A bigger, stronger dirt bike in the X series for a 16 and up rider who wants a 5-speed manual gearbox and higher spec suspension.
The X4 runs a 150cc 4-stroke, air cooled engine making 8.6 hp through a 5-speed manual wet multi-plate transmission with a clutch lever, plus electric and kick start. It steps up to 19 inch front and 16 inch rear wheels, an inverted hydraulic adjustable front fork with 180mm of travel, and dual piston front and single piston rear disc brakes, reaching a 56 mph top speed limited by an adjustable speed limiter with 60 miles of cruising range per tank. Built for off-road riding, not for public roads.
Why this model
- 5-speed manual transmission with a clutch lever gives finer control than the 4-speed X2 and X3.
- Inverted hydraulic adjustable front forks with 180mm of travel absorb bigger hits than the non adjustable forks on smaller X series bikes.
- Dual piston front disc brake adds stopping power over the single piston setup on the smaller models.
- Adjustable speed limiter caps the 56 mph top speed as riders build experience.
- Larger 19 inch front and 16 inch rear wheels roll over rough terrain more easily than smaller wheels.
Key specs
| Motor |
150cc 4-stroke single cylinder, air cooled, 8.6 hp @ 8500 rpm |
| Top speed |
56 mph (with adjustable speed limiter) |
| Brakes |
Front dual piston disc, rear single piston disc |
| Suspension |
Front inverted hydraulic adjustable fork (180mm travel), rear non-adjustable shock (90mm travel) |
| Tires |
Front 80/100-19 (19 in), rear 100/90-16 (16 in) |
| Frame |
Central tube, high strength steel |
| Seat height |
35 in |
| Max rider weight |
220 lbs |
| Recommended age |
16 and up |
| Weight |
231 lbs (dry) |
| Assembly |
Required |
Fit, power and setup
Some assembly is required out of the box, and it ships in one box weighing 298 lbs, so expect a freight style curbside delivery with a scheduling call from the carrier. It runs a 6.5 liter (1.72 gallon) fuel tank with SAE 10W/40 engine oil, seasonal grades noted by MotoTec. This bike is built for dirt, grass, and off road trails, wet or dry, not pavement.
Good to know
- Recommended for riders 16 and up, with a 220 pound weight limit.
- The 5-speed manual gearbox and clutch lever suit a rider comfortable shifting on a dirt bike already.
- Off road use only. Not street legal and cannot be registered for road use.
- Wear a helmet and protective gear. Riders under 18 need adult supervision.
MotoTec states this bike is EPA approved but it does not meet California emissions standards, so it is for competition or off road use only and cannot be registered for street or OHRV use or with the California DMV. Check your state and local regulations before you buy. It ships by freight due to its weight, with curbside delivery and a scheduling call from the carrier, and it carries 60 days of parts replacement coverage from MotoTec.
