The motor top-2 rate is the share of past races in which that motor finished in the top 2. In Toda 1R on January 8, 2026, Boat 1's motor had the highest rate among the six motors at 46.85%, while Boat 6's had the lowest at 30.23%.
You can compare the six motors in today's race in Motor Condition. Select a race to see bars for the six official top-2 rates as of the start of the meet, alongside each motor's rank at the venue.
Motor top-2 rate = top-2 finishes ÷ starts; race card values are set on the first day of the meet
The motor top-2 rate is the total number of 1st- and 2nd-place finishes divided by that motor's starts. The top-3 rate includes finishes through 3rd place. Official race card values are cumulative from the motor's first use and exclude finishes in the current meet (BOAT RACE's official explanation of race card statistics).
| Item | Official motor top-2 rate (race card value) |
|---|---|
| What it measures | That motor's top-2 finishes ÷ starts |
| Coverage | Cumulative from first use; excludes finishes in the current meet |
| When it changes | On the first day of a meet; the value stays the same during the meet |
| New motors | All boats show 0% in the first meet; values appear from the first day of the second meet |
| Decimal places | Two (e.g. 46.85%) |
A new motor showing 0% in its first meet does not mean it has never finished in the top 2. It means no official cumulative value has been assigned yet. During this period, Ryujin Radar shows a top-2 rate calculated from its races at that venue in the "Top-2 rate (as of meet start)" column, marked with "※".
Example: comparing racer and motor top-2 rates for the six boats in Toda 1R
These are the public race card values for Toda 1R on January 8, 2026. The national top-2 rate describes the racer, while the motor top-2 rate and boat top-2 rate describe the equipment.
| Boat # | Class | National top-2 rate (racer) | Motor top-2 rate | Rank among six motors | Boat top-2 rate |
|---|---|---|---|---|---|
| Boat 1 | A1 | 48.53% | 46.85% | 1st | 30.34% |
| Boat 2 | A1 | 52.87% | 32.32% | 4th | 36.56% |
| Boat 3 | A2 | 44.33% | 31.18% | 5th | 52.63% |
| Boat 4 | B1 | 37.66% | 38.89% | 2nd | 36.67% |
| Boat 5 | A2 | 33.64% | 35.51% | 3rd | 34.02% |
| Boat 6 | B2 | 2.04% | 30.23% | 6th | 28.89% |
Boat 6's racer has a national top-2 rate of 2.04%, yet its motor top-2 rate is 30.23%. The motor top-2 rate comes from the finishes of the racers who have used that motor, rather than the record of the racer using it today. Boat 2's racer has the highest national top-2 rate of the six at 52.87%, while its motor ranks 4th at 32.32%. When the racer and equipment columns give different rankings, read them separately.
The official race card shows percentages alone, without the number of starts behind them.
National, local, motor, and boat top-2 rates: what is different?
| Column | Whose or what record? | Coverage |
|---|---|---|
| National top-2 rate | The racer's share of top-2 finishes nationwide | The past six months, including the month of the meet's first day |
| Local top-2 rate | The racer's share of top-2 finishes at that venue | Results at that venue (coverage follows the official explanation of the statistics) |
| Motor top-2 rate | The motor's (engine's) share of top-2 finishes | Cumulative from first use |
| Boat top-2 rate | The boat's (hull's) share of top-2 finishes | That boat's past races |
Motors and boats are assigned to racers by lottery for each meet. The motor is the engine; the boat is the hull carrying it. They are assigned in separate draws. The national top-2 rate's coverage follows the official explanation linked above.
Reading Motor Condition: list columns and what opens when you tap a row
The Motor Condition list has the following columns from left to right. The data comes from three sources, so check who provides each value and when it changes.
| Column | Contents | Source and update timing |
|---|---|---|
| Boat #, racer name, motor number | The six boats and their motor numbers | Race card |
| Official top-2 (series start) | The race card's motor top-2 rate; the highest of the six sets the full bar length | BOAT RACE official data; set on the first day of the meet and unchanged during it |
| Venue rank | Rank among all motors at the venue, shown as rank / total motors | Motor records from each venue's official website; updated at the end of a meet. Not shown for Toda, Heiwajima, Hamanako, or Miyajima |
| Top-2 and top-3 rates (past 90 days, etc.) | This motor's top-2 and top-3 rates for the selected period (past 90 days or past month) | Ryujin Radar calculations; excludes races before motor replacement |
| Pre-meet test | Pre-meet test time | BOAT RACE official data; unchanged during the meet |
| 1st-place rate, finals appearances, championships | This motor's share of 1st-place finishes, finals appearances, and final wins | Each venue's official website; updated at the end of a meet. Columns are omitted where the venue's official website has no values |
| Power index | Average difference between whether this motor finished in the top 2 and the national top-2 rate of the racer using it at the time | Ryujin Radar calculations for the selected period |
The list uses three markers. A gold border marks the motor with the highest official top-2 rate in this race. A beige background marks the best value in that column. "※" marks a motor with no official top-2 rate yet; tap it to see how many starts the displayed value is based on.
Like a racer's national top-2 rate, a motor top-2 rate also reflects the skill of the racers who used it. A motor used by skilled racers in succession tends to have a higher top-2 rate; the Power Index subtracts that contribution. A larger positive value means the motor has performed above its racers' skill level. Venue ranks use values from the venue's official website, while the bars use official race card top-2 rates. Because the sources differ, bar lengths and ranks can be in reverse order in some races.
