gears? i have a 2004 yamaha and when i turn the ignition on when the bike hasnt been running it makes an air compressor like noise for about 4 sec then stops and doesnt do it at all after its been running and warmed up, also sometimes when i go to shift gears sometimes it seems to not want to go in to gear and i almost have to force it, what could these things be................................please dont answer like first of you need a harley etc.