does any one know where get to a waterproof fan for 07 honda400ex.

 

Your looking for the Spal 4" Puller Fan. Just search google and you will find some. You can also find them on Ebay sometimes.

 

ok thanks ill go look it up

 

do u think a fan or a biger oil cooler would work better

 

Fan, definitely! A bigger oil cooler does help, but a fan will help much more because not only does the fan help cool the oil cooler, it also blows more air across the cylinder head which also helps with cooling.

edit: Unless you do most of your riding at high speeds...? If you ride at high speed 90% of the time, then a bigger oil cooler would probably work better. But if most of your riding is done at low to mid range speeds then go with the fan.