ROTAX KART ENGINES
125 Junior MAX EVO
Ages 12 to 14
The Junior MAX is for drivers 12 to 14, whether they’re moving up from Mini MAX or starting karting as a young teen. Junior is where drivers move onto a full-size chassis, but the engine doesn’t have to change with it. Micro, Mini, Junior, and Senior MAX share the same core engine, so drivers coming up from Mini upgrade the engine they already have, and a well-maintained, upgraded engine stays competitive. When it’s time for Senior MAX, that same engine moves up again. Junior MAX races at every level, from leisure and club racing to national and international competition.
The CIK-FIA approved Junior MAX delivers 23 horsepower through a single-speed, non-gearbox setup with a centrifugal clutch and electric start. That is a big step from Mini’s 13, and it is built for young drivers ready to take on national and international competition. Built for long engine life and straightforward maintenance, it keeps downtime and running costs down.
AGE
12-14 Years**
RACE CLASS
leisure/club/national or international
MAX PERFORMANCE
17 kW / 23 hp at 8,500 rpm
MAX TORQUE
19 Nm at 8,500 rpm
WEIGHT
bare engine: 11.8 kg / 26.0 lbs with complete power pack: 23.0 kg / 50.7 lbs
SPECIAL FEATURES
junior cylinder without exhaust valve
POWER PACK
intake silencer, carburetor, fuel pump, engine, exhaust system, radiator, battery box incl. cover, cable harness, OFF/ON/START switch, relay
CHASSIS COMPATIBILITY
wheel base 1,040 mm
FUEL REQUIREMENT
Minimum 91 Octane
Pump Fuel
OIL REQUIREMENT
XPS Kart-Tec fully synthetic 2-stroke
2% mix (50:1), about 2.6 oz per gallon
**Age limits can vary according to national regulations
Why Rotax?
Everyone who gets into karting eventually asks the same two questions: what is this really going to cost, and will I be able to keep up? The Rotax MAX platform was built around those questions.
It starts with one engine. Micro, Mini, Junior, and Senior MAX share the same core, so as a driver grows from a first race to senior competition, the engine grows with them through upgrades rather than replacements. Keep it maintained and it stays competitive, which puts the difference where it belongs: with the driver.
The same thinking runs through the rest of the engine. It runs on pump gas, not specialty race fuel, and needs only a 2% oil mix. It arrives as a complete package with the cooling system and electronics included, and it's backed by a 6-month factory warranty. It's built to go a long time between rebuilds, which means more weekends at the track and fewer in the shop.
Every engine is sealed and built to the same technical rules around the world, so the playing field stays level. A driver learning at a local club track is racing the same engine, under the same rules, as drivers from around the world at the Rotax MAX Challenge Grand Finals. The road from a first club race to international competition is already paved.
More time racing, less spent keeping up, and a clear path ahead for any driver willing to put in the work. That's the idea behind Rotax.
