IHRA answers this part for 18 of its classes. 0 of those answers permit the part outright and 18 permit it with stated conditions, leaving 0 that do not.
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.
18 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.
Keep it, but measure it: the rules permit this part only inside stated limits.
Legal, with conditions 18 classes
Braking devices may be disabled for safety, and reverse buckets and trim motors may be removed or modified to disable them, provided no hazard is created. · J.18.4
Reverse bucket or brake removal: 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.