Thumpstar TSK 90-S4 90cc Semi-Auto Kids Dirt Bike-Ride Away

The Perfect Step Up for Young Riders

The Thumpstar TSK 90-S4 is designed for young riders who are ready to progress beyond a 50cc bike. Powered by a reliable 90cc 4-stroke engine, this model delivers smooth, predictable power while remaining easy to ride thanks to its 4-speed semi-automatic transmission—no clutch operation required.

Featuring electric and kick start, hydraulic disc brakes, inverted front forks, and Thumpstar's durable wrap-around frame, the TSK 90-S4 is built to provide years of reliable off-road fun.

Whether it's riding around the farm, on private property, or at the local motocross practice track, the TSK 90-S4 offers excellent performance and outstanding value.

Key Features

• ✅ Reliable 90cc Air-Cooled 4-Stroke Engine
• ✅ Semi-Automatic 4-Speed Gearbox (N-1-2-3-4)
• ✅ Electric & Kick Start
• ✅ Hydraulic Front & Rear Disc Brakes
• ✅ Inverted Front Forks
• ✅ Rear Mono Shock Suspension
• ✅ Heavy-Duty Wrap Around Frame
• ✅ Waterproof Electrical Wiring
• ✅ Pipe Bomb Performance Muffler
• ✅ Safety Kill Switch & Emergency Lanyard
• ✅ Tough Steel Rims with Off-Road Tyres

Specifications

Engine & Transmission

• Engine: Air-Cooled 4-Stroke
• Capacity: 90cc
• Carburettor: PZ 19mm
• Transmission: Semi-Automatic 4-Speed (N1234)
• Starting: Electric & Kick Start
• Final Drive: 420 Chain
• Top Speed: Up to 45km/h (depending on gearing)

Suspension

• Front Suspension: Inverted Forks (600mm)
• Rear Suspension: Non-Adjustable Mono Shock (280mm)

Brakes

• Front: Hydraulic Disc Brake
• Rear: Hydraulic Disc Brake

Wheels

• Front Wheel: Steel Rim 1.40-12
• Rear Wheel: Steel Rim 1.85-10

Dimensions

• Wheelbase: 1120mm (44")
• Seat Height: 580mm (23")
• Fuel Tank Capacity: 3 Litres
• Dry Weight: 50kg

Why Choose the Thumpstar TSK 90-S4?

The TSK 90-S4 is an excellent choice for riders who have outgrown their first mini bike but aren't quite ready for a manual clutch motorcycle. The semi-automatic gearbox makes learning gear changes simple while the larger chassis and dependable 90cc engine provide the confidence to keep improving.

With quality components, reliable performance, and the backing of the trusted Thumpstar brand, the TSK 90-S4 is built for years of off-road adventure.

Ride Away Pricing

Please Note:

• All advertised prices are Ride Away prices.
• Your motorcycle will be assembled, pre-delivery inspected and ready to ride upon collection.
• In-store pickup only.
• If you require freight, please contact CQ Motorcycles before purchasing for a transport quote. 

Safety Information

• Designed for off-road use only.
• Always wear an approved helmet and appropriate riding safety gear.
• Adult supervision is recommended for young riders.
• Riders should always operate the motorcycle in a safe and controlled environment.