A Temporada do Campeonato Mundial de Motovelocidade de 1975 foi a 27ª edição promovida pela F.I.M.. A temporada começou em Paul Ricard e encerrou-se em Brno.

No início dos anos 70, Yamaha, Honda e Suzuki somavam vitórias e títulos nas categorias de 125 e 250cc. No entanto, só em 1975 é que uma equipe japonesa conseguiu chegar ao topo do mundo da motovelocidade, com a Agostini a vencer o seu último título de 500cc numa Yamaha.

Esta vitória foi a primeira de muitas para as construtoras japonesas. No ano seguinte, Barry Sheene venceu o título de 500cc numa Suzuki, dando início a um período de domínio para as equipes japonesas, que venceram todos os títulos entre 1975 e 2007. Casey Stoner quebrou o feitiço ao conquistar o seu primeiro título do MotoGP com a Ducati, mas desde então que só Honda e Yamaha vencem troféus na categoria principal.

Calendário #DataGrande PrêmioCircuito 1 30 de Março Grande Prêmio da FrançaCircuito Paul Ricard 2 20 de Abril Grande Prêmio da EspanhaCircuito Permanente del Jarama 3 4 de Maio Grande Prêmio da ÁustriaSalzburgring 4 11 de Maio Grande Prêmio da AlemanhaHockenheimring 5 18 de Maio Grande Prêmio da ItáliaAutódromo Enzo e Dino Ferrari 6 6 de Junho Tourist Trophy da Ilha de ManSnaefell Mountain Course 7 28 de Junho Grande Prêmio da HolandaTT Circuit Assen 8 6 de Julho Grande Prêmio da BélgicaCircuito de Spa-Francorchamps 9 20 de Julho Grande Prêmio da SuéciaAutódromo de Anderstorp 10 27 de Julho Grande Prêmio da FinlândiaImatra Circuit 11 24 de Agosto Grande Prêmio da TchecoslováquiaCircuito Masaryk 12 21 de Setembro Grande Prêmio da IugosláviaOpatija Circuit

Resultado das corridas # Grande Prêmio 50cc 125cc 250cc 350cc 500cc Info1 GP da FrançaSem Disputa Kent Andersson Johnny Cecotto Johnny Cecotto Giacomo Agostini2 GP da Espanha Angel Nieto Paolo Pileri Walter Villa Giacomo AgostiniSem Disputa3 GP da ÁustriaSem Disputa Paolo PileriSem Disputa Hideo Kanaya Hideo Kanaya4 GP da Alemanha Angel Nieto Paolo Pileri Walter Villa Johnny Cecotto Giacomo Agostini5 GP da Itália Angel Nieto Paolo Pileri Walter Villa Johnny Cecotto Giacomo Agostini6 Tourist TrophySem DisputaSem Disputa Chas Mortimer Charlie Williams Mick Grant7 GP da Holanda Angel Nieto Paolo Pileri Walter Villa Dieter Braun Barry Sheene8 GP da Bélgica Julien van Zeebroeck Paolo Pileri Johnny CecottoSem Disputa Phil Read9 GP da Suécia Eugenio Lazzarini Paolo Pileri Walter VillaSem Disputa Barry Sheene10 GP da Finlândia Angel NietoSem Disputa Michel Rougerie Johnny Cecotto Giacomo Agostini11 GP da TchecoslováquiaSem Disputa Leif Gustafsson Michel Rougerie Otello Buscherini Phil Read12 GP da Iugoslávia Angel Nieto Dieter Braun Dieter Braun Pentti KorhonenSem Disputa

Pilotos e equipes Os seguintes pilotos e equipes foram inscritos para participar do Campeonato Mundial:

