increased competition for larger 110-120 hp (82-89 kW) agriculture tractors. An Intelli-Shift transmission features an eight-speed dual-range powershift for 16F/16R gears; hydraulic shuttle and wet main clutch are standard.
New design elements such as a rounded hood and grill design improve operator’s range of vision while the quieter cab keeps interior sound levels down to approximately 72 dBA on M126/135X models, and about 73 dBA on the M100X/M110X models. As part of the standard package, the exhaust pipe exits the hood at the bottom for increased visibility of the front right wheel; it is also tethered to the cab post to restrict vibrations and increase durability.
Some other standard design elements that contribute to improved traction and noise characteristics include wide front tread that provide an overall 70- to 74-in tread spacing. Kubota says that feature also enables easier straddling of wide windrows in baler applications. A float link has been added to the three-point hitch, which provides lateral floatation for the use of wide implements. Also available to improve the smoothness of the M135X, especially when equipped with a loader, is an optional front axle hydraulic suspension with a toggle switch to turn the system on and off.
New dashboard instrumentation on the M Series—which Kubota considers its "deluxe" midsized tractors—includes a central-command LCD panel that displays engine information, fuel used per hour, travel direction, and gear selection. The Kubota-Electronic Management System (K-EMS) electronic engine control system includes a computerized governor control dial that maintains engine revolutions per minute to the operator’s selection, while two memory settings can be set for low- and high-frequently used speeds.
One part of the K-EMS system, the new Work-Kruise control, monitors the engine to maintain a constant speed. For example, in hilly terrain Work-Kruise works with the Field Auto-Mode to optimize field travel speeds instead of the operator constantly having to maintain the throttle.
Complementing the M Series enhancements are the LA1953 and the LA2253 loaders. Each loader is configured with Kubota’s current two-lever quick-coupler system or the ISO Euro-coupler system. The LA1953 is performance matched to the M100X and the M110X and has a lifting capacity of 4300 lb (1950 kg), while the LA2253 is matched to the M126X and the M135X and has a lifting capacity of 4934 lb (2238 kg).