The rules do not say 1 class
SKM has no electrical or ignition section (SKM.5 jumps to SKM.9).
- Ski Modified · SKM
IJSBA · Ignition
ECU reflash / reprogramming of the OEM unit, IJSBA
The stock-class-legal tuning route. Hardware stays, software changes.
This page is IJSBA only, and the bodies do not agree. The same part under IHRA and UIM. Which one applies to you is decided by whoever sanctions the race you enter.
Where it stands, class by class
14 classes, grouped where the same rule gives the same answer rather than listed one by one, because an answer that holds for a class usually holds for every class that borrows its rules.
What each answer below means
- The rules do not say
- Unanswered. The rules do not settle this, so ask the club before you rely on it.
- Legal
- Keep it. The rules permit this part in this class.
The rules do not say 1 class
No ignition/ECU section was found in SKSS. Do not assert either way.
- Ski Superstock · SKSS
Legal 8 classes
Reprogramming of the original ECU with no additional inputs or outputs and original connections retained.
- Fixed Steering Ski Stock · FSSK.5.2
- Runabout Rec Lites · RRL.5.2
- Ski Stock · SSK.5.2
- Four Stroke Ski Lites · FSKL.5.2
- Runabout Naturally Aspirated · RNA.7.2
- Runabout Stock · RAS.7.2
- Runabout Limited · RAL.7.2
- Runabout Superstock · RSS.8.2
Legal 3 classes
The ignition system and electrical box may be modified or aftermarket with no limit on inputs or outputs, read here as covering the ECU, which the class document does not name.
- Freestyle · FREST.5.1
- Ski Grand Prix · SKGP.5.1
- Sport GP · SPGP.8.1
Legal 1 class
ROP.7.1: "Ignition system, electrical box, flywheel and flywheel cover may be modified or aftermarket", with no limit on inputs or outputs. On these four-stroke craft (ROP.4) the ECU runs the ignition and sits in the electrical box, and the class also allows added injectors (ROP.5.1), removing the airflow sensor (ROP.5.2) and adding a turbo or supercharger (ROP.8.1), none of which works without a changed ECU. A reading of ROP.7.1: the class document does not name the ECU, where Limited and Superstock do (RAL.7.2, RSS.8.2). · ROP.7.1
ECU reflash / reprogramming of the OEM unit: 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 IJSBA class · where the rulebooks differ · checks on parts the shop sells · how this site reads a rulebook.
Ignition · four stroke · legal in 12 of 14 answered