OEM part required 2 classes
Must remain OEM. No modifications to the throttle plate or housing.
- Ski 1100 Modified · R.3.2
- Ski 1500 Modified · Q.3.2
IHRA · Fuel
Aftermarket throttle body
IHRA answers this part for 24 of its classes. 6 of those answers are permissions, with or without limits attached, and 18 are not. 11 are inferred from how the class is written rather than quoted from a rule naming this part.
Where it stands, class by class
24 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.
No rule, this is an open class Our reading, not a rule we can quote at you. This class carries no stock clause at all, so anything unlisted appears to be open. The rulebook does not say so in terms.
OEM part required 1 class
Must remain OEM. Interchangeable between WaveRunner models. · DD.1
OEM part required 1 class
Must remain OEM. Cable-driven bodies may be bored to latest-model specifications. · DD.2
OEM part required 1 class
Must remain OEM. · DD.3
OEM part required 1 class
Must remain OEM. Cable-driven bodies may be bored to newer-model Sea-Doo specifications. · DD.4
OEM part required 1 class
Must remain OEM. Four-stroke entries: No modifications to throttle plate angles or housing. · BB.4.3
Not permitted, not listed in the rules 9 classes
On a closed list an unlisted modification is not permitted. · A.2.2, J.1
Legal, within limits 2 classes
Butterfly count must not exceed cylinder count.
- Ski GP · K.4.1
- Runabout GP · X.3.3
Legal, within limits 1 class
Yamaha SVHO: Aftermarket throttle body adapters permitted. · W.3.4
Legal, within limits 1 class
Butterfly count may be increased but must not exceed cylinder count. · CC.3.6
Legal, within limits 1 class
On four-stroke entries the butterfly count must not exceed the cylinder count. · V.5.3
Legal 1 class
Aftermarket permitted. · DD.5
No rule, this is an open class 2 classes
The class states only what it bans and calls itself run what you brung, against a section DD preamble that says anything unlisted is illegal.
- Drag, Stand Up Unlimited · DD.10
- Drag, Unlimited · DD.6
Aftermarket throttle body: 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 IHRA class · where the rulebooks differ · signed checks on parts the shop sells.
Fuel · four stroke · legal outright in 6 of 24