I bought a used 98 YZ400 a month or so ago for what I thought was a great deal but quickly turning into nightmare.
Original issues here: http://www.thumperta.../#entry10936037
Long story short bought not running well (did run) and needed new carb. I upgraded to 07 450 carb no start. I then found the intake valves needed adjust - reshimmed and bike ran. I never took it out as I was replacing the chain and a few other minor items and now it does not run again. Thinking the timing chain needed replace bought new one. When I removed flywheel I found it looking like this.
The manual says if there is evidence the stator is hitting the flywheel check the run out of the crank - which I am assuming means "your are screwed and you need a new bottom end or entire engine rebuild".
1) I'm certainly not an expert but the stator seems worn down there it is definitely hitting the flywheel and there is metal shavings everywhere. I am assuming it's toast - if you can see from the picks can anyone confirm?
2) If so, can I simply replace the stator, clean up the flywheel, install the timing chain and hope for the best OR do I need to begin the rebuild process?
Any help is much appreciated!
Edited by WrightStuff, August 29, 2013 - 10:14 AM.