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I've had no problems at all with stock crank on my past 08 KFX450R with 13.8 piston or TRX450R........
USA
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Sold 2008 Kawi KFX450R // Rage built // Motoworks G2 // 13.8 Piston // Custom Race Cams // PIM2 // Port/Polish // FCI // Bored throttle body
SOLD 2008 Kawi KFX450R- Engine work by Rage
SOLD 2007 TRX450R- Engine work by ATP
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