500cc Equipe Construtor Moto Pneu N.° Nome do piloto RodadaBMW BikesBMWBMW TDT 50023Horst Gluck1–16Danfay YamahaYamahaYamaha YTR50041Chas Mortimer1–16DucatiDucatiTestarossa 50059Sergio Baroncini1–16Dugdale Maxton YamahaYamahaYamaha YTR50042Charlie Williams1–16Heron Suzuki GBSuzukiSuzuki SP55552Barry Sheene1–1616John Newbold1–1669Stan Woods1–16HondaHondaHonda DRS 50066Hartley Kerner1–16HusqvarnaHusqvarnaDeta MC 5004Bo Granath1–12JawaJawaAveo SH 50010Bohumil Stasa1–16MV AgustaMV AgustaFirenza Ca 5008Armando Toracca1–1236Gianfranco Bonera1–1683Phil Read13–21Oakley YamselYamselYamsel DS42087Geoff Barry1–16McVeigh YamahaYamahaYamaha YTR50038Steve Tonkin1–16Renstar YamahaYamahaYamaha YTR50080Les Kenny1–16 Scribante Lucky Strike RacingHarley-DavidsonMiddlesex A88Jaime Samaranch1–1648Michel Rougerie1–16 AAW Racing TeamHarley-DavidsonMiddlesex A97Mimmo Cazzaniga1–1670Germano Paganini1–16NortonNortonSuper CT 50015Donald Grant1–1264Malcolm Lucas1–1654Tom Newell13–21VelocetteVelocetteFactory SA 50031Fred Walton1–16MatchlessMatchlessCaprices 500R11David Hughes1–1268Selwyn Griffiths1–1647Tom Herron13–21SeeleySeeleySpark 500x53Walter Dawson1–16RotaxRotaxGen M40033Gernot Maas1–1293Max Wiener1–1691Michael Schmid13–21 Trojan-Taunarac RacingHarley-DavidsonMiddlesex A45Gary Scott1–16YamselYamselYamsel DS4207Abe Alexander1–1279Alan Rogers1–1612Denis Gallagher13–21 Maki EngineeringKönigKönig Gaibin21Ulrich Eickmeyer1–1618Edmund Czihak1–16 John Goldie Racing with HexagonKawasakiLG K50074Yvon DuHamel1–125Barry Ditchburn1–1613Mick Grant13–21 Team GunstonKönigKönig Gaibin82Reinhard Hiller1–1690Ernst Hiller1–16 Pinch Plant LtdKönigKönig Gaibin46Horst Lahfeld1–1655Frank Fellmann1–166Christian Leon1–1676Dick Alblas1–16 Blignaut Lucky Strike RacingKönigKönig Gaibin65Alfred Bajohr1–1619Mick Poxon1–16 Scuderia FinottoSuzukiSuzuki SP55592Bill Robertson1–1657R Bianconcini1–16 Token RacingSuzukiSuzuki SP55514Roger Sutcliffe1–1622Teuvo Länsivuori1–1689Derek Loan1–16 Dempster International Racing TeamSuzukiSuzuki SP55595Nico Cereghini1–1677Roberto Gallina1–1630Bill Robertson1–16 Chequered FlagSuzukiSuzuki SP55520Egid Schwemmer1–1675Armando Toracca1–1640Brian Warburton1–16 EMC CorporationSuzukiSuzuki SP55528Marcel Ankoné1–1671Rob Bron1–16 Team Canada Moto RacingSuzukiSuzuki SP55526Bernie Toleman1–16 Vel's Parnelli Jones RacingYamahaYamaha YTR50032Adu Celso-Santos1–16 Allied Polymer GroupYamahaYamaha YTR50043Bernard Murray1–1656Jan Kostwinder1–16 Hennes & Mauritz RacingYamahaYamaha YTR50060Graham Waring1–16 Telstra MotorsportYamahaYamaha YTR50035Alan North1–16 Sparta Grand PrixYamahaYamaha YTR50049Bernd Tungethal1–163Bill Henderson1–16 Mondelēz InternationalSeeley-YamahaY-Body 50034Abe Alexander1–16 Reckitt Benckiser RacingYamahaYamaha YTR50085Bill Rae1–1627Christian Bourgeois1–16 Reckitt Benckiser RacingYamahaYamaha YTR5009Alex George1–1617Dennis Trollope1–16 Japan Tobacco InternationalYamahaYamaha YTR50039Charlie Dobson1–1678François Hollebecq1–16 Telefónica TeamYamahaYamaha YTR50061Chris