UIM · Fuel

Replacement or aftermarket fuel tank, UIM

The GP1 classes are the only ones that allow it.

This page is UIM only, and the bodies do not agree. The same part under IHRA and IJSBA. Which one applies to you is decided by whoever sanctions the race you enter.

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This is one body's answer, not the sport's. You are bound by whichever body sanctions the event you enter. If you race more than one series, build to the stricter answer. The differences are set out in the rulebook comparison.

Where it stands, class by class

24 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. 8 of them borrow another class’s rules and are marked below; for those, the link to the parent class is read from the categories table rather than stated in the rulebook. 8 publish no rule for this part and name no parent to borrow one from, and are grouped together at the end.

What each answer below means

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.

No rule published for this class

Unanswerable here. This class publishes no rule for the part and names no parent class to borrow one from, which is an absence in the rulebook and not a permission.

OEM part required 3 classes

OEM fuel tank, pickup, filler, filter, tap assembly and relief valve must be used and may not be modified. · 501.02.04.02

• Ski Division GP3
• Ski Juniors GP3.2 · borrows another class
• Ski Juniors GP3.3 · borrows another class

OEM part required 1 class

OEM tank, pickup, filler, filter, tap and relief valve. · 502.02.05-02

• Runabout GP3

OEM part required 1 class

OEM tank, filler and relief valve; pickup, filter and petcock may be aftermarket; fuel cell foam may be added. · 502.03.05-04

• Runabout GP2

OEM part required 1 class

OEM fuel tank, filler and relief valve must be used and cannot be modified.

• Ski Division GP2 · 501.03

Not permitted, not listed in the rules 5 classes

No fuel-system hardware article; treat as stock under the closed list.

• Runabout GP4 · 502.01-02
• Ski Division GP4 · 501.01
• Runabout Juniors GP4 · 502.01-02 · borrows another class
• Runabout Ladies GP4 · 502.01-02 · borrows another class
• Ski Juniors GP4 · 302.01 · borrows another class

Legal, with conditions 3 classes

Fuel tanks may be modified or aftermarket. The filler neck must be located outside the engine compartment and the tank must present no danger to the pilot or other users. 501.04.02.08/.09

• Ski Division GP1 · 501.04
• Ski Ladies GP1 · 314 · borrows another class
• Ski Veterans GP1 · 302.01.05 · borrows another class

Legal, with conditions 2 classes

Modified or aftermarket tanks permitted; filler neck outside the engine compartment. · 502.04.02-08

• Runabout GP1
• Runabout Veterans GP1 · borrows another class

No rule published for this class 8 classes

No component rules are published for this class and no single parent class is named, so this part cannot be answered for it. That is an absence in the rulebook, not a permission.

• Endurance · 317.03
• Freestyle Amateur · 312
• Freestyle Free · 312
• Jet Raid · 317.01
• Offshore · 317.02
• Parallel Slalom · 313
• Ski Future Electric (SFE) · 302.01
• UIM Hydro-Fly · 900

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Replacement or aftermarket fuel tank: 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.

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