# 1978 Nations motorcycle Grand Prix

The 1978 Nations motorcycle Grand Prix was the fifth round of the 1978 Grand Prix motorcycle racing season. It took place on the weekend of 12–14 May 1978 at the Autodromo Internazionale del Mugello.

## Classification
### 500 cc

| Pos. | Rider | Team | Manufacturer | Time/Retired | Points |
| 1 | Kenny Roberts | Yamaha Motor Company | Yamaha | 59'17.000 | 15 |
| 2 | Pat Hennen | | Suzuki | +6.200 | 12 |
| 3 | Marco Lucchinelli | Cagiva Corse | Suzuki | +35.500 | 10 |
| 4 | Steve Baker | Team Gallina Nava Olio Fiat | Suzuki | +40.400 | 8 |
| 5 | Barry Sheene | Texaco Heron Team Suzuki | Suzuki | +51.400 | 6 |
| 6 | Wil Hartog | Riemersma Racing | Suzuki | +1'07.500 | 5 |
| 7 | Tepi Länsivuori | | Suzuki | +1'16.300 | 4 |
| 8 | Philippe Coulon | Marlboro Nava Total | Suzuki | +2'04.100 | 3 |
| 9 | Boet van Dulmen | | Suzuki | +2'04.700 | 2 |
| 10 | Gianni Rolando | Team Librenti | Suzuki | +1 lap | 1 |
| 11 | Nico Cereghini | | Suzuki | +1 lap | |
| 12 | Graziano Rossi | Team Gallina Nava Olio Fiat | Suzuki | +1 lap | |
| 13 | Franz Rau | Kazenmaier Autovermietung | Suzuki | +1 lap | |
| 14 | Alex George | | Suzuki | +1 lap | |
| 15 | Roberto Coli | | Suzuki | +1 lap | |
| Ret | Carlo Perugini | | Suzuki | Accident | |
| Ret | Carlos Delgado de San Antonio | | Suzuki | Accident | |
| Ret | Carlo Paganini | | Suzuki | Retired | |
| Ret | Bruno Kneubühler | RSS Racing Team | Suzuki | Retired | |
| Ret | Lorenzo Ghiselli | | Suzuki | Retired | |
| Ret | Virginio Ferrari | Team Gallina Nava Olio Fiat | Suzuki | Retired | |
| Ret | Johnny Cecotto | Yamaha Motor Company | Yamaha | Accident | |
| Ret | Michel Rougerie | | Suzuki | Retired | |
| Ret | Pieraldo Cipriani | | Paton | Clutch | |
| Ret | Steve Parrish | | Suzuki | Retired | |
| Ret | Christian Estrosi | | Suzuki | Retired | |
| Ret | Gregorio Mariani | | Suzuki | Retired | |
| Ret | Jack Findlay | | Suzuki | Retired | |
| Ret | Christian Estrosi | | Suzuki | Retired | |
| Ret | Takazumi Katayama | Sarome & Motul Team | Yamaha | Retired | |
| Ret | Børge Nielsen | | Suzuki | Retired | |
| DNS | Sergio Pellandini | | Suzuki | Did not start | |
| Sources: ||||||

### 350cc

| Pos | Rider | Manufacturer | Laps | Time | Grid | Points |
| 1 | Kork Ballington | Kawasaki | 25 | 54:08.0 | 7 | 15 |
| 2 | Gregg Hansford | Kawasaki | 25 | +0.4 | 11 | 12 |
| 3 | Takazumi Katayama | Yamaha | 25 | +15.9 | 2 | 10 |
| 4 | Michel Rougerie | Yamaha | 25 | +16.2 | 5 | 8 |
| 5 | Franco Uncini | Yamaha | 25 | +41.4 | 1 | 6 |
| 6 | Marco Lucchinelli | Yamaha | 25 | +42.4 | 3 | 5 |
| 7 | Patrick Fernandez | Yamaha | 25 | +1:01.6 | 10 | 4 |
| 8 | Olivier Chevallier | Yamaha | 25 | +1:04.9 | 8 | 3 |
| 9 | Vic Soussan | Yamaha | 25 | +1:24.5 | 12 | 2 |
| 10 | Mario Lega | Morbidelli | 25 | +1:35.9 | 6 | 1 |
| 11 | Tom Herron | Yamaha | 25 | +1:36.0 | 4 | |
| 12 | Pentti Korhonen | Yamaha | 25 | +1:58.0 | | |
| 13 | John Dodds | Yamaha | 25 | +1:59.2 | | |
| 14 | Franco Bonera | Yamaha | 24 | +1 lap | | |
| 15 | Hervé Moineau | Yamaha | 24 | +1 lap | | |
| | Jon Ekerold | Yamaha | | | 9 | |
| 30 starters in total, 19 finishers |||||||

