Motocross Bikes for sale in Thornton, Colorado

2015 Suzuki RM-Z250 250

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Thornton, Colorado

2015 Suzuki RM-Z250, The 2015 RM-Z250 contains all the necessary components for a championship bike. Class-leading handling aided by the Showa Separate Function front Fork, combined with a substantial four-stroke engine, the RM-Z will suffice for any rider looking to carve up the track and win!

Trim 250

2015 Suzuki RM-Z450 450

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Thornton, Colorado

2015 Suzuki RM-Z450, The RM-Z450 continues to evolve for 2015, delivering a higher level of performance while maintaining the great balance of the current model. The 449 cc 4-stroke liquid-cooled DOHC 4-valve fuel-injected engine along with new performance upgrades straight from the factory is the reason why champions choose Suzuki!

Trim 450

2015 Yamaha YZ450F

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Thornton, Colorado

2015 Yamaha YZ450F, A WINNER RIGHT OUT OF THE CRATE.Completely re-engineered just last year with new EFI engine, and entirely new frame, minimized body work and new suspension components providing for excellent mass centralization and class leading 450 power with 250-style handling.The critics agree: the YZ450F is the one to beat.Standard Features May Include:YZ450F’s revolutionary rearward-slanted-cylinder design is an innovative approach to achieve unmatched mass centralization. Concentrating the motorcycle’s heaviest components (engine mass, fuel tank, exhaust system, and airbox) toward the center of the machine, as well as the rotational mass of the valve train, helps achieve superior, nimble handling.The 4-titanium-valve cylinder head is matched to a fuel injection system that provides superb power feeling across the rpm range. The adjustable fuel injection system uses a 44mm throttle body fed by a high pressure battery-less electric pump to ensure optimum fuel atomization and air/fuel calibration for a wide range of riding conditions. The YZ450F instantly adapts to changing air/fuel mixtures depending on altitude and temperature, for an engine that delivers no matter what conditions.Industry-leading suspension with refinements to internal and external components and settings result in superior handling.Stiffer fork springs, new valving and a new fork outer tube improve performance in the mid-to-end stroke and aid fork bottoming resistance.Quick-release quarter-turn Dzus® air box fasteners for tool-less access to the air filter.New Dunlop® MX52 tires offer excellent traction front and rear, especially on hard surfaces.The high-performance ECU provides great bottom end torque plus delivers a strong feeling of power from 3rd gear up while the gear ratios lengthen the powerband and heighten the feeling of power in 2nd and 3rd gear.The exhaust pipe has an innovative layout, circling the cylinder, giving the exhaust pipe proper length for an excellent exhaust-pulse effect. At the same time, the exhaust pipe has three different diameters throughout the exhaust tract, bringing out excellent power characteristics. This layout allows the silencer to be behind the side panel closer to the middle of the bike which centralizes the mass for superior handling.The aluminum muffler is positioned closer to the machine’s center of gravity as it is almost completely hidden by the side number plate. The layout allows a shorter, lighter sub frame and also contributes to mass centralization for lightweight handling feel.The large diameter 22mm front axle and top triple clamp provide rigidity for unmatched handling and front end feel. The handlebar mounts are rubber mounted to improve comfort and reduce handlebar vibration.

2015 Yamaha YZ250 F

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Thornton, Colorado

2015 Yamaha YZ250 F, BIKE OF THE YEAR.Awarded Dirt Rider's prestigious ''Bike of the Year'' and the 250 bike of choice by the majority of MX critics and experts, the YZ250F features a powerful EFI engine, light weight chassis, superior mass centralization and class-leading suspension components for improved high RPM power with truly instinctive handling.Standard Features May Include:Liquid-cooled, DOHC 4-valve, fuel-injected engine with the same forward-positioned, straight intake, rear-inclined cylinder, and rear-positioned exhaust layout as the YZ450F.The 4-titanium-valve cylinder head is matched to a fuel injection system that provides power at mid-to-high rpm. The fuel injection system instantly adjusts the air/fuel mixtures depending on altitude and temperature, for a hesitation-free engine that delivers no matter the conditions.The aluminum Bilateral Beam frame offers a superb rigidity balance and provides unmatched lightweight handling.The exhaust pipe has an innovative layout, circling the cylinder, giving the exhaust pipe proper length for an excellent exhaust pulse effect. At the same time, the exhaust pipe has three different diameters throughout the exhaust tract, bringing out excellent power characteristics. This layout allows the silencer behind the side panel, making it closer to the middle of the bike for centralized mass for superior handling.The layout of the seat, fuel tank, air box, and wrap-around exhaust system moves the bike’s mass towards the center for exceptional handling. The front intake layout with large air filter element adds the benefit of reduced air filter maintenance due to its positioning away from dirt roost from the rear wheel.Accessory GYTR® Power Tuner lets owners adjust air/fuel mixture and ignition timing maps to match engine performance characteristics to the rider and track conditions in a matter of seconds with the push of a few buttons.The adjustable fuel injection system uses a 44mm throttle body fed by a high-pressure battery-less electric fuel pump. This ensures optimum fuel atomization and air/fuel calibration for excellent rideability in a wide range of riding conditions. The system controls the volume of fuel injected and the ignition timing based on engine rpm and throttle opening, providing hesitation-free response and controllability.The compact wet sump lubrication system with piston cooler spray jet maintains excellent engine durability and eliminates the need for an oil tank, which lowers engine weight. This creates a more compact engine that contributes to mass centralization and unmatched handling.The large diameter 22mm front axle and top triple clamp increases rigidity for excellent handling and front end feel. The handlebar mounts are rubber mounted to improve comfort and reduce handlebar vibration.The air filter is positioned away from the rear wheel which means less maintenance for the rider.

