05 rmz 450 & 07 rmz 450 differences?

Hey guys, so my weapon of choice for 2014 is an 05 rmz 450 & since I'm getting pretty serious in motocross I picked up a practice bike (07 rmz 450) any known major diffrences between the two? Here's my bikes. I know the shrouds & rear number plates are different. 05 plastic matches up perfectly. Already have a matching kit for it thanks to my great sponsors (: any info would be appreciated !ImageUploadedByThumper Talk1392602647.842482.jpgImageUploadedByThumper Talk1392602665.425130.jpg

07 has an auto cam chain tensioner but the 05 is manual, lower engine mounts 1" further in so engine slightly narrower. 07 has slightly higher top gear ratio I think.

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