Bigger main jet, slip on and taking your airbox lid off is a great upgrade for you 400ex. They are great quads, all u gotta is change oil every so often and clean air filter. Not high high maintance but not the easiest.
IDC what ppl say, but throw a full exhaust on a blaster with out a lid, vs. a 400ex with same mods and the 400 will win. the z400 is liquid cooled? that doesnt really make it better? with a radiator u stand a better chance of overheating then u do a air cooled motor? And its 05+ that they have reverse..
Overall its a good quad with power where u need it, and u will be happy if u can find a 400ex that runs good for a good price.
IDC what ppl say, but throw a full exhaust on a blaster with out a lid, vs. a 400ex with same mods and the 400 will win. the z400 is liquid cooled? that doesnt really make it better? with a radiator u stand a better chance of overheating then u do a air cooled motor? And its 05+ that they have reverse..
Overall its a good quad with power where u need it, and u will be happy if u can find a 400ex that runs good for a good price.