- openbook Competition Bulletin 2021-9: Tentative 2022 ATVMX AMA Pro Rules, ATVMX Amateur Supplemental Rules and National Classes Available for Public CommentTimeOctober 29, 2021The Tentative 2022 ATVMX Supplemental Rules and National Classes are now available for inspection and public comment through…
- openbook Competition Bulletin 2021-8: WMX & Pro Sport Virtual Riders Meetings Date and Time AnnouncedTimeOctober 28, 2021WMX & Pro Sport Virtual Riders Meetings Date and Time Announced
- openbook Competition Bulletin 2021-7: ATVMX Virtual Riders Meetings Dates and Times AnnouncedTimeSeptember 30, 2021ATVMX Virtual Riders Meetings Dates and Times Announced
- openbook Competition Bulletin 2021-6: 2021 Top 10 Posted for Public ReviewTimeSeptember 21, 20212021 Top 10 Posted for Public Review
- openbook Competition Bulletin 2021-5: Modification to Production Stock Chart: Clutch BasketTimeApril 26, 2021The 2021 Production Stock Chart has been modified to allow the use of the 2009 Yamaha clutch basket OEM replacement part.
- openbook Competition Bulletin 2021-4: ODD Race Order Posted and Production Stock Class Clarification Chart UpdateTimeApril 6, 2021The 2021 ATVMX ODD Race Order has been revised and posted online for the Texas ATVMX Round this weekend. Any discrepancies…
- openbook Competition Bulletin 2021-3: 2021 AMA Racing Rulebook UpdateTimeJanuary 27, 2021On December 14, 2020 the American Motorcyclist Association (AMA) issued the following Competition Bulletin below. Ultimately…
- openbook Competition Bulletin 2021-2: Final 2021 ATVMX Supplemental Rules, National Classes and Production Stock ChartTimeDecember 17, 2020Final 2021 ATVMX Supplemental Rules, National Classes and Production Stock Chart
- openbook Competition Bulletin 2021-1: Tentative 2021 ATVMX Supplemental Rules, National Classes and Production Stock Chart Available for Public CommentTimeNovember 23, 2020Tentative 2021 ATVMX Supplemental Rules, National Classes and Production Stock Chart Available for Public Comment
- openbook Competition Bulletin 2020-9: Request for Proposals: Rules/Class Changes for the 2021 ATV Motocross SeasonTimeNovember 11, 2020Request for Proposals: Rules/Class Changes for the 2021 ATV Motocross Season
- openbook Competition Bulletin 2020-8: ATVMX Virtual Riders Meetings Dates And Times AnnouncedTimeNovember 5, 20202021 ATMX Virtual Riders Meetings Dates And Times Announced
- openbook Competition Bulletin 2020-7: 2020 Amateur Top 10 Posted for Public ReviewTimeOctober 13, 2020The Tentative Amateur Top 10 Series Class Results are now available for public review