Pretty much everyone recommends splitting the case to replace the camshaft - there are advantages to doing this as you can check and make sure that all of the bottom end is in good shape,
If you review the "Polaris Bottom End" video that I attached - it shows how to set timing gears during reassembly (starts around the 40 minute mark)
- I would suggest you watch the whole video along with the "Top End Build Up" one done by the same guy - there are many helpful tips in them.
Are you still trying to replace camshaft without removing engine & splitting the case?
Here's a link to an old thread on the question, that has c2turbo "David" with "Complete Performance" in Marietta GA saying it can be done.
- looks like his last post on the forum, was in May 2013, but it appears that they have a active Facebook page
(see his comment below)
Can the cam be swapped out without removing the engine?
www.rzrforums.net
(YOU CAN change the cam with out splitting the cases did one last week. you do have to pull the motor and side cover. you don't have to pull the head off but take the rockers out and push rods. we use 4 magnets to hold up the lifters pull the side covers and magneto and 2 gears slide the old cam out molly up the new one slide it in and reassemble.NOW with this being said ! Polaris recommends that the lifters be replaced, this can be done without splitting the cases but not without removing the head.the whole deal can be done in about 2 hours once the motor is out which is about another 45-1hour if you are fast and everything goes well
Thanks David
complete Performance
770 519 7525
Good Luck