I ride a stock 04 400ex and was thinking this might be a good budget friendly way to get a little more out of it. Has anyone used this pipe or CDI and does this seem like a good deal? I ride mostly in the sand out on the flats and climbing dunes with a little bit of trails here and there. Any info greatly appreciated.

Honda 400EX HMF Exhaust Pipe+CDI+ KN Air Filter 99-04 : eBay Motors (item 380199650011 end time Feb-20-10 08:23:22 PST)

 

That would be a good start with the addition of jetting accordingly for the up in air flow. Also when I had a 400ex dropping a tooth in the front helped alot in the sand. Trying to pull with stock gearing was a little too much for it, especially up hills.

 

Hey thanks for the input I may make some changes soon cuz like you said this bike works like a dog on the hills compared to say my buddies kfx 700 and I cant be sitting there with a blown up bike now can I.

 

Yeah you can't really compare a 700 to a 400 just 2 different animals. Just have to work with what u got, a 400ex isn't the best in the sand, don't get me wrong I loved my 400ex, it just wasn't my style of riding.