2015 Suzuki RM-Z250

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Thornton, Colorado

2015 Suzuki RM-Z250, The 2015 RM-Z250 contains all the necessary components for a championship bike. Class-leading handling aided by the Showa Separate Function front Fork, combined with a substantial four-stroke engine, the RM-Z will suffice for any rider looking to carve up the track and win!

2015 Yamaha YZ250

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Thornton, Colorado

2015 Yamaha YZ250, THE INDUSTRY BENCHMARK.The YZ250 is the standard by which every other 250 cc 2-stroke motocross bike wishes they could live up to.With giggle inducing power, unbelievable lightweight handling and legendary Yamaha durability. Plus, that 2-stroke simplicity means low cost maintenance!Standard Features May Include:Modern, aggressive styling, including new front fender, front number plate, radiator shrouds, side number plates, air box, rear fender, fork guards, as well as some technical changes to the rear sprocket, rear brake disc protector, and rear brake caliper protector and wider foot pegs just like the 4 strokes.A light aluminum frame housing a patented YPVS™ Power valve-equipped ripper of an engine results in an awesome power-to-weight ratio.The YZ250 is ready to race out of the crate, complete with an aluminum handlebar, titanium foot pegs, gripper seat, and Excel® rims.The latest-generation KYB® Speed-Sensitive fork, just like the 4-stroke machines, has been added and provides industry-leading performance.A clutch lever position adjuster is adopted to allow adjustments based on rider preferences and accommodates differing hand sizes.The latest Dunlop MX52® tires are used for the best off-road traction, performance reliability.249cc liquid-cooled reed-valve-inducted two-stroke engine is lightweight, compact, and features an incredibly wide, hard-hitting powerband.Patented YPVS power-valve system combines crisp, hard-hitting, bottom-end acceleration with strong midrange and eye-opening top-end.Digital CDI ignition system delivers precise spark for faster, stronger response anywhere in the powerband.Special-design "gripper" type seat and fuel tank aluminum handlebars in an adjustable top clamp create greater freedom of movement and more comfortable ergonomics for riders.

2015 Yamaha YZ85

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Thornton, Colorado

2015 Yamaha YZ85, THE MINI RACER OF CHOICE FOR FUTURE CHAMPS.The YZ85 is ready to race and features a high performance, 2-stroke engine for instant power and legendary Yamaha durability. Plus, that 2-stroke simplicity means low cost maintenance!Standard Features May Include:All-new aggressive styling for 2015 with a new front fender, number plate, radiator shroud and side number plates.Clutch lever reach adjuster to accommodate smaller hands for younger riders.Liquid-cooled, 85cc crankcase reed-valve-inducted six-speed is light, compact and designed to deliver hard-hitting, moto-winning power throughout the rpm range.Smooth-shifting, six-speed close-ratio transmission with heavy-duty, multiplate clutch delivers maximum hookup for outstanding acceleration and corner-exiting power.Ultra-rigid, single-backbone, semi-double-cradle frame is lightweight and strong for sharp handling.Fully adjustable suspension allows a broad adjustment range to suit everybody from rank novice to mini expert.Enhanced styling for a new front fender, front number plate, radiator shroud and side number plates. New coloring on the triple clamps and handlebars mimics the styling of the big YZs.Clutch lever reach adjuster added to accommodate rider preferences and varying hand sizes.85cc liquid-cooled, crankcase reed-valve-inducted, two-stroke engine inhales through a 28mm Keihin® flat-slide carburetor; seamless throttle response across the powerband is the result.

2015 Suzuki RM85

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Thornton, Colorado

2015 SUZUKI RM85, The RM85 is back and its here to carry on the powerful tradition of racing excellence in the Suzuki RM family. Its two-stroke engine produces smooth power at any rpm with an emphasis on low- to mid-range performance. Just like its bigger brothers, the RM85 delivers class-leading handling for experienced racers and rookie riders alike. With its smooth power delivery and loads of mid-range and lightweight handling, the 2015 RM85 is the perfect motocross bike for anyone learning to race - and to win!

2015 Yamaha YZ125

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Thornton, Colorado

2015 Yamaha YZ125, THE LEGEND CONTINUES.The YZ125 is the perfect transition from a YZ85 to a YZ250F. One ride and you will be amazed at the light handling and the simple fun the YZ125 provides. Plus, that 2-stroke simplicity means low cost maintenance ... a win-win for all the true moto fans out there.Standard Features May Include:Modern, aggressive styling, including new front fender, front number plate, radiator shrouds, side number plates, air box, rear fender, fork guards, as well as some technical changes to the rear sprocket, rear brake disc protector, and rear brake caliper protector and wider foot pegs just like the 4 strokes.A light aluminum frame housing an amazingly light and compact engine results in an awesome power-to-weight ratio.The YZ125 is ready to race out of the crate, complete with an aluminum handlebar, titanium foot pegs, and gripper seat.A pure motocross machine, the light and nimble YZ125 is the perfect choice for riders stepping up from the 85cc class.Ultra lightweight means nimble handling with less fatigue.Modern, aggressive new styling for 2015 looks awesome.The latest generator KYB® Speed-Sensitive fork just like the 4-stroke machines has been added and provides industry leading performance.A clutch lever position adjuster is adopted to allow adjustments based on rider preferences and accommodates differing hand sizes.The latest Dunlop MX52® tires are used for the best off-road traction, performance and reliability.Patented YPVSTM power-valve system combines crisp, hard-hitting bottom-end acceleration with strong midrange and eye-opening top-end.