Key Figures · Companies · Performance shop

Group K

An Arizona watercraft performance shop, listed by the International Jet Sports Boating Association as an associate member in 2005 and 2017, whose own pages say it builds engine kits and sponsors no racers.

• a year printed above a fact on this page
• a year printed above no fact

Printed above the facts, 1996, 2001, 2005 and 2017. Printed above none, 1997 to 2000, 2002 to 2004 and 2006 to 2016. 4 facts have no year printed above them and mark no box.

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What it made and sold

Likely

Group K's own About page describes it as an aftermarket high-performance shop in Fort Mohave, Arizona, that specialises in engine modification kits for Yamaha, Sea-Doo, Kawasaki, Polaris and Tigershark watercraft. It says its kit work is mostly modification of existing pieces, that it also builds complete race machines, and that it does not manufacture or distribute any bolt-on parts. The page as captured on 4 February 2005 makes the same statements.

Sources: Group K About page; Group K About page 2005

On the race sheets

1996 · Likely

Group K's own report on the 1996 offshore season lists riders under team labels that include its name, Yamaha-Group K and Kawasaki-Group K, and says one rider's machine carried a Group K Sleeper kit. Its own comments on the 1996 magazines call two of those riders its offshore test riders for developing its Sleeper kits and the third a technician and test rider. Both are the shop's account.

Sources: Group K offshore racing 1996; Group K Between the Lines 1996

The business on record

2001 · Likely

The printed record of a House Committee on Resources oversight hearing of 23 May 2001 includes a prepared statement given for the Personal Watercraft Industry Association. Its passage on the industry's reductions in engine noise since 1998 cites a personal communication from a named person at the Group K Personal Watercraft High Performance Shop, Mohave, Arizona. The industry association's own report of January 2006 on the history of personal watercraft cites a personal communication from Group K, Mohave, Arizona, dated 2001, in its passage on sound.

Sources: House hearing on park access 2001; PWIA history of PWC 2006

2005 and 2017 · Confirmed

The associate member directory of the International Jet Sports Boating Association (IJSBA), as its site showed it on 9 March 2005, lists Group K of Fort Mohave, Arizona, with a named contact, and the association's associate members page, a page carrying a last-modified stamp of 21 March 2017, lists Group K with the same contact. Neither gives the contact an office.

Sources: IJSBA associate directory 2005; IJSBA associate members page

Contested

Group K's own pages count its start two ways. The current About page says it has built race and recreational watercraft since 1986; the page as captured on 4 February 2005 says 2004 would be its 18th year of building watercraft, which counts from 1987 if the first year is counted. The two statements may be one start counted two ways. No document outside its own pages dates the start.

Group K About page says

The current About page says Group K has been building race and recreational watercraft since 1986.

Group K About page 2005 says

The About page as captured on 4 February 2005 says 2004 will be its 18th year of building watercraft.

Sources: Group K About page; Group K About page 2005

Likely

Group K's About page says it does not sponsor any racers or race teams, giving as its reason that hiring a professional rider to beat its customers is a conflict of interest, and says professional racers do most of its high-speed test riding but are, in its words, just test riders. The page as captured on 4 February 2005 says the same.

Sources: Group K About page; Group K About page 2005

Likely

Group K's page for the Kawasaki 750 stand-up says that during 2001 Kawasaki and Group K formed a relationship with an open exchange of information between Kawasaki's race team and the shop, the team to go on racing as before and the shop to go on selling its modifications. That is the shop's account; no Kawasaki document for it is held (searched the archive's mirror and research cache, 2026-10-16).

Sources: Group K Kawasaki 750 racing page

Names as printed

Group K Personal Watercraft High Performance Shop (House hearing on park access 2001)

Elsewhere in the archive

• History chapter: The aftermarket: shops, dealers and teams
• Organisation: International Jet Sports Boating Association
• Organisation: Personal Watercraft Industry Association
• Era: The makers and their machines
• Era: Noise, safety and federal rules
• Era: The rule book years

What the archive has not read (3)

• No document outside Group K's own pages says who founded or ran the shop, or whether its statement that it sponsors no racers held in practice (searched the archive's mirror and research cache, 2026-10-16).
• No state register record and no trademark record for Group K is held; the Arizona register is searched through a web form, which was not used (searched the archive's mirror and research cache, 2026-10-16).
• The hearing record does not say what the personal communication was or when it was made; the 2006 report dates it 2001 (searched the hearing record and the 2006 report, 2026-10-16).

