Cobra 50cc AMA Stock Package: $825

  • Motor and transmission completely disassembled
  • All bearings replaced with higher quality, “stock legal” bearings
  • All bearing bores are measured for proper press fit dimensions and adjusted if necessary
  • New crank seals installed
  • Water pump bearing alignment improved
  • Cylinder is replated and honed to match a new piston
  • Motor reassembled with squish and timing set to our precise specifications
  • Carburetor is disassembled, checked for casting flaws, then re-assembled, re-jetted and float height is set

Cobra 50cc National Mod Package: $1,395

  • Motor and transmission completely disassembled
  • All bearings replaced with higher quality, precision bearings
  • All bearing bores are measured for proper press fit dimensions and adjusted if necessary
  • New crank seals installed
  • Water pump bearing alignment improved
  • Cylinder is bored, replated and honed to match a new 60cc Wiesco piston
  • Cylinder is ported and polished to our race proven specs
  • Cases receive modifications and are blueprinted and matched
  • Cylinder head is reshaped
  • Crank and rod is modified
  • Reed block and carb manifold is modified
  • Includes Mikuni 24mm carb
  • Motor reassembled with squish and timing set to our precise specifications

Additional options:

  • Transmission gears cryo’d and polished   $250
  • Billet intake manifold and custom hoses  $125
*Onsite dyno
*Cobra motor packages do not include new clutch or slipper parts. If these items are needed, you will be contacted during the motor build.