Stroke up crankshaft with high-rigidity H-cross sectional conrod developed to maximize engine performance with ULTRA-SE and DOHC 124cc
Increased rigidity and endurance allow you to draw more power.
Super fast precision bearings (#6205) with built-in timing gear.
It cannot be used with regular or Kitaka old oil pump spindles.
Always use current oil pump spindle set (331-1083003).
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