Hello all, I am a new ATV rider just bought a New 2008 model Honda Rancher 420cc ES 4x4. I am having a problem with the radiator getting clogged up after about a hour of trail riding. I do go though some mud but it's nothing that the ATV can't go through in 2 wheel drive and it not more then 1 1/2 feet deep. I see that there is not much stopping the mud from coming from the front tires and slinging it on to the radiator. Has anyone had this problem. Also any info on max speeds in certain gears like 1 to 4 I just don't want to over due it and burn it up. I am from Louisiana and hope to get to know some of you. Also maybe some ideas on tires. again I mostly trail ride but would like to be able to go through some mud and water one day. Thanks and have a great week and be safe.