MAGNUM BIG BORE KIT 89MM, 440cc's, RATIO 11:1 INCLUDED ARE ( CYLINDER, PISTON, RINGS, CLIPS, PIN, AND GASKETS)
No core charge or sleeving required, true bolt on and go.
FOR: 1999-2016 HONDA TRX400EX AND 400X
1996-2006 HONDA XR400R