400ex rocker arm problems?

[Exrider434]

http://cgi.ebay.com/ebaymotors/Trx-400EX-Air-Scoops-Shrouds-Brushed-Aluminum-Honda-400_W0QQitemZ110223499565QQihZ001QQcategoryZ43971Q QssPageNameZWDVWQQrdZ1QQcmdZViewItem


"These will help improve cooling by diverting air towards the cooling fins of the motor and maintain a more consistent engine temperature. 400ex's can develop rocker arm problems because of inadequate cooling."

Is that a true problem? I have never heard of that happening unless you are running aftermarket cams

[XXXRACER165]

I read in a dirt bike mag one time about all of the dirt bikes and their problems. And on the XR400 page they said the 400 engine had a long term problem if they get hot, the engine would stick a valve or two. I've never heard of rocker probs but hey, anything can happen.