Neve1–1629Hans Stadelmann1–16 SABMiller GPYamahaYamaha YTR50096Chas Mortimer1–1686Bill Simpson1–16 Siemens EngineeringYamahaYamaha YTR50094Børge Nielsen1–1663Hans Ruedi Keller1–1681Anssi Resko1–1698James Scott1–1651Jan Van Disseldorp1–1624Franz Laimböck1–16 Union Pacific RailroadYamahaYamaha YTR50062Brian Moses1–1637Cliff Carr1–1672Hans Braumandl1–1625James Ashton1–1673Frank Rutter1–161Jean-François Baldé1–16 Inditex MotorsportYamahaYamaha YTR50050Bill Smith1–162Derek Chatterton1–1699Guido Mandracci1–1684Florian Bürki1–1667Hans-Otto Butenuth1–1644Jean-Paul Boinet1–16 British American TobaccoYamahaYamaha YTR50058Boet van Dulmen1–1669Ari Heikkilä1–1685G Barzanti1–1694Helmut Kassner1–1695John Cowie1–164Paolo Tordi1–16 Daimler AG TeamYamahaYamaha YTR50021Barry Randle1–1678Félix Harzenmoser1–166Jack Findlay1–1634John Dodds1–1618Patrick Pons1–16 United Technologies CorporationYamahaYamaha YTR50053Bob Heath1–1672Derek Tierney1–1643Ernie Coates1–1623Norman Dunn1–1645Paul Cott1–16 Philip Morris InternationalYamahaYamaha YTR5009Edmar Ferreira1–1610Barry Sheene1–1625Henry McEwan1–1663John Taylor1–1630Olivier Chevallier1–1690G Salsi1–16 Total S.A.YamahaYamaha YTR50082Bjorn Hasli1–1689Donal Cormican1–1671Giorgio Gatti1–1654Ingemar Larssen1–1664Mick Chatterton1–1649Neil Tuxworth1–16 BHP Billiton TeamYamahaYamaha YTR50017Didier Ravel1–1619Gerard Choukroun1–1635Bernard Fau1–1639Hideo Kanaya1–1614John Weeden1–1627Nico van der Zanden1–16 Bayer AG RacingYamahaYamaha YTR50031Dieter Braun1–1679Gerry Mateer1–1674Billie Guthrie1–163Johnny Bengtsson1–1696Mick Burns1–1699Philippe Coulon1–16 Yamaha Motor CompanyYamahaYamaha YTR5007Giacomo Agostini1–1660Ian Richards1–1629John Williams1–1642Peter Schrötges1–16 Sanofi ÉquipeYamahaYamaha YTR50047Karl Auer1–1697Phil Carpenter1–1651Wil Hartog1–16 Gilead Sciences MotoYamahaYamaha YTR50059Peter Mckinley1–1692Ken Huggett1–16 IBM CorporationYamahaYamaha YTR50088Phil Gurner1–1638Tony Rutter1–1667Kjell Solberg1–16 Merck Group RacingYamahaYamaha YTR50087Les Kenny1–1615Tom Robinson1–1680Peter Grove1–16 Tencent EngineeringYamahaYamaha YTR50033Philippe Bouzanne1–1675Tom Herron1–165Victor Palomo1–1658Malcolm Moffat1–16 Oracle CorporationYamahaYamaha YTR50037Thierry van der Veken1–1613Mario Necchi1–1632Peter Balaz1–16 Royal Dutch Shell TeamYamahaYamaha YTR50081Percy Tait1–1650Martin Read1–16 Chevron CorporationYamahaYamaha YTR50093Pentti Korhonen1–1620Pentti Lehtelä1–1657Martyn Sharpe1–16 Anheuser-Busch AutosportYamahaYamaha YTR50024Pekka Nurmi1–1677Philippe Chaltin1–1628Seppo Kangasniemi1–16 Hoffmann-La Roche RacingYamahaYamaha YTR5008Pierre Longet1–1641Roland Nilsson1–16 General ElectricYamahaYamaha YTR50046Robert Keller1–1666Walter Kaletsch1–16 Novartis Racing TeamYamahaYamaha YTR50012Piet van der Wal1–1670Thierry Tchernine1–16 ExxonMobil RacingYamahaYamaha YTR50022Steve Ellis1–1691Tapio Virtanen1–1686Roger Nichols1–16 Statoil National TeamYamahaYamaha YTR50062Roger Ruiz1–1626Piers Forrester1–16Legenda Piloto da Temporada Piloto Convidado Piloto Substituto

