I was going to order the service manual for a 2007 Ninja 500r. The manual is part number now ending in -61 covering 94-09 models. But I can get the -60 covering through '08 for about $20 less. Does anyone know if when they supercede the manuals if there is really any revised or improved info for previous model years covered? Or should I get the "older" manual for less cost?