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As of round 17 Race · updated 10/13/2026, 07:18 PM (Japan time)

Riders

Adu Celso-santos

No freely licensed photo found, so the race number and team colour are shown instead. About photos

Nationality
Brazil Brazil
Bike
Yamaha
Born
August 7, 1945(age 81)

Birth date and place from the official rider profile

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Career

Made a Grand Prix debut in 350cc at Clermont-Ferrand in 1972.

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In 350cc (1972–1973): 4 starts, 0 wins, 0 podiums. In 250cc (1973): 2 starts, 0 wins, 0 podiums. In 350cc (1973–1975): 6 starts, 1 wins, 2 podiums. In 500cc (1975): 1 starts, 0 wins, 0 podiums.

First podium: Jarama 1973 (350cc). First win: Jarama 1973 (350cc).

In all, 13 Grand Prix starts, 1 wins and 2 podiums (within the official results database).

Written automatically from the official results database (no opinions about the rider)

Note: these totals are incomplete. The official data has no result for 3 races in seasons and classes this rider raced in; they are not counted: 1973 250cc (TT) / 1974 350cc (TT) / 1975 500cc (TT)

Season by season

350cc250cc500cc ★ Champion

11020304019721973197419751972 350cc: P15 / 12 pts / 0 wins1973 350cc: P7 / 33 pts / 1 wins1974 350cc: P47 / 2 pts / 0 wins1975 350cc: P18 / 12 pts / 0 wins350cc1973 250cc: P12 / 20 pts / 0 wins250cc1975 500cc: P45 / 2 pts / 0 wins500cc

The strip shows each year's team (team colour). Tap for team and machine

Scope: official results DB, 1972–1975 (the rider's racing years); excludes 3 races with no official result data

Totals

250cc1973–1973
Win rate0.0%
Podium rate0.0%
Average finish (when classified)avg P6.0

20 pts · Poles 0

Includes 10 points from races with no result in the official records (counted from the official standings).

1 of these races have no result in the official data; their results come from the Italian Wikipedia.

350cc1972–1975
Win rate10.0%
Podium rate20.0%
Average finish (when classified)avg P6.3

59 pts · Poles 0

Includes 4 points from races with no result in the official records (counted from the official standings).

500cc1975–1975
Win rate0.0%
Podium rate0.0%
Average finish (when classified)avg P9.0

2 pts · Poles 0

Points are counted per class, never added across classes. Tap a number for the list of races | Scope: official results DB, 1972–1975 (the rider's racing years); excludes 3 races with no official result data

Against the greats, and the class of their debut

Grand Prix debut in 1972. Of the 78 riders who debuted that year, 0 also raced in 2026.

Greats: 2+ world titles or 30+ MotoGP / 500cc wins. Up to 4 who shared 10+ races, most titles first. A finisher counts as ahead of a non-finisher.

Results by condition (races)

All classes 14 races · 250cc / 350cc / 500cc

By circuit (best average first)Small sample

Salzburgring350cc 1avg P3.0
Montjuïc350cc 1avg P4.0
Jarama350cc 2 · 250cc 1avg P5.0
Anderstorp350cc 1avg P5.0
Opatija250cc 1 · 350cc 1avg P5.5
Assen250cc 1avg P6.0
Clermont-Ferrand350cc 1avg P7.0
Imola350cc 1avg P9.0
Hockenheim500cc 1avg P9.0
Paul Ricard350cc 1avg P10.0
Brno350cc 1avg P10.0

Average finish across classes (Moto3, Moto2, MotoGP and so on together). See each class below for class-only figures. Only circuits with 3+ races count as a best track.

500cc 1 races · 1975

500cc: all in the Multiple suppliers era; no track-condition records; no grid records; one circuit only.

350cc 10 races · 1972–1975

By tyre eraSmall sample

Win rate
Podium rate
Average finish (when classified)

By circuit (best average first)Small sample

Salzburgring1 racesavg P3.0
Montjuïc1 racesavg P4.0
Jarama2 racesavg P5.0
Anderstorp1 racesavg P5.0
Opatija1 racesavg P5.0
Clermont-Ferrand1 racesavg P7.0
Imola1 racesavg P9.0
Paul Ricard1 racesavg P10.0
Brno1 racesavg P10.0

350cc: no track-condition records; no grid records.

250cc 3 races · 1973

By circuit (best average first)Small sample

Opatija1 racesavg P6.0
Assen1 racesavg P6.0
Jarama1 races—

250cc: all in the Multiple suppliers era; no track-condition records; no grid records.

Fewer than 30 races: small sample (dashed). Average finish counts classified finishes only | Scope: official results DB, 1972–1975 (the rider's racing years); excludes 3 races with no official result data

Distance ridden and distance travelled

Counted from 1949 (lap lengths before 1998 researched from published sources: estimates)1 races with an estimated lap length

Ridden on the bike

Every session

at least 80 miles
0.0× around the Earth · 19 laps

Travelled between circuits

at least 502 miles
0.0× around the Earth · at least 0.1 days

From 1949. Every session in the seasons with the lap analysis documents, races only before. Tests not included. Laps × that year's lap length.A minimum, calculated from straight-line distances between circuits. Connections, tests and trips home are not included, so the real figures are longer.

Every race

No season as a regular (starting at least half of the races)

? How the estimate is made

Estimate = average of the last 3 races before each absence

Seasons in which at least half of the races were started | Scope: official results DB, 1972–1975 (the rider's racing years); excludes 3 races with no official result data

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