Force Motorsport is an authorised J.A.G. Rotax service dealer. As authorised service agents we offer full range of support for all Rotax kart engines from Senior Max to Junior, Inter aka Mini Max and Micro Max kart race engines. Our service includes kart engine preparation, service, rental and dyno testing for the Rotax Max product range.
Rotax have been making engines for over 90-years, starting in karting in the 1980’s. The 125 MAX engine to covers almost the entire age group for karting – from the entrance level to the top level of karting. With minor upgrades, the Micro Max can be converted to an Inter aka Mini Max, Junior Max and even a Senior Max – a concept that offers the owner one engine for an entire kart racing career. Rotax Max engine is still very popular with large grids at local, national and international level.


Rotax Micro Max EVO Kart Race Engine Technical Specification
The engine with its 9.5 hp and good torque forgives driving mistakes and is therefore perfect for the youngest to gain their first experiences in karting. Only the fuel capacity will stop you from continuing karting. The engine was launched in 2007 as has the following specification:
- All spares are available to buy
- Maximum Performance: 7 kW / 9.5 hp at 7.000 rpm
- Maximum Torque: 10.9 Nm at 6.000 rpm
- Special Features: Junior cylinder without exhaust valve, restricted exhaust socket, radiator and exhaust that fit special cadet chassis
- Power Pack: intake silencer, carburettor, fuel pump, engine, exhaust system, radiator, battery box incl. cover, cable harness, OFF/ON/START switch, relay
If you are ordering a new Rotax Max kart engine with Force Motorsport, it will come delivered with seals on the crankcases and cylinder and will also include a log book.
Rotax Inter aka Mini Max EVO Kart Race Engine Technical Specification
This engine is the logical next step after the 125 Micro MAX evo engine with increased performance to 13 hp. It is perfect for kids with kart racing experience as well as for beginners and leisure usage.
The engine was launched in 2004 and has the following specification:
- All spares are available to buy
- Maximum Performance: 9.6 kW / 13 hp at 7.500 rpm
- Maximum Torque: 13 Nm at 6.000 rpm
- Special Features: Junior cylinder without exhaust valve,
restricted exhaust socket. - Power Pack: intake silencer, carburettor, fuel pump, engine, exhaust system, radiator, battery box incl. cover, cable harness, OFF/ON/START switch, relay
If you are ordering a new Rotax Max kart engine with Force Motorsport, it will come delivered with seals on the crankcases and cylinder and will also include a log book.

Rotax Junior Max EVO Kart Race Engine Technical Specification
More performance and perfect for juniors with karting experience. With the 125 Junior MAX evo engine, you can have your first international racing experience. The engine was launched in 2000 and has the following specification:
- All spares are available to buy
- Maximum Performance: 17 kW / 23 hp at 8.500 rpm
- Maximum Torque: 19 Nm at 8.500 rpm
- Special Features: Junior cylinder without exhaust valve
- Power Pack: intake silencer, carburettor, fuel pump, engine, exhaust system, radiator, battery box incl. cover, cable harness, OFF/ON/START switch, relay
If you are ordering a new Rotax Max kart engine with Force Motorsport, it will come delivered with seals on the crankcases and cylinder and will also include a log book.
Rotax Senior Max EVO Kart Race Engine Technical Specification
Designed for people with kart racing experience as well as for beginners and leisure usage. Top level performance of the non-gearbox class. The engine was launched in 1997 and has the following specification:
- All spares are available to buy
- Maximum Performance: 22 kW / 30 hp at 11.500 rpm
- Maximum Torque: 21 Nm at 9.000 rpm
- Special Features: Cylinder with electronically controlled exhaust valve
- Power Pack: Intake silencer, carburettor, fuel pump, engine, exhaust system, radiator, battery box incl. cover, cable harness, OFF/ON/START switch, relay
If you are ordering a new Rotax Max kart engine with Force Motorsport, it will come delivered with seals on the crankcases and cylinder and will also include a log book.

Frequently Asked Questions
Yes – our engines have won multiple championships and race wins. We are an approved J.A.G. Rotax service centre, so can prepare you Rotax engine and replace the seals to keep your engine legal.
Yes – we have a direct relationship with the manufacturers, so you can buy your new kart engine through us. We’ll take delivery of your engine and immediately put in on the dyno to review performance changes we can make to give you a race winning engine.
Yes – as well as selling new or used engines we also rent them. You get the same high performance engine from Force Motorsport, whether you buy or rent the engine from us.
