I have a Acerbis louvered front fender on my '87 XR600 that I need to replace. I don't know if this fender was specific to this bike or not. Was the stock fender louvered? Does anyone make a louverd front fender for these anymore (Acerbis does not list them)? Is a louvered fender necessary for cooling? I'm going to be carrying a front fender tube pack so the fender needs to be sturdy. Any suggestions? I'm impressed with the Maier MX rear fender I just bought --it is stout, maybe to stout (won't flex much). Thanks.