try this link It is for 96-04 Sportsman 335-500 http://fs07n1.sendspace.com/dl...20service%20manual.pdf

 

<div class="FTQUOTE"><begin quote>Originally posted by: HARLEY_OWNER

also.. i was at the shop the other day.. and maybe they were just trying to get me to buy there oil.. but he said on my 99 500 and years around that... alot of them had problems with cams because back when they first came out they used regular motor oil.. and the oil was not getting to the cam.. or the top of the motor.. so they switched it to the syntec.. or whatever it is.. so if yours has always had syntec.. then your prolly ok... but if it did had motor oil or 10 30 or you just dont know... it wouldnt be a bad idea to check it out... im thinking about buying a book this week and seeing what kinda trouble i can get into....



but thats just what i heard.. sounds good tho</end quote></div>

[img]i/expressions/face-icon-small-happy.gif[/img] Our 4-strokes have ALWAYS required synthetic oil even back to the 425 Magnum!! 0-40 until Ps4 plus came out! Probably why some cams could have worn early if dino oil used! Along with infrequent oil changes! OPT