# V2 Bike Racing

Section 108 defines motorcycle physics, bike-on-bike combat, bike classes, bike
race modes, bike customization, and mixed bike-vs-car racing.

## Bike Physics

Lean angle is the primary turn input. Each bike has a per-bike lean limit and
lean-recovery rate. Throttle-back and weight-shift inputs tune cornering.

Wheelie and stoppie input combos are available. High-speed instability makes a
faster bike produce more wobble at max-lean.

## Bike Combat

Bike-on-bike combat uses a street-racer ruleset. The rider can punch, kick, and
elbow an adjacent rider at speed. Each hit causes stagger and lean-loss.

Extreme hits trigger a knockdown cinematic. The bike continues riderless briefly
and then crashes.

## Bike Classes

Bike class library entries are Sport Bike, Cruiser, Naked Sport, Adventure,
Supermoto, and Electric. Sport Bike is litre-class track-focused, Cruiser is
heavy with lower speed but stable, Naked Sport is mid-weight track-friendly,
Adventure is off-road capable, Supermoto is urban agile, and Electric is silent
with high torque.

## Bike Race Modes

Bike race modes are Circuit Bike, Sprint Bike, Drag Bike, Drift Bike, Off-Road
Bike, Bike Pursuit, and Bike Combat Racing. Drift Bike has limited sliding rear
tire behavior. Bike Pursuit is cops on bikes vs racer bikes. Bike Combat Racing
cross-references Section 104 combat racing.

## Customization

Bike customization slots are tank, fairing, wheels, exhaust, seat, handlebars,
rider helmet, leathers, and boots. Each bike has a per-bike eligible kit list.

## Mixed-Class Racing

Mixed-class race options allow bikes and cars in the same race. The per-class
handicap gives bikes +25% acceleration vs car to balance mixed grids.

## Verification

`BikeRacing_V2_Contract.json`, `bike-racing.json`, the `RaceModes.Module`
automation spec, and `check-v2-bike-racing.py` validate Section 108.