I'm going to need to freshen the top end on my son's 400ex. I've done a number of top ends on my 2 stroke bikes, but I've never rebuilt the top end on a 4 stroke. Its using some oil, so I'd like to replace the piston, rings, needle bearing etc. My question, is there any instruction manuals I on the web I can download, or can someone please e-mail some to me. I'd like to educate myself before I take on this project.

Thanks.

 

a clymer manual is only $20 and its pretty detailed

 

I just needed the same thing and I found this website where you can download the service amnual for free, you just need fast internet cause it takes a while to download...good luck

http://manuals.dqt.be/index.ph...id=36&func=select&id=6

 

bandit400ex great site, thanks for the link.

 

you think the site is great, wait till you see how much info is the manual...glad to help

 

It should be easy to do an in frame rebuild. Although I've never done one on a 400ex. I just completed a top end rebuild of my 200sx. A 1mm over piston, stage II web cam, rebuilt head, new clutch. After I had all the pieces it took me a day to complete and get it running. That includes putting it together and taking it apart at least 3-4 times. The trickiest thing for me was getting the cam timed right. I still don't think I have it right. And will be bringing it in this spring to have someone who knows what there doing take a look at it. But it runs good. And I even think its faster than my 250x! Good luck.