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Class Legality

IJSBA · Hull and handling

Aftermarket hood / engine cover, IJSBA

IJSBA answers this part for 20 of its classes. 9 of those answers permit the part outright and 1 permit it with stated conditions, leaving 10 that do not. 1 are inferred from how the class is written rather than quoted from a rule naming this part.

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

20 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

Not legal
This comes off. The rules refuse it in this class.
OEM part required
This comes off. Only the part the manufacturer fitted is allowed here.
Not permitted, not listed in the rules
Treat it as coming off. The class requires the craft to stay stock except where the rules allow otherwise, and this part is not on the list, so this is our reading rather than a rule we can quote at you.
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.

OEM part required 2 classes

No hood change is listed, and even the engine compartment ventilation tubes must remain as originally equipped, so the hood stays OEM.

OEM part required 1 class

Engine compartment ventilation tubes must remain as originally equipped.

Not permitted, not listed in the rules 1 class

Aftermarket hoods are NOT listed as permitted. Under VSKL.2.2 and the closed-list rule the hood should be treated as OEM-required. This is a direct contrast with the other three Vintage classes. Whether VSKL.1.1's allowance of Stock Class provisions brings it back in is flagged as a commercially significant open question.

Legal, with conditions 1 class

Ventilation tubes may be modified, relocated or removed. Polaris Hurricane hood/mirror cowling may be replaced provided it creates no additional airflow. NO OTHER hood modifications permitted.

  • Sport Spec · section headings, no numbered rules

Legal 3 classes

An aftermarket hood may be used. The ventilation tube clause still allows no other modification to the hood, so the original hood cannot be reworked beyond its vents.

Legal 1 class

Aftermarket hoods allowed. · SKM.2.3

Legal 1 class

Hood modified or aftermarket. · SKSS.2.9

Legal 1 class

Freestyle prints no hood clause, but engine covers, storage covers, hatches and instrument cowlings may be modified or aftermarket if no hazard is created, and the top deck may be modified or aftermarket within its size limits. · FREST.2.2, FREST.2.16

Legal 1 class

Though the rule text confusingly references the Ski Modified class.

Legal 1 class

Hood assemblies may be modified or aftermarket provided a hazard is not created. · SPGP.3.16

Legal 1 class

Hoods, hatches, covers and cowlings modified or aftermarket, OEM appearance maintained. · ROP.3

Aftermarket hood / engine cover: 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.

Hull and handling · two and four stroke · legal in 10 of 20 answered, 1 with conditions

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