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Class Legality

IHRA · drag

Drag, Stand Up Unlimited

IHRA 2026, DD.10. An open class. It carries no clause requiring the craft to stay stock, so anything the rules do not restrict appears to be permitted. That reading is ours rather than the rulebook’s.

  • 1Not legal
  • 12Legal, with conditions
  • 14Legal
  • 51No rule, this is an open class

Read out of the published IHRA rulebook on 2026-09-11, so confirm anything that decides a purchase. The full note is at the foot of the page.

Running the class

Eligible craft
A stand-up personal watercraft from any manufacturer, named in the rulebook as including but not limited to Kawasaki, Yamaha and Fast Powersports. It must be jet driven, and surface-drive propellers are not permitted.
Displacement limit
None.
Licence or tier
Not stated.
Minimum weight
Not stated.

Read from the same class section as the part answers. The rider side of the sport, tiers, ages, licences and what gets inspected, is set out across the bodies at Racing.

Open questions on this class (2)

Places where the rulebook contradicts itself, or where a figure could not be settled. Nothing in this list is decided, and it sits here rather than in a footnote because it is what you would want before spending money.

  • Recorded as open-list on the strength of its own "Run What Ya Brung" description and its open fuel rule, against the DD preamble which says anything unlisted is illegal.
  • Fast Powersports is named as a manufacturer in the eligible craft list and appears nowhere else in the rulebook.

Sections this rulebook does not contain for this class

Confirmed absent by a targeted read rather than merely unnoticed. In a closed-list class an absent article is why a part reads as not permitted; in an open class it is why one reads as open.

  • Everything except the four bullets. No engine, pump, hull or safety article specific to this class.

What the rules say (78 parts)

14 permitted outright, 12 permitted with stated conditions, 1 refused by a rule we can quote and 51 left open by our reading of the class rather than by a quoted permission. Grouped where the same rule gives the same answer, so two "Not legal" groups can sit side by side under different rules. An open class gives one answer to most questions, and printing it once per part would say the same sentence forty times.

What each answer below means

Not legal
This comes off. The rules refuse it in this class.
Legal, with conditions
Keep it, but measure it: the rules permit this part only inside stated limits.
Legal
Keep it. The rules permit this part in this class.
No rule, this is an open class
Probably keep it. The class carries no stock clause at all, so anything unlisted appears to be open. The rulebook does not say so in terms, and this is our reading rather than a permission anybody wrote down.

Read the refusals as a list of work. Anything below marked Not legal, OEM part required, or Not permitted has to come off the machine, or go back to the standard part, before it races in this class.

Not legal1 part

Bolts, nuts and washers may not be substituted with titanium unless originally equipped. Locking mechanisms are allowed. J.7

Legal, with conditions1 part

Repairs are allowed for a crack or puncture, but only one damaged area affecting one cylinder bank. No other modification. J.11

Legal, with conditions1 part

May be modified or replaced with an aftermarket part. The original diameter must be maintained in Stock class, and the rulebook never defines which classes that is. J.18.2

Legal, with conditions1 part

May be replaced within OEM specifications. J.18.3

Legal, with conditions1 part

Aftermarket or modified, full-length type with at least one bar parallel to the driveshaft, dropping no more than 12.00mm (0.47 in) below the flat plane of the pump intake. J.18.1

Legal, with conditions1 part

Aftermarket or modified. An extension may not exceed the width of the original plate, and on a ski may not extend more than 100 mm (3.94 in). J.18.1

Legal, with conditions1 part

Replacement trim plates may be used provided they mimic the handling characteristics of the stock plates. J.18.2

Legal, with conditions1 part

Must be a stand-up PWC from any manufacturer, jet driven, with surface-drive propellers not permitted. DD.10

Legal, with conditions1 part

Aftermarket, modified, repositioned or removed. Up to two, each no longer than 36 in (91.45 cm), protruding no more than 3.94 in (100 mm) horizontally, at least 6 mm thick with radiused leading edges, and not attached to a planing surface. J.16

Legal, with conditions1 part

The handle pole assembly and mounting brackets may be modified or replaced provided original functionality is retained. Length may be altered and the attaching point reinforced. J.17.2

Legal, with conditions1 part

Replacement bumpers and side rails may be used provided they create no hazard. A permanently affixed nose bumper remains required. J.13, I.17

Legal, with conditions1 part

May be added to adjust handling. Constant mass only, and no other part may be modified to carry it. J.19

Legal1 part

An aftermarket ECU is permitted with no limit stated, which this site reads as covering a reflash, as DD.1 and DD.2 say in terms. DD.10

Legal1 part

DD.10 permits an aftermarket ECU, and on a two-stroke entry that unit is the CDI box, so an aftermarket CDI is allowed in terms. DD.10

Legal1 part

May be replaced, as may starters and oil injection systems, with the oil injection system removable or disconnectable. J.8

Legal1 part

Power adders are allowed in terms, which takes in a nitrous oxide system. DD.10

Legal1 part

Grips, throttle and cables may be modified or aftermarket. The bar must be padded at the mounting bracket or the crossbar padded. J.17.1

Legal1 part

Steering shaft, holder, handlebar holder and cables may be aftermarket, and quick-turn modifications are allowed. J.17.2

Legal1 part

The bilge pump may be modified or disconnected and aftermarket bilge draining systems are permitted, provided they create no hazard. J.10

No rule, this is an open class51 parts

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.

IHRA 2026, DD.10, read from the rulebook on 2026-09-11. Read the rule yourself. Every IHRA class · where the rulebooks differ · how this site reads a rulebook.

This is one class. Every part below also has a page of its own showing where it stands across every class this body runs, and legality by part is the index of them.

Cite this page

“Drag, Stand Up Unlimited, IHRA class rules”, BaddJet archive, https://baddjetarchive.com/legality/ihra/drag-stand-up-unlimited/

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78 parts read · 14 permitted, 12 with conditions · 2026 rulebook

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