So I guess maybe I’m having a midlife crisis, earlier this year I bought a 2004 Yamaha R1 but that didn’t give me what I wanted so about a month ago I traded it for 2 400ex’s. 2002 (named it red) and 2003 (named it yellow), I’m sure you can figure out where the names came from. I figure this way my wife and I can both go out and play together in the dirt.
Yellow
wiseco 11.1:1 stock bore piston
K&N filter, no box
Renthal handlebars
Niche carrier and bearings

Red
Namura 10.5:1 stock bore piston
K&N filter, open box
white brothers e series muffler
mad hatter graphics kit
nerf bars
not stock rear wheels

So my reason for posting is mostly to tell anyone reading this, Thanks for an awesome forum! I’ve already done a lot of work on both of these and much of it was easy because of what I’ve read on here. On to what I’ve done so far

Yellow – replaced timing chain, replaced rear carrier, rebuilt rear brake caliper, new drive chain and sprockets, lots of little things not worth mentioning, in process of having the plastics wrapped in dark blue

Red – replaced head gasket, replaced my son’s vocabulary with a few 4 letter words, in process of replacing head studs with gt thunder…

And if there’s any advice I can pass on from what I’ve done so far, it’s to make sure your valves are properly adjusted. And there’s my ATV experience in a nutshell. :ph34r: