Question 1

What is MotoQuant?

Accepted Answer

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.

Question 2

How accurate is the quarter-mile prediction?

Accepted Answer

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.

Question 3

Which bikes are included?

Accepted Answer

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.

Question 4

Is MotoQuant free?

Accepted Answer

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.

Question 5

Can I use it for Indian drag strips?

Accepted Answer

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.

Question 6

How does it decide which parts are worth buying?

Accepted Answer

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.

Question 7

Who answers chat questions, and can I use my own key?

Accepted Answer

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.

Question 8

Can I upload my own Dragy or dyno data?

Accepted Answer

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.

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