### 250cc

| Pos | Rider | Manufacturer | Laps | Time | Grid | Points |
| 1 | Kork Ballington | Kawasaki | 23 | 50:23.4 | 4 | 15 |
| 2 | Gregg Hansford | Kawasaki | 23 | +0.0 | 2 | 12 |
| 3 | Franco Uncini | Yamaha | 23 | +51.0 | 3 | 10 |
| 4 | Tom Herron | Yamaha | 23 | +1:11.0 | 12 | 8 |
| 5 | Patrick Fernandez | Yamaha | 23 | +1:14.9 | 11 | 6 |
| 6 | Mario Lega | Morbidelli | 23 | +1:15.0 | 5 | 5 |
| 7 | Olivier Chevallier | Yamaha | 23 | +1:21.0 | | 4 |
| 8 | Raymond Roche | Yamaha | 23 | +1:21.7 | | 3 |
| 9 | Jean-François Baldé | Kawasaki | 23 | +1:57.8 | | 2 |
| 10 | Sadao Asami | Yamaha | 23 | +1:57.8 | 7 | 1 |
| 11 | Anton Mang | Kawasaki | 23 | +2:12.2 | 8 | |
| 12 | Sauro Pazzaglia | Yamaha | 23 | +2:13.6 | | |
| 13 | John Dodds | Yamaha | 22 | +1 lap | | |
| 14 | Franco Solaroli | Yamaha | 22 | +1 lap | | |
| 15 | Vic Soussan | Yamaha | 22 | +1 lap | 6 | |
| | Kenny Roberts | Yamaha | | | 1 | |
| | Pentti Korhonen | Yamaha | | | 9 | |
| | Jon Ekerold | Yamaha | | | 10 | |
| 30 starters in total, 19 finishers |||||||

### 125cc

| Pos | Rider | Manufacturer | Laps | Time | Grid | Points |
| 1 | Eugenio Lazzarini | MBA | 20 | 46:25.9 | 1 | 15 |
| 2 | Maurizio Massimiani | Morbidelli | 20 | +26.2 | 8 | 12 |
| 3 | Harald Bartol | Morbidelli | 20 | +29.1 | 11 | 10 |
| 4 | Thierry Espié | Motobécane | 20 | +29.3 | 2 | 8 |
| 5 | Per-Edward Carlson | Morbidelli | 20 | +49.3 | | 6 |
| 6 | Hans Müller | Morbidelli | 20 | +54.7 | 9 | 5 |
| 7 | Ángel Nieto | Bultaco | 20 | +1:18.6 | | 4 |
| 8 | Jean-Louis Guignabodet | Morbidelli | 20 | +1:27.5 | 12 | 3 |
| 9 | Stefan Dörflinger | Morbidelli | 20 | +1:39.3 | 10 | 2 |
| 10 | Enrico Cereda | Morbidelli | 20 | +1:48.9 | | 1 |
| 11 | Bruno Vasetti | Morbidelli | 20 | +2:05.9 | | |
| 12 | Italo Zerbini | Morbidelli | 20 | +3:46.9 | | |
| 13 | Ermanno Giuliano | Morbidelli | 19 | +1 lap | | |
| 14 | Riccardo Russo | Morbidelli | 19 | +1 lap | | |
| 15 | Ivan Palazzese | Morbidelli | 19 | +1 lap | | |
| | Pierluigi Conforti | Morbidelli | | | 3 | |
| | Pierpaolo Bianchi | Minarelli | | | 4 | |
| | Felice Agostini | Morbidelli | | | 5 | |
| | Matti Kinnunen | Morbidelli | | | 6 | |
| | Thierry Noblesse | Morbidelli | | | 7 | |
| 30 starters in total, 21 finishers |||||||

