The MotoTec X4 150cc is a full-size, manual-clutch dirt bike for riders ready to move up to a real shifting experience. Its 150cc, air-cooled, 4-stroke engine makes 8.6hp at 8,500 rpm through a 5-speed manual gearbox with a wet multi-plate clutch, and a central-tube, high-strength steel frame carries the load. The 19-inch front and 16-inch rear aluminum rims give it the big-bike stance, and the seat sits 35 inches off the ground.
Starting and control
Press the button for electric start from the 12V battery, or use the kick-start as a backup if the battery is ever flat. You change gears with the clutch lever in the standard 1-N-2-3-4-5 pattern, so the bike teaches proper clutch and shift technique.
Suspension and brakes
Adjustable inverted hydraulic forks give 180 mm (7.1 in) of travel up front, with a rear shock giving 90 mm (3.5 in). A dual-piston 240 mm front disc and a single-piston 240 mm rear disc handle stopping.
Who it’s for
The X4 is recommended for riders 16 and older, with a maximum rider weight of 220 lbs. It measures 76 × 32 × 47 inches and weighs 231 lbs dry, so it is easier to handle than a full-size 250. If you are learning to shift, see our dirt bike range for smaller 4-speed options.
Prime Bike Parts tests its products before they ship, and we ship securely to almost all countries. Contact us if you have questions about fit, assembly or options before you order.
Safety first: always wear a helmet and protective gear, and check the rules where you plan to ride.
| Brand / model | MotoTec X4 150cc |
|---|---|
| Engine | 150cc, 4-stroke, single cylinder, air-cooled (CB150D), 144.6 cc displacement |
| Max power | 8.6hp @ 8,500 rpm |
| Max torque | 7.37 lb-ft @ 7,500 rpm |
| Compression ratio | 9.2:1 |
| Transmission | 5-speed manual, wet multi-plate clutch with lever (1-N-2-3-4-5) |
| Starting | Electric start and kick start (12V battery) |
| Carburetor | Nibbi PE28J |
| Final drive | #520 chain |
| Engine oil | SAE 10W-40 |
| Fuel tank | 6.5 L (1.72 gal) |
| Frame | Central-tube, high-strength steel |
| Front forks | Adjustable inverted hydraulic, 180 mm (7.1 in) travel |
| Rear shock | Non-adjustable, 90 mm (3.5 in) travel |
| Rims | Aluminum gravity cast, 1.6×19 front / 2.15×16 rear |
| Tires | 80/100-19 front / 100/90-16 rear |
| Front brake | Dual-piston, 240 mm disc |
| Rear brake | Single-piston, 240 mm disc |
| Seat height | 35 in |
| Ground clearance | 315 mm (12.4 in) |
| Wheelbase | 1,320 mm (52.0 in) |
| Dimensions (L × W × H) | 76 × 32 × 47 in |
| Dry weight | 231 lbs |
| Max rider weight | 220 lbs |
| Recommended age | 16 and older |
| Listed top speed | 56 mph, with adjustable speed limiter |
| Shipping box | 67 × 18 × 34 in, 298 lbs |
















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