gears grinding

Ok am sure this is a bad thing. My problem lies when am downshifting into first. When i come to a stop ill try to put the bike in first anywhere around 5mph-15mph. Always grinds and doesnt go in smoothly. What am i doing wrong? Also when shifting to second its a hit and miss if i pass through neautral and hit second or it just doesnt hit second and stays in neutral. If i do hit neutral and try to go into second it will have alittle grind to it. 3rd, 4th,5th,and sixth are all smooth as hell, pops into gear with the slightest of ease. Something need adjusting? Bike only has 1600 miles on it

[yorkie_chris]

Chain tension and oil level all effect the gearbox quite a bit, if you're shifting with the clutch then check thats moving freely too.