Documents cited on this page

• House hearing on park access 2001 (govinfo.gov): Recreational Access to Public Lands, oversight hearing before the House Committee on Resources, 23 May 2001, Serial No. 107-32 (GPO text), U.S. House of Representatives, Committee on Resources; printed by the U.S. Government Printing Office, 2002; government, medium. The printed record of the hearing of 23 May 2001, published in 2002. Endnote 4 of a witness's prepared statement, given on behalf of the Personal Watercraft Industry Association, cites a personal communication from Harry Klemm of the Group K Personal Watercraft High Performance Shop for its passage on engine noise. Medium because the description of him is the witness's, printed in the record rather than found by the committee. The printing office's phone numbers are replaced in the held copy.
• Group K About page (groupk.com): About Group K (Group K page), Group K; manufacturer primary, medium. The shop's own statement of what it does, as read on 5 October 2026: engine modification kits, no manufacture or distribution of aftermarket bolt-on parts, and no sponsorship of racers or race teams, with its reasons. Medium for what the shop says about its policy, which is the shop's word; the years it counts itself in business are its own account of its history and no page relies on them. The held copy omits the site menus and replaces the phone number and an email address in place.
• Group K About page 2005 (web.archive.org): About Group K (Group K about.htm, Wayback capture of 4 February 2005), Group K, 2005-02-04; manufacturer primary, medium. An earlier capture of the same page, carrying the same statements on parts, testing and sponsorship and counting 2004 as the shop's eighteenth year. It dates the statements to no later than early 2005. Medium on the same terms as the current page. The held copy replaces the phone number and an email address in place.
• Group K offshore racing 1996 (groupk.com): Offshore Racing 1996, The View from Region 1 (Group K, groupk.com), Group K, 1996; enthusiast media, medium. A tuning shop's report on the 1996 IJSBA Region 1 offshore and endurance season, written during that season ("as of this writing") and kept on the shop's site, naming the riders, their sponsors and their machines. Medium as a trade participant's period report: Group K sponsored one of the riders it describes. The shop's telephone number is removed from the held copy.
• Group K Between the Lines 1996 (groupk.com): Between The Lines - 1996 (Group K, groupk.com), Group K, 1996; enthusiast media, medium. A tuning shop's comments on the technical items in the PWC magazines of 1995 and 1996, issue by issue, kept on the shop's site under the heading 1996. Read on 2026-10-05 and held as text. It is the shop's current page and no earlier capture is held (searched the archive's mirror and research cache, 2026-10-09), so the dating rests on the heading and on the issue-by-issue layout. Medium as a trade participant's period commentary: the shop sells engine kits and names the parts it uses, and its opinions of other makers' parts are not relied on. Cited only for which products it names as existing. The shop's telephone number and street address are removed from the held copy.
• PWIA history of PWC 2006 (pwia.org): The History, Evolution, and Profile of Personal Watercraft (a report by the Personal Watercraft Industry Association, January 2006), Personal Watercraft Industry Association, 2006-01; manufacturer primary, medium. The makers' trade association's own history, written to argue against park bans. Gives United States sales peaking in 1995 at about 200,000 units, 79,300 in 2002 and more than 79,500 in 2004, a sit-down share of about 99 percent since the mid-1990s, and four-stroke models from every maker by the 2003 model year. Medium: an advocacy document whose 2004 table cites the NMMA abstract and whose 1995 figure cites no source.
• IJSBA associate directory 2005 (web.archive.org): IJSBA associate members, corporate member directory (Wayback capture of 9 March 2005), International Jet Sports Boating Association, 2005-03-09; sanctioning body, high. The association's own list of companies holding associate membership, as its site showed it on 9 March 2005, each with an address and most with a named contact. High for which companies the association listed and whom it named for each; it gives no title or office for a contact. The held text is an excerpt of the page.
• IJSBA associate members page (ijsba.com): IJSBA Associate Members (IJSBA page), International Jet Sports Boating Association, 2017-03-21; sanctioning body, high. The association's current list of associate members, read live on 5 October 2026; the page carries a last-modified stamp of 21 March 2017, which is the date given here. High for whom the association lists; it gives no office for a named contact. The held copy replaces street addresses, phone numbers and email addresses.
• Group K Kawasaki 750 racing page (groupk.com): Kawasaki SXI Pro 750, Racing Mods (Group K page), Group K; manufacturer primary, medium. The shop's page for its kits for the Kawasaki 750 stand-up, undated and listing a 2002 model: a preface on a 2001 relationship with Kawasaki's race team, the exhaust section that defines the shop's use of dry for a Factory Pipe pipe, and the kit lists. Medium as a seller's description of products it sells; its relationship claims are the shop's own and no Kawasaki document is held (searched the archive's mirror and research cache, 2026-10-09). The held copy omits the site menus.

Cite this page

“Group K”, BaddJet archive, https://baddjetarchive.com/key-figures/companies/group-k/

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