OEM part required 1 class
CDI UNIT MUST REMAIN OEM. No aftermarket CDI, no timing changes, no total-loss ignition. · VSKL.5.1
IJSBA · Ignition
Aftermarket CDI / ignition box (2-stroke), IJSBA
The single cleanest Vintage Ski vs Vintage Ski Limited discriminator.
This page is IJSBA only, and the bodies do not agree. The same part under IHRA. Which one applies to you is decided by whoever sanctions the race you enter.
Where it stands, class by class
12 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
- OEM part required
- This comes off. Only the part the manufacturer fitted is allowed here.
- Legal, with conditions
- Keep it, but measure it: the rules permit this part only inside stated limits.
- Legal
- Keep it. The rules permit this part in this class.
Legal, with conditions 1 class
Modified or aftermarket ECU retaining original inputs, outputs and connections. Timing may be altered by slotting the trigger mounting plate or via an adapter plate. · SKL.5
Legal, with conditions 1 class
Yamaha CDI modified or aftermarket provided timing is NOT manually adjustable. Kawasaki Gen 2 (2005-2007) CDI may be programmable. Advancing timing at the stator plate is prohibited on every model.
- Sport Spec · section headings, no numbered rules
Legal 3 classes
The CDI unit may be modified or aftermarket, ignition timing changed and the ignition pickup mount modified, while the original equipment charging system must stay.
- Runabout Limited · RAL.8.1
- Vintage SC · VSC.5.1
- Vintage X2 · VX2.5.1
Legal 3 classes
Modified or aftermarket ignition system, electrical box, flywheel and flywheel cover.
- Freestyle · FREST.5.1
- Ski Grand Prix · SKGP.5.1
- Sport GP · SPGP.8.1
Legal 1 class
Two-stroke CDI modified or aftermarket.
Legal 1 class
Two-stroke ECU may be modified or aftermarket with no additional I/O. · RAS.8.2
Legal 1 class
CDI may be modified or aftermarket; timing may be changed; TOTAL LOSS IGNITION SYSTEMS MAY BE USED. · VSK.5
Aftermarket CDI / ignition box (2-stroke): 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 · two stroke · legal in 11 of 12 answered, 2 with conditions