Free and open source
Know your quarter-mile time before you race.
Pick your bike to see the time it should run and which changes would make it quicker.
Checked against 250 published quarter-mile tests.
Try it now
Choose a bike and get its quarter-mile time.
Choose a bike
You and the conditions
Adjusts for altitude and weather.
Start here
What do you want to do?
See how fast my bike is
Pick a bike and get its quarter-mile time, finish-line speed and top speed.
Find the best parts for my budget
Tell us how much you want to spend. We test every compatible part and pick the combination that makes the bike quickest.
Get a race-day setup
Gearing, launch RPM and tyre pressure that suit the air and altitude where you are racing.
Compare two bikes
Race any two bikes head to head. Open the simulator, switch to Advanced and choose Compare.
How it works
Three steps to your number
Step 1: Pick your bike
Choose from 534 bikes, from a Pulsar NS200 to a Hayabusa. Each has its own gearing, weight, aerodynamics and power curve.
Step 2: Say where you are racing
Optional. Altitude, heat and humidity change how much power an engine makes, so a result at Aamby Valley is not the same as one at the coast.
Step 3: Read your time, then try upgrades
You get your quarter-mile time in plain words. Then see which parts, gearing and setup would make it quicker, and what each tenth of a second costs.
Accuracy
Can I trust the numbers?
For sport bikes, yes. Across 263 matches with published tests (Cycle World, Sport Rider, MotoStatz Dragy runs and others), the simulator is off by 0.25 s on average, and by less on sport bikes. Every miss is published.
- 250
- published tests checked
- 72
- within 0.10 s
- 130
- within 0.20 s
- ±0.006 s
- average error, 10 best
Where it is strongest
Weaker areas: small bikes, two-strokes and cruisers are less well covered by published tests, so their results carry a wider margin. Small bikes are the weakest class: their gearing in the catalog is still inferred, and fixing it needs a re-tune. See the full accuracy report.
The 10 closest matches
Published time against MotoQuant’s time for the same bike.
| Bike | Published | MotoQuant | Difference | Source |
|---|---|---|---|---|
| Kawasaki Ninja ZX-10R2011 · 998 cc | 10.08 s | 10.08 s | −0.001 s | Sport Rider, July 2011 |
| Aprilia RS 660 Factory2025 · 659 cc | 11.24 s | 11.24 s | +0.004 s | MotoStatz (Dragy) |
| Yamaha FZ6 Fazer2004 · 600 cc | 11.53 s | 11.53 s | +0.005 s | Cycle World 2004 |
| BMW M 1000 RR2021 · 999 cc | 9.80 s | 9.81 s | +0.005 s | Cycle World 2021 |
| BMW S 1000 RR2019 · 999 cc | 9.85 s | 9.84 s | −0.005 s | Cycle World 2019 |
| Yamaha RD3501973 · 347 cc | 14.30 s | 14.31 s | +0.006 s | Cycle World (period test) |
| Yamaha VMAX 17002009 · 1679 cc | 10.30 s | 10.31 s | +0.006 s | Cycle World 2009 |
| Suzuki SV650X2018 · 645 cc | 12.10 s | 12.11 s | +0.007 s | motorcyclespecs.com |
| Triumph Speed Triple 10502005 · 1050 cc | 11.01 s | 11.02 s | +0.009 s | Sport Rider 2005 |
| Yamaha MT-102016 · 998 cc | 10.35 s | 10.36 s | +0.011 s | Cycle World 2016 |
Open source
Free, and anyone can improve it
MotoQuant is released under the Apache License 2.0. The simulator, the bike catalog and the accuracy checks are all public: read the maths, correct a number or run your own copy.
Read the code
Every line of the simulator and the site, on GitHub.
Suggest a bike
Missing a model? Send its specifications and a source.
Submit a timeslip
Send a real run. Each one we check and add improves the numbers.
Read the physics
How the simulation works, step by step, in plain language.
What is inside:534 bikes,546 parts,254 tyres,20 venues.
FAQ
Common questions
What is MotoQuant?
MotoQuant is a free simulator that predicts how fast a motorcycle runs the quarter mile. Pick one of 534 bikes and it shows the time, the speed at the finish line and the splits. The physics is checked against published tests.
How accurate is the quarter-mile prediction?
Across 263 matches with published magazine tests and Dragy runs, the simulated time is off by 0.25 s on average (weighted by how trustworthy each source is), and 130 land within 0.20 s of the published time. Sport bikes do best; small bikes are less well covered by published tests and carry a wider margin. The three reference bikes, simulated at sea level: Suzuki GSX-R1000 K5 10.04 s against 9.97 s in Cycle World; Yamaha YZF-R1 10.11 s against 10.30 s in Sport Rider; Suzuki Hayabusa 10.11 s against 10.40 s in Cycle World.
Which bikes are included?
The catalog covers 534 bikes from 33 makers: Suzuki, Yamaha, Honda, Kawasaki, BMW, Ducati, Aprilia, KTM, Triumph, Royal Enfield, Bajaj, TVS, Hero, Harley-Davidson, Indian, CFMoto, Benelli, Husqvarna, MV Agusta, Moto Guzzi, Buell and more. That includes Indian 200–400 cc bikes (Pulsar, Apache, R15 V4), South-East Asian underbones, 400 cc four-cylinder bikes, retro flagships and 21 two-strokes (RD350, RX100, RGV250, H2 Mach IV). Missing yours? Suggest it from the bike list.
Is MotoQuant free?
Yes. MotoQuant is free and open source under the Apache License 2.0. There is no account to create: saved runs stay in your browser. motoquant.in is a free public copy of the project, and you can also run your own from the GitHub repository.
Can I use it for Indian drag strips?
Yes. MotoQuant was built for the Indian drag racing community. It knows Aamby Valley (Pune), Madras Motor Race Track (Chennai), Buddh International Circuit (Greater Noida), Kari Motor Speedway (Coimbatore) and Hyderabad, plus 15 venues abroad, and adjusts for each place’s altitude and weather. Parts prices are in rupees with GST and import duty already included.
How does it decide which parts are worth buying?
Each part in the 546-part catalog is tested by running the simulation with and without it. The change in quarter-mile time is divided by the part’s price to get the cost of each tenth of a second. The best-parts tool then picks the combination that gains the most within your budget, following the compatibility rules and known pairings such as exhaust plus ECU flash.
Who answers chat questions, and can I use my own key?
The chat assistant is Claude, made by Anthropic, so your questions are sent to Anthropic. Pick the mechanic (Claude Sonnet 5.5) for quick answers or the doctor (Claude Opus 5.5) to dig deeper. Asking is free up to a daily limit. You can also add your own Anthropic API key under “Use your own key”: it stays in your browser, is sent with your questions to answer them, and is never stored on our server.
Can I upload my own Dragy or dyno data?
Yes. MotoQuant reads Dragy GPS logs (CSV or VBO) and DynoJet or MoTeC dyno sheets, corrects dyno numbers for the day’s air, and lines your real run up against the simulation: finish time, finish-line speed and split-by-split differences for your own bike. The file is read, compared and deleted; nothing is kept.