Just to clarify on the oil filters as some of the info above is only partially correct. The Nytro, Phazer, and Vectors take a 5DM-13440-00-00 style Yamaha oil filter which is definitely a different diameter and length than the Apex/RX-1 style. The 03-05 RX-1 models originally took a 5GH-13440-00-00 filter and when the Apex was released the filter changed to a 5GH-13440-20-00. The -20 designation used on the Apex is 5mm shorter in length than the original 5GH style filter used on the RX-1s. The models that use the 5GH filters can use either style 5GH (-00 or -20) as long as clearance (length) is not an issue. On the Apex/RX-1 models when using a filter wrench and rachet to remove the filter we find the 5GH-20s provide better clearance for easier removal of the filter as the rachet doesn't end up getting backed into the frame area in front of the filter.