I have a 2005 polaris phoenix and sometimes I have to rock the ATV to get it to go into gear. I can pull the lever easily but it does not feel like it is clicking all the way into gear. I have to rev the gas some or rock the atv to engage the gear. Once in gear it is fine, no slipping, so I think its the actual shifting mechanism that is off. What's going on. Can I adjust the shifter lever? Anyone??