Vintage and competition personal watercraft

Class legality, tuning and model history

What the rulebooks say, what the documents say, and which of the two a given page is telling you. Nothing here is a manufacturer's claim repeated without its source.

For racers. Not yet verified by one. A check is signed against a named rulebook by a named person on a stated date, or the page says it has not been. Where two bodies disagree, both figures are printed and neither is stored as the answer.

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• Is it legal in my class?

  Two different things, in order of proof. The rulebook reference is read from the published documents of three sanctioning bodies and checked by nobody yet. The signed checks are fewer, each against one part, each naming the person who made it and the date.

  Bodies read

  3

  Classes read

  73

  Part types addressed

  207

  Signed checks

  16

• How does it actually work?

  Tuning material, written so the reasoning is visible rather than the conclusion alone. A spec table names the document its numbers came from, or says plainly that nobody has filled it in.

  Tuning articles

  8

  Spec tables

  6

• What was this model?

  Model history by make and year, each row carrying the document it came from. The established references rank on these queries and carry no sourcing at all, which is the whole reason this one is slower to fill.

  Model year rows

  1222

  Makes

  3

  Dealer magazine issues indexed

  77

• What have people actually built?

  Builds other people ran, recorded from what they published rather than from what we would recommend. A builder’s own figures are printed as the builder’s, never as measured.

  Builds recorded

  8

Where the parts are

Nothing is sold from this site. Parts, machines, gear and setup sheets moved to their own site on 2026-09-20, along with how we ship and return. The legality checks that name a part link straight to it. Nothing is priced there yet either, and the enquiry form is still how a price is asked for.

Motorised surfboard racing sits on a third site, under a different sanctioning body and its own rulebook. It is kept apart rather than folded in, because an article number from one sport is not an article number in the other, and citing the wrong one at a tech inspection is how a rider loses a day.

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