Port and Polish

1 reply to this topic
  • Bob_Collier

Posted November 13, 2001 - 04:23 AM


I have 1999 yz400. Thinking about port and polish job. I know some of you have had this done. I am concerned how much carb problems people had after job was done. Any adice.

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  • yzf

Posted November 13, 2001 - 08:33 AM


i had a 1999 yz 400 with a 426 big bore kit and ported and polished head all i had to do is go up two sizes and the main and one size on the pilot and down one clip position on the needle ,bike ran great no bog ether MUCH more bottom end a little more on top too

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