Looking good, apart from what appears to be texture tearing around the left intake. Also, perhaps you need a higher resolution decal of the motorists Ying-Yang you got there?
Unfortunately that is the highest res ying-yang Balance Motosport logo. It looks fine at full size it's just when you shrink it down it goes all blocky.
Re: logo - What did you shrink it down with? It's usually when you enlarge something that it should get blocky.
Re: tearing - maybe not the proper term for that, but I mean the way the yellow sort of bleeds/doesn't match at the left intake (unless it's intentionally like that).
Yeah, try to use something that actually resamples the image instead of just resizing it, that way it won't be all blocky. If you have option over what sort of resampling to use opt for "bicubic".
OK nice one - I'll see if there are any options I've missed but the only other image size change that I have seen so far is by reducign the number of pixels. Not gonna help much.