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Repair & Maintenance

400ex jetting

September 20, 2015
Alright guys I’m currently in the stage of completely rebuilding a 400ex motor that was blown up by previous owner because it was never jetted. Bore will be 85.5mm Wiseco 10:1 piston. Curtis sparks exhaust, K&N filter. Where should I start on the needle setting and the pilot and main jets?

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Chains designed for your personality!

Chain Types

  • 415

    • Length
    • Coming Soon!
  • 420 MXG
    • Length
    • 120
    • 132
  • 428 MXG
    • Length
    • 120
    • 132
    • 136
  • 520 ATV
    • Length
    • 64
    • 70
    • 76
    • 78
    • 84
    • 86
    • 88
    • 92
    • 94
    • 96
    • 98
    • 100
    • 104
    • 120
    • 130
  • 520 ORH
    • Length
    • 114
    • 120
  • 520 ORHG
    • Length
    • 114
    • 120
  • 520 MXG
    • Length
    • 64
    • 70
    • 76
    • 78
    • 84
    • 86
    • 88
    • 92
    • 94
    • 96
    • 98
    • 104
    • 110
    • 114
    • 120
    • 150
  • 520 DZO
    • Length
    • 104
    • 114
    • 120
    • 130
  • 520 DZX
    • Length
    • 104
    • 114
    • 120
    • 150
  • 520 SDZZ
    • Length
    • 120
    • 150
  • 525 DZO
    • Length
    • 110
    • 122
    • 150
  • 525 DZX
    • Length
    • 110
    • 122
    • 150
  • 525 SDZ
    • Length
    • 110
    • 122
    • 150
  • 525 SDZZ
    • Length
    • 110
    • 122
    • 150
  • 530 DZO
    • Length
    • 110
    • 120
    • 150
  • 530 DZX
    • Length
    • 110
    • 120
    • 150
  • 530 SDZ
    • Length
    • 110
    • 120
    • 150
  • 530 SDZZ
    • Length
    • 110
    • 120
    • 150

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