Replace these lines in "GtavDir\common.rpf\data\handling.meta"

<Item type="CHandlingData">
      <handlingName>BMX</handlingName>
      <fMass value="105.000000" />
      <fInitialDragCoeff value="60.000000" />
      <fPercentSubmerged value="200.000000" />
      <vecCentreOfMassOffset x="0.000000" y="0.000000" z="-0.100000" />
      <vecInertiaMultiplier x="1.000000" y="1.000000" z="1.000000" />
      <fDriveBiasFront value="0.000000" />
      <nInitialDriveGears value="1" />
      <fInitialDriveForce value="0.160000" />
      <fDriveInertia value="1.000000" />
      <fClutchChangeRateScaleUpShift value="1.000000" />
      <fClutchChangeRateScaleDownShift value="1.000000" />
      <fInitialDriveMaxFlatVel value="50.000000" />
      <fBrakeForce value="3.000000" />
      <fBrakeBiasFront value="0.600000" />
      <fHandBrakeForce value="0.900000" />
      <fSteeringLock value="40.000000" />
      <fTractionCurveMax value="1.850000" />
      <fTractionCurveMin value="1.800000" />
      <fTractionCurveLateral value="20.000000" />
      <fTractionSpringDeltaMax value="0.030000" />
      <fLowSpeedTractionLossMult value="0.000000" />
      <fCamberStiffnesss value="0.000000" />
      <fTractionBiasFront value="0.470000" />
      <fTractionLossMult value="0.000000" />
      <fSuspensionForce value="8.500000" />
      <fSuspensionCompDamp value="8.000000" />
      <fSuspensionReboundDamp value="8.600000" />
      <fSuspensionUpperLimit value="0.080000" />
      <fSuspensionLowerLimit value="-0.050000" />
      <fSuspensionRaise value="-0.007000" />
      <fSuspensionBiasFront value="0.500000" />
      <fAntiRollBarForce value="0.000000" />
      <fAntiRollBarBiasFront value="0.000000" />
      <fRollCentreHeightFront value="0.150000" />
      <fRollCentreHeightRear value="0.150000" />
      <fCollisionDamageMult value="0.500000" />
      <fWeaponDamageMult value="1.000000" />
      <fDeformationDamageMult value="0.800000" />
      <fEngineDamageMult value="1.500000" />
      <fPetrolTankVolume value="0.000000" />
      <fOilVolume value="0.000000" />
      <fSeatOffsetDistX value="0.000000" />
      <fSeatOffsetDistY value="0.000000" />
      <fSeatOffsetDistZ value="0.200000" />
      <nMonetaryValue value="12000" />
      <strModelFlags>441010</strModelFlags>
      <strHandlingFlags>1101</strHandlingFlags>
      <strDamageFlags>20</strDamageFlags>
      <AIHandling>AVERAGE</AIHandling>
      <SubHandlingData>
        <Item type="CBikeHandlingData">
          <fLeanFwdCOMMult value="0.000000" />
          <fLeanFwdForceMult value="28.000000" />
          <fLeanBakCOMMult value="0.000000" />
          <fLeanBakForceMult value="17.000000" />
          <fMaxBankAngle value="20.000000" />
          <fFullAnimAngle value="28.000000" />
          <fDesLeanReturnFrac value="0.140000" />
          <fStickLeanMult value="1.000000" />
          <fBrakingStabilityMult value="-8.000000" />
          <fInAirSteerMult value="-9.000000" />
          <fWheelieBalancePoint value="10.000000" />
          <fStoppieBalancePoint value="-10.000000" />
          <fWheelieSteerMult value="-0.500000" />
          <fRearBalanceMult value="45.000000" />
          <fFrontBalanceMult value="145.000000" />
          <fBikeGroundSideFrictionMult value="1.400000" />
          <fBikeWheelGroundSideFrictionMult value="1.100000" />
          <fBikeOnStandLeanAngle value="6.300000" />
          <fBikeOnStandSteerAngle value="0.300000" />
          <fJumpForce value="4.000000" />
        </Item>
        <Item type="NULL" />
        <Item type="NULL" />
      </SubHandlingData>
    </Item>