FAQ Evo 2017

Battery housing, cable harness, multi function switch

Q: Is it possible to update my evo engine with the 2017 specification battery housing and cable harness?
A: Yes, it is possible. The 2017 specification battery housing and cable harness will offer improved ease of use but will not provide any performance advantage.

Q: When updating to the 2017 specification battery housing and cable harness, do I also need a new electric starter.
A: No, just the electrical cable of the electric starter has to be replaced which will be offered by the Rotax sales-/service network.

Q: Is it mandatory to update my evo battery housing and cable harness to be able to compete at RMC events?
A: No, this is not mandatory. In the RMC technical regulations both versions will be legal to use.

Q: Why is the 2017 specification bracket system for the ignition coil different?
A: As the ECU is now included in the battery housing, the bracket system for the ignition coil and magnet valve has been minimized to maximize clearance at the back of the kart.  

Q: Can I use the old bracket system in combination with the 2017 specification battery housing and cable harness?
A: No, for the 2017 specification battery housing and cable harness you also have to use the 2017 specification bracket system for the ignition coil and magnet valve.

Q: Why doesn’t the 2017 specification cable harness have a ground connection for the ignition system anymore?
A: The 2017 specification cable harness has the ground connection for the ignition system integrated in the connection for the electric starter. This simplifies the installation of the cable harness.  

Q: Why does the 2017 specification use a different multi function switch?
A: The multi function switch is designed as a dip switch which is easy to fit to the battery housing and easy to connect to the cable harness by a plug in connection. The switch is also better protected against unintentional operation compared to the previous rotary switch.

Q: Does the 2017 specification cable harness also offer the possibility to select two different opening rpm’s for the exhaust valve?
A: Yes, by connecting the additional ground cable to mass.

Q: Where is the additional ground cable to select the opening timing of the exhaust valve located?
A: Either close to the battery minus pole or at the attachment of the starter relay.

Q: If I would like to update my actual evo battery housing/cable harness/multi function switch… to the 2017 specification, will there be a specific sales program?
A: No

ECU

Q: What is the technical advantage of the 2017 specification ECU’s?
A: A bigger main jet can be used which will improve the throttle response at low rpm and still enable the engine to reach rpm until the rev limiter set at 14,800 rpm.

Q: Will the improved ECU’s provide a better performance or lap time compared to the actual ECU’s?
A: No, the improved ECU’s will not have a positive or negative impact on the performance or lap time compared to the actual ECU’s.

Q: Why does the 2017 specification ECU’s have a rev limiter set at 14,800 rpm?
A: The improved throttle response at low rpm will enable a taller gear ratio for the best lap time. Exceeding 14,800 rpm would not provide an even better lap time.
On the other side the limited rpm supports the durability of all components.  

Q: Does the 2017 specification ECU for the 125 MAX have the same two different timings for the opening of the exhaust valve?
A: Yes.

Q: Is it possible to update an evo ECU with the 2017 specification ECU?
A: Yes, it is possible, but this will not provide a performance advantage. The 2017 specification ECU’s have been improved towards ease of carburetor set up only.

Q: Is it mandatory to update the ECU to the 2017 specification to be able to compete at RMC events?
A: No, this is not mandatory. In the RMC technical regulations both versions will be legal to be used.

Q: If I would like to update my actual ECU to the new ECU’s of Junior MAX and MAX, will there be a specific sales program?
A: Yes, for a limited period of time a trade in program will be offered.
“Return your actual Junior MAX or MAX ECU to your Rotax dealer and receive a new Junior ECU (Rotax part no. 666 813) or MAX ECU (Rotax part no. 666 815) with 50% discount on the regular retail price.
This offer is valid at all Rotax dealers participating in this trade in program – regarding the details please contact your Rotax dealer.  
 
NGK spark plug

Q: What are the technical advantages of the NGK spark plug?
A: The NGK spark plug is designed with a solid post connection for the spark plug cap which reduces the wear between spark plug and spark plug cap.
The NGK spark plug is mechanically very robust which minimizes the risk of spark plug failures.     
    One heat range will cover all conditions. This will simplify the engine set up for the customer.   

Q: Will the NGK spark plug provide a better performance or lap time compared to the Denso spark plug?
A: No, the NGK spark plug does not have a positive or negative impact on the performance or lap time.

Q: Which heat values of the NGK spark plug will be offered?
A: NGK GR8DI which is foreseen for engine specifications 125 Micro MAX and
125 Mini MAX.
NGK GR9DI which is foreseen for engine specifications 125 Junior MAX,
125 MAX and 125 MAX DD2.

Q: What is the standard spark plug gap of the NGK GR…DI spark plug?
A: The NGK GR…DI spark plug will be supplied with a spark plug gap from
0.7 to 0.8 mm.

Q: Is it mandatory to use the NGK GR…DI spark plug to compete in the RMC.
A: During a transition period the Denso and NGK spark plug will be legal to be used. As of 01.01.2018 latest, just the NGK GR…DI will be legal to be used for RMC races.
Please check the technical regulations of the RMC you would like to participate regarding the timing for this detail.  

Q: Can I use a NGK Iridium spark plug with a different specification than “GR…DI” at RMC races?   
A: No

Q: Will the NGK spark plug GR…DI be more expensive than the actual Denso IW spark plug?
A: No, the recommended retail price of the NGK GR..DI spark plug is less than the Denso IW spark plug.

Cylinder

Q: What are the technical changes on the Junior cylinder?
A: To assure equal performance of all cylinders an improved manufacturing technology (casting and fully CNC machined exhaust port and CNC machined central boost port) has been applied.

Q: Does the cylinder with improved manufacturing technology offer a better performance or better lap time?
A: The cylinder with improved manufacturing technology is competitive with the best performing cylinders already on the market.

Q: Will the Junior cylinder with the improved manufacturing technology also perform well in the engine specifications Micro MAX and Mini MAX.
A: Yes

Q: Can the existing cylinders still be used for RMC races?
A: Yes, in the RMC technical regulation both cylinders are allowed – please check your respective RMC technical regulations.

Q: Will the improved manufacturing technology also be applied for the MAX and DD2 cylinders.  
A: The MAX cylinder is still under investigation. The DD2 cylinder will stay unchanged.

Q: If I would like to purchase a new Junior cylinder with improved manufacturing technology, will there be a specific sales program?
A: Yes, for a limited period of time a trade in program will be offered.
“Return your actual Junior cylinder to your Rotax dealer and receive a new Junior cylinder with improved manufacturing technology (Rotax part no. 223 991) with 50% discount on the regular retail price.
This offer is valid at all Rotax dealers participating in this trade in program – regarding the details please contact your Rotax dealer.

Engines specification 2017

Q: How much will the retail price for engines with the 2017 engine specifications change?
A: The average price increase will be approx. 2.5%. For pricing details please contact your Rotax dealer.