OEM part required 2 classes
The original ECU must stay and may only be reprogrammed, with no additional input, output or sensor, so an aftermarket or standalone box is not legal here.
- Runabout GP2 · Y.4.1
- Runabout GP3 · Z.6.1
IHRA · Ignition
Aftermarket or standalone ECU
IHRA answers this part for 29 of its classes. 14 of those answers are permissions, with or without limits attached, and 15 are not. 6 are inferred from how the class is written rather than quoted from a rule naming this part.
Where it stands, class by class
29 classes, grouped by the answer rather than listed one by one, because an answer that holds for a class usually holds for every class that borrows its rules.
Not permitted, not listed in the rules Our reading, not a rule we can quote at you. This class requires the craft to stay stock except where the rules allow otherwise, and this part is not on the list.
No rule, this is an open class Our reading, not a rule we can quote at you. This class carries no stock clause at all, so anything unlisted appears to be open. The rulebook does not say so in terms.
OEM part required 2 classes
The original ECU must stay and may only be reprogrammed, on its original connections, with no input, output or sensor added, so an aftermarket or standalone box is not legal here.
- Ski 1100 Modified · R.4.1
- Ski 1500 Modified · Q.4.1
OEM part required 1 class
The original ECU must stay and may only be reprogrammed, though sensors for air fuel ratio, exhaust gas temperature and detonation are permitted for data logging, and an aftermarket or standalone box is not legal here. · W.4.1
OEM part required 1 class
The original ECU must stay and may only be reprogrammed, on its original connectors, with no sensor added, so an aftermarket or standalone box is not legal here. · AA.4.1
OEM part required 1 class
The original ECU must stay and may only be reprogrammed, keeping the same input and output count, with no sensor added, so an aftermarket or standalone box is not legal here. · N.4.1
OEM part required 1 class
The original ECU must stay and may only be reprogrammed, on its own inputs, outputs and connectors, with no sensor added, so an aftermarket or standalone box is not legal here. · L.4.1
OEM part required 1 class
On four-stroke entries the original ECU must stay and may only be reprogrammed, with no additional input or output, so an aftermarket or standalone box is not legal here. · BB.7.1
Not permitted, not listed in the rules 4 classes
On a closed list an unlisted modification is not permitted. · A.2.2, J.1
Legal, within limits 1 class
No additional sensors. · O.4.1
Legal, within limits 1 class
No additional inputs, outputs or sensors, and original factory connections. · M.5
Legal, within limits 1 class
Must not exceed OEM capabilities. Original connectors. No added sensors or inputs. · T.4.1
Legal, within limits 1 class
No input, output or sensor may be added to the unit. · S.4.1
Legal 9 classes
Aftermarket permitted.
- Drag, Sea-Doo Pro Stock · DD.2
- Drag, Yamaha Spec · DD.3
- Drag, Sea-Doo Spec · DD.4
- Drag, Super Stock · DD.5
- Ski GP · K.6.1
- Sport GP · V.7.1
- Drag, 2 Stroke Unlimited · DD.12
- Drag, Stand Up Unlimited · DD.10
- Runabout GP · X.5.1
Legal 1 class
Reflash or standalone. · DD.1
No rule, this is an open class 1 class
No restriction in section CC, and CC.1 permits any modification it does not restrict.
- Freestyle · CC
No rule, this is an open class 1 class
The class states only what it bans and calls itself run what you brung, against a section DD preamble that says anything unlisted is illegal.
- Drag, Unlimited · DD.6
Aftermarket or standalone ECU: if the rule your class applies reads differently to you, or the rulebook has changed since this was read, ask. We answer with the section we read it from, or that we have not read it. Ask a rules question.
Every IHRA class · where the rulebooks differ · signed checks on parts the shop sells.
Ignition · two and four stroke · legal outright in 14 of 29