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)
The single cleanest Vintage Ski vs Vintage Ski Limited discriminator.
Where it stands, class by class
12 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.
Legal, within limits 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, within limits 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 · none - this document uses ALL-CAPS section headings, not numbered rules
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
RAL.8
- Runabout Limited · RAL
Legal 1 class
VSC.5
- Vintage SC · VSC
Legal 1 class
VX2.5
- Vintage X2 · VX2
Legal 1 class
CDI may be modified or aftermarket; timing may be changed; TOTAL LOSS IGNITION SYSTEMS MAY BE USED. · VSK.5
Legal 1 class
FREST.5.1
- Freestyle · FREST
Legal 1 class
Modified or aftermarket ignition system, electrical box, flywheel and flywheel cover. · SKGP.5.1
Legal 1 class
SPGP.8.1
- Sport GP · SPGP
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 · signed checks on parts the shop sells.
Ignition · two stroke · legal outright in 11 of 12