Tap a row to open details for that motor.
| What opens | What it shows |
|---|---|
| Motor freshness | How many starts and meets this motor has had (values from the venue's official website) |
| Top-2 and top-3 rate trends (official cumulative values) | Official values across meets; the chart forms steps because values stay unchanged during a meet |
| Exhibition time trend | Changes in this motor's exhibition times; higher on the chart means faster |
| Results by lane | This motor's 1st-place, top-2, and top-3 rates for each course it actually started from |
| Usage history | Racers who used this motor in the past 90 days, with finishes and top-2 rates by meet |
| Parts and propeller replacement history | Replacement dates and a comparison of average exhibition times before and after replacement |
For how to read replacement history, see Why motor top-2 rate alone is not enough.
Comparing 1st-place rates by motor top-2 rate rank and exhibition time rank
When comparing 1st-place finishes using motor data, group motors by rank among the six rather than the top-2 percentage itself. The statistics below also group boats by rank within the race, so using ranks among the six on screen gives you the same basis for comparison.
Ryujin Radar's calculations below show Boat 1's 1st-place finishes, grouped by its motor top-2 rate rank and exhibition time rank. The sample is nationwide races with boats starting in boat-number order from April 1, 2019 to September 26, 2026, restricted to the level-line start pattern in which all six boats started together (47,320 races).
| Boat 1's rank among the six | Grouped by motor top-2 rate rank | Grouped by exhibition time rank |
|---|---|---|
| 1st–2nd | 17,185 races: 11,773 wins (68.5%) | 25,445 races: 18,088 wins (71.1%) |
| 3rd–4th | 15,313 races: 10,154 wins (66.3%) | 13,873 races: 8,671 wins (62.5%) |
| 5th–6th | 14,762 races: 9,407 wins (63.7%) | 8,002 races: 4,615 wins (57.7%) |
For Boat 1 in level-line starts, the 1st-place rates were 68.5% and 63.7% for motor top-2 rate ranks 1st–2nd and 5th–6th, compared with 71.1% and 57.7% for the same exhibition time ranks. Higher ranks had more 1st-place finishes for both measures, with a larger gap for exhibition time ranks. In patterns with an attacking boat, such as Boat 4 attacking from Kado (course 4 entry), the attacking boat's 1st-place rate gap between higher and lower ranks was 4–8 percentage points for motor top-2 rate ranks and 9–18 percentage points for exhibition time ranks. The gap was larger for exhibition time ranks across all seven start patterns.
The screen's "1st-place rate" column comes from the venue's official website and combines all starting courses, so it mixes the courses from which the motor was used. To compare without course differences, tap a row and compare 1st-place rates for the same course under "Results by lane."
For a deeper point, within the six boats in the same race, the correlation between motor top-2 rate and exhibition time was weak at 0.115. Correlations with original exhibition lap time and turning time were 0.051 and 0.007, respectively, indicating almost no relationship (2,844 races nationwide from September 22 to October 11, 2026). The motor top-2 rate is a historical value set on the first day of the meet, while exhibition time measures today's performance, so treat them as separate inputs. For exhibition times, see How long before a race is the exhibition? Reading exhibition times.
Steps for checking motor top-2 rates in today's races
- Select today's race in Motor Condition and check the six official top-2 rates as of meet start and venue ranks. During a new motor's first meet, the heading changes to "Top-2 rate (as of meet start)," and values calculated by Ryujin Radar carry "※".
- Compare them with the race card's national top-2 rates and mark boats whose racer and motor rankings diverge. As with Boat 6 in the example, the motor top-2 rate is determined separately from today's racer's record.
- Check the Power Index to identify motors that remain positive after subtracting the skill of the racers who used them.
- Once exhibition times are available, check exhibition time ranks before motor top-2 rate ranks. As the table above shows, exhibition time ranks had a larger gap in 1st-place rates.
- See all motors at the venue in Motor Rankings. For how to distinguish win rate and top-2 rate, see What is the AI index? Comparing win rate and top-2 rate.
FAQ
What is the top-2 rate? How does it differ from the top-3 rate?
The top-2 rate is the share of finishes in the top 2; the top-3 rate is the share in the top 3. Comparing top-2 rates for bets covering the first two places, such as Exacta and Quinella, and top-3 rates for bets covering the first three, such as Trifecta and Trio, aligns the finish range with the bet type.
What is the boat top-2 rate? How does it differ from the motor top-2 rate?
The boat top-2 rate is the share of top-2 finishes for the hull carrying the engine. It is assigned in a separate lottery from the motor. In Ryujin Radar's calculations of nationwide races where all six racers were A1, the differences in top-2 and top-3 finish rates between the highest and lowest boat top-2 rates were 0–3 percentage points.
Why can the top-2 rate beside a venue rank differ from the list's top-2 rate by 0.1?
The top-2 rate beside a venue rank comes from the venue's official website and is displayed with the second decimal place truncated.
Why can't I select a period when opening a past race?
For past races, motor records use the official values as of the race card. The Power Index appears in the list only for today's races. Tap a row to see its value up to immediately before that race.
Why is no trend shown for a motor with the same number?
Motors are replaced roughly once a year at each venue, and new motors inherit the numbers. A motor in a race before replacement is different from the current motor with the same number, so trends, Power Index, and usage history are not shown.
Data coverage and cautions
The example table uses public race card values for Toda 1R on January 8, 2026; ranks among the six motors were derived from those table values. The rankings and 1st-place statistics cover only races where all boats started from the course matching their boat number, and motor top-2 rates are the values as of the race card. Counts grouped by motor top-2 rate rank include only races with values for all six boats, so their total is below the 47,320 level-line races. Tied values receive the better rank, which increases the number of races in exhibition time ranks 1st–2nd. The 0–3 percentage point gaps for boat top-2 rate concern top-2 and top-3 finishes in nationwide races with all six racers A1; their coverage and finish range differ from the motor 1st-place statistics. Correlations such as 0.115 are from 2,844 races between September 22 and October 11, 2026. Past rates do not promise today's finishing order.