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Class Legality

IJSBA · Fuel

Aftermarket fuel filler cap, IJSBA

One of the few fuel-system parts legal almost everywhere.

This page is IJSBA only, and the bodies do not agree. The same part under 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

Legal
Keep it. The rules permit this part in this class.

Legal 20 classes

Modified or aftermarket filler cap allowed provided no hazard is created. The FILLER and RELIEF VALVE themselves must stay OEM.


Aftermarket fuel filler cap: 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.

Fuel · two and four stroke · legal in 20 of 20 answered

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