350cc Equipe Construtor Moto Pneu N.° Nome do piloto Rodada Venemotos Racing TeamYamahaYZR35066 Johnny Cecotto1–1638 Giacomo Agostini1–16 ExxonMobil RacingYamahaYZR35046 Pentti Korhonen1–1651 Dieter Braun1–16 PetroChina CompanyYamahaYZR35055 Patrick Pons1–1688 Chas Mortimer1–16 Novartis Racing TeamYamahaYZR3504 Gerard Choukroun1–1653 Otello Buscherini1–16 General ElectricYamahaYZR35068 Tom Herron1–1689 Hideo Kanaya1–1630 Víctor Palomo1–1631 Alex George1–16 Hoffmann-La Roche RacingYamahaYZR3507 Philippe Coulon1–16 16 Hans Stadelmann1–16 Team MotulDugdale Maxton YamahaZ11SN34 Charlie Williams1–12 Verizon CommunicationsYamahaYZR35036 Karl Auer1–1699 Mario Lega1–16 Anheuser-Busch AutosportYamahaYZR3502 Jean-Louis Guignabodet1–1221 Giovanni Proni1–1612 Marco Lucchinelli13–21 Chevron CorporationYamahaYZR35064 Bill Henderson1–1645 Jon Ekerold1–16 Royal Dutch Shell TeamYamahaYZR35040 Olivier Chevallier1–16 Samsung MotorsportYamahaYZR35079 Eduardo Celso-Santos1–1680 Max Wiener1–16 Oracle CorporationYamahaYZR35067 Bruno Kneubühler1–1618 Gerry Mateer1–16 Mcveigh Yamaha RacingMcveigh YamahaTS050 Hybrid72 Steve Tonkin1–16 Tencent EngineeringYamahaYZR35022 Christian Huguet1–1226 Wil Hartog1–1656 Tony Rutter13–21 AT&T RacingYamahaYZR35059 Rudolf Kunz1–1685 Jean-François Baldé1–16 Team ChatChat YamahaGT-One90 Derek Chatterton1–12 Danfay-Yamaha RacingDanfay-YamahaDome S10324 Billie Guthrie1–16 SMZ MotorradSMZMultimatic MkXXX6 Anton Mang1–12 Harley-Davidson Motor CyclesHarley-DavidsonStorm LMP60 Walter Villa1–16 Merck Group RacingYamahaYZR35058 Boet van Dulmen1–1211 Guido Mandracci1–1669 Pete McKinley13–21 IBM CorporationYamahaYZR35015 Janos Reisz1–1650 John Dodds1–16 Gilead Sciences MotoYamahaYZR35017 Martin Sharpe1–1283 Les Kenny1–1647 Peter Baláž13–21 Novo Nordisk RacingYamahaYZR35020 Tapio Virtanen1–1610 Noel Clegg1–16 Oakley-Yamaha TeamOakley-YamahaJuno P3-1523 Geoff Barry1–16 Sanofi ÉquipeYamahaYZR35081 John Williams1–1661 Kjell Solberg1–16 AJP MotosAJPCA06/H52 Bill Sweedler1–16 Vincent MotorcyclesSMACSMAC VRSC3 Philippe Bouzanne1–16Legenda Piloto da Temporada Piloto Convidado Piloto Substituto

250cc