yz400f to 426 upgrade?????


No replies to this topic
  • yamaha mark

Posted July 28, 2010 - 02:19 AM

#1

hello to all,and i know this post might be found elsewhere on this site but at the moment im over searching on this topic.i need facts who has done this upgrade and what did it involve.from what i can see if i buy new piston, rings cylinder and connecting rod it should work and while im there im throwing in a auto decomp cam evrything im reading on this is just becoming a blur, so any help (facts) would be great.:smirk:





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