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Aftermarket waterbox

IJSBA · Exhaust

Aftermarket waterbox

Frequently where a stock class draws the line even when the chamber is legal.

Where it stands, class by class

20 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.

Not permitted, not listed in the rules Our reading, not a rule we can quote at you. This class requires the craft to stay stock except where the rules allow otherwise, and this part is not on the list.

Not legal 1 class

Two-stroke exhaust stock. · RAS.4.5

OEM part required 1 class

Any modification to the water box is prohibited. · FSKL.3.6

OEM part required 1 class

Modifying the OEM waterbox is prohibited. · RAL.4.7

Not permitted, not listed in the rules 1 class

VSKL.3.7 lists manifold, head pipe and expansion chamber only. Waterbox is not listed.

Not permitted, not listed in the rules 1 class

No waterbox allowance in · SKM

Legal, within limits 1 class

Kawasaki, Yamaha and Polaris may relocate and replace with aftermarket. Sea-Doo HX must use an OEM factory HX waterbox with water fittings plugged.

  • Sport Spec · none - this document uses ALL-CAPS section headings, not numbered rules

Legal 1 class

SPGP.5.9

Aftermarket waterbox: 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.

Exhaust · two and four stroke · legal outright in 10 of 20

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BaddJet Class Legality