cost for the 06

[honda 400ex 69]

how much do you thing it would cost to get the 04/05 up to par with the 06 just talking engine here like the higher cp and the carb and wont the high cp not be as reliable

[duke416ex]

Piston $100 carb $500 new, don't know used. That is just part of it though, the different bore and stroke of the 06 will make a difference and the different tranny ratios will also make the power feel different if there isn't such high ratios.