Crap Out in High RPMs of 4th & 5th

[moore020]

Rebuilt 01 400ex to a 416. While doing break in, I got to the full throttle series and the quad started to crap out in high rpms of 4th and 5th gear, but not in lower gears. Any ideas? - Josh

[bigbad400]

sounds too me like its a little rich on the main jet. read the sticky under the 400ex page.

[honda400ex2003]

x2 steve