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Rotax EVO Engine Package

Brand: Kart
Rotax EVO Engine Package
Rotax EVO Engine Package

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Micro Max
Mini Max
Junior Max
Senior Max
DD2 Max
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Rotax 125 MAX EVO Engine Concept


Data Sheet


Data Sheet


Data Sheet


Data Sheet


Data Sheet



The Rotax 125 MAX evo engines will be legal for use in the United States starting March 30, 2015.
The Rotax 125 MAX evo engines will be legal for use in the United States starting March 30, 2015. - See more at: http://gorotax.com/news/196-maxspeed-group-announces-new-rotax-125-max-evo-engines-now-in-stock.html#sthash.FZVMyfgG.dpuf
The Rotax 125 MAX evo engines will be legal for use in the United States starting March 30, 2015. - See more at: http://gorotax.com/news/196-maxspeed-group-announces-new-rotax-125-max-evo-engines-now-in-stock.html#sthash.FZVMyfgG.dpuf

Rotax Engines have a long history of quality and ease of use. The Rotax 125 MAX evo karting engine series is no different. The evolution of the Rotax concept, from the fastest engine package (the DD2, 2-speed) to the most entry level package, the Micro MAX, designed for ages 8-10 years old.
The Rotax 125 MAX evo engines will be legal for use in the United States starting March 30, 2015. - See more at: http://gorotax.com/news/196-maxspeed-group-announces-new-rotax-125-max-evo-engines-now-in-stock.html#sthash.FZVMyfgG.dpuf

The evolution of engines utilizes the basis of the Rotax 125 MAX evo in various trim packages so that it is conceivable to start in Micro MAX and keep your same engine throughout your karting career. How is that for cost-effective? In addition, the sealed-engine concept and engine passport system keeps a level playing field while providing you a service log of each engine you own or compete against. A complete engine service history means you have an engine that will retain its value over the years.

The Rotax 125 MAX evo engine series combines the proven Rotax MAX engines evolution concept and the latest technology in karting. With its advanced engine technology, the new engine series is easy to use, offers equal opportunities for all drivers and lower operating costs due to its improved durability. Thanks to its optimized performance characteristics and ease of use, you will have more fun on the track.

Details of the new Rotax EVO package include:

New Dellorto VHSB34 XS carburetor
The XS carburetor is a completely redesigned system, which offers a significantly improved throttle response and requires less need to adjust calibration under changing conditions.

Customer benefits:
  • Supports ease of use of the whole engine package improve driving experience.
  • Less support of carburetor experts needed to get appropriate carburetion.
  • Lower cost of operation.

New Dellorto ignition system

To integrate the electronic timing for the exhaust valve into the ignition system, a new system (Dellorto) with separate ignition coil (same for all engines) and a specific electronic box for each engine, has been developed.

The ignition timing of the 125 Micro MAX evo, 125 Mini MAX evo, and 125 MAX evo engines remain the same as the current engines; therefore, these 3 engines use the same Dellorto electronic box.

The ignition timing of the 125 Junior MAX evo engine has been changed to improve the engine characteristic in the rpm range from 12.000 to 14.000 rpm.

The ignition timing of the 125 MAX DD2 evo engine has been changed to minimize the risk of misfiring at critical engine operation.

Customer benefits:
  • Improved engine characteristic for 125 Junior MAX evo ease of use
  • Reduced risk of misfiring for 125 MAX DD2 evo increased durability.
  • Integrated timing for exhaust valve for 125 MAX evo and 125 MAX DD2.

Electronic timed exhaust valve
Electronic timed exhaust valve with exact timing, independent from engine.
Two different switch points can be selected to allow adaption to individual driving preferences.

Customer benefits:
  • Automatically and exact timing of exhaust valve for 125 MAX evo and 125 MAX DD2 evo.
  • Less technical assistance required for proper function of the system lower cost of operation.

New battery holder unit with integrated combination-switch (OFF/ON/START)

Customer benefits:
  •  Easy to install and operate.
  • Improved durability of combination of OFF/ON/START-switch and starter relay
  • Lower cost of operation

New exhaust systems (125 Mini MAX evo, 125 Junior MAX evo, 125 MAX evo and 125 MAX DD2 evo)
New design with separate tuned pipe and silencer, which provides improved durability, lower noise emissions and slightly lower weight.

Customer benefits:
  • Increased durability lower cost of operation.
  • Lower noise emissions.
  • Slightly lower weight compared to current exhaust system.

New exhaust sockets with gasket ring
New system provides accurate sealing between the exhaust socket and the exhaust system, which is essential for the proper performance of the engine.

Customer benefits:
  • No leaking between exhaust socket and exhaust system clean.
  • Proper engine performance.

New piston
The changed profile of the piston enables a reduced running in period and provides at the same time a reduced wear rate.

Customer benefits:
  • Shorter running in period.
  • Lower wear rate lower cost of operation.

New connecting rod
New hardening procedure enables a new lightweight design with two lubrication slots.

Improved lubrication and lower weight result in improved durability.

Customer benefits:
  • Improved durability lower operating cost.

Optimized crankshaft
Sliding seats for the main bearings provide a free turning crankshaft right at the first start of the engine.

Customer benefits:
  • No need to free-up new engines lower cost of operation.
  • Optimum engine performance out of the box.

Engine appearance
Black coating of crankcases and gearbox covers as well as red coating of the cylinder head cover support the racing look of the engine package.

Customer benefits:
  • New appearance supports the racing image of the product.

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