### 50cc

| Pos | Rider | Manufacturer | Laps | Time | Grid | Points |
| 1 | Ricardo Tormo | Bultaco | 12 | 30:39.4 | 1 | 15 |
| 2 | Patrick Plisson | ABF | 12 | +2.1 | 4 | 12 |
| 3 | Julien van Zeebroeck | Kreidler | 12 | +19.4 | 5 | 10 |
| 4 | Rolf Blatter | Kreidler | 12 | +19.7 | | 8 |
| 5 | Stefan Dörflinger | Kreidler | 12 | +20.0 | 3 | 6 |
| 6 | Aldo Pero | Kreidler | 12 | +20.2 | 8 | 5 |
| 7 | Wolfgang Müller | Kreidler | 12 | +37.3 | 7 | 4 |
| 8 | Alberto Jeva | Morbidelli | 12 | +51.9 | 12 | 3 |
| 9 | Salvatore Monreale | Morbidelli | 12 | +54.7 | 11 | 2 |
| 10 | Pierre Dumont | Kreidler | 12 | +1:11.8 | | 1 |
| 11 | Daniel Corvi | Kreidler | 12 | +1:12.4 | | |
| 12 | Claudio Lusuardi | Bultaco | 12 | +1:16.5 | | |
| 13 | Enrico Cereda | DRS | 12 | +1:39.0 | | |
| 14 | Hagen Klein | Kreidler | 12 | +1:55.1 | | |
| 15 | Claudio Granata | Morbidelli | 12 | +1:55.6 | 10 | |
| | Eugenio Lazzarini | Kreidler | | | 2 | |
| | Ingo Emmerich | Kreidler | | | 6 | |
| | Sergio Zattoni | Derbi | | | 9 | |
| 30 starters in total, 21 finishers |||||||

### Sidecar classification

| Pos | Rider | Passenger | Manufacturer | Laps | Time | Grid | Points |
| 1 | Rolf Biland | Kenny Williams | Beo-Yamaha | 20 | 45:40.2 | 2 | 15 |
| 2 | Werner Schwärzel | Andreas Huber | Fath | 20 | +11.5 | 5 | 12 |
| 3 | Jean-François Monnin | Philippe Miserez | Seymaz-Yamaha | 20 | +39.6 | 3 | 10 |
| 4 | Dick Greasley | Gordon Russell | Busch-Yamaha | 20 | +46.6 | 9 | 8 |
| 5 | Bruno Holzer | Karl Meierhans | LCR-Yamaha | 20 | +1:20.1 | 8 | 6 |
| 6 | Yvan Troillet | Pierre Muller | GEP-Yamaha | 20 | +1:26.6 | 7 | 5 |
| 7 | Hermann Schmid | Kenny Arthur | Schmid-Yamaha | 20 | +1:33.2 | | 4 |
| 8 | Jock Taylor | Lewis Ward | Windle-Yamaha | 20 | +1:37.2 | | 3 |
| 9 | Ernst Trachsel | Andreas Stager | TTM-Suzuki | 19 | +1 lap | | 2 |
| 10 | George O'Dell | Cliff Holland | Seymaz-Yamaha | 19 | +1 lap | 6 | 1 |
| 11 | Siegfried Schauzu | Lorenzo Puzo | Busch-Yamaha | 19 | +1 laps | | |
| 12 | Egbert Streuer | Johann van der Kaap | Schmid-Yamaha | 19 | +1 laps | | |
| | Alain Michel | Stu Collins | Seymaz-Yamaha | | | 1 | |
| | Rolf Steinhausen | Wolfgang Kalauch | Seymaz-Yamaha | | | 4 | |
| | Mac Hobson | Ken Birch | Yamaha | | | 10 | |