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

Riders

Tatsuya Yamaguchi

Nationality: Japan
Number: 99
Team (2010 Moto2): Gresini Racing Moto2
Bike: Chassis Moriwaki / Engine Honda
Born: February 11, 1976(age 50)
Birthplace: Shiki-City

Photos (4)

2010
At this race · motoracereports · CC BY 3.0
2016
Norio NAKAYAMA from saitama, japan · CC BY-SA 2.0
2016
Norio NAKAYAMA from saitama, japan · CC BY-SA 2.0
2016
Norio NAKAYAMA from saitama, japan · CC BY-SA 2.0

Freely licensed photos from Wikimedia Commons. Tap a photo for its source page (photographer, licence). The year is when it was taken.

Birth date and place from the official rider profile

Career

Made a Grand Prix debut in 250cc at Motegi in 1999.

In 250cc (1999): 1 starts, 0 wins, 0 podiums. In Moto2 (2010): 1 starts, 0 wins, 0 podiums. Teams: Gresini Racing Moto2.

In all, 2 Grand Prix starts, 0 wins and 0 podiums (within the official results database).

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

Season by season

250ccMoto2 ★ Champion

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

Scope: official results DB, 1999–2010 (the rider's racing years)

Totals

250cc1999–1999

Win rate0.0%

Podium rate0.0%

Average finish (when classified)avg P6.0

10 pts · Poles 0

Moto22010–2010

Win rate0.0%

Podium rate0.0%

Average finish (when classified)avg P25.0

0 pts · Poles 0

Points are counted per class, never added across classes. Tap a number for the list of races | Scope: official results DB, 1999–2010 (the rider's racing years)

Against the greats, and the class of their debut

Grand Prix debut in 1999. Of the 51 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 2 races · 250cc / Moto2

By circuit (best average first)Small sample

Motegi250cc 1avg P6.0

MisanoMoto2 1avg P25.0

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.

Moto2 1 races · 2010

Moto2: all in the Dunlop era; Dry races only; always on the grid Grid 16〜; one circuit only.

250cc 1 races · 1999

250cc: all in the Multiple suppliers era; no track-condition records; always on the grid Grid 7–9; one circuit only.

Fewer than 30 races: small sample (dashed). Average finish counts classified finishes only | Scope: official results DB, 1999–2010 (the rider's racing years)

Distance ridden and distance travelled

Counted from 1949 (lap lengths before 1998 researched from published sources: estimates)

Ridden on the bike

Every session

at least 357 miles
0.0× around the Earth · 133 laps

Time on the bike: at least 4 hours (0.1 days)
Average 134.3 km/h, top 235 km/h
Time and average speed only from 2010–2010, the seasons with every session's lap analysis

Travelled between circuits

at least 5,978 miles
0.2× around the Earth · at least 0.5 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, 1999–2010 (the rider's racing years)