13 year old building a mini buggy

My 2008 can-am Outlander 800r is having hard shifting issues. Does anyone have a fix for this ?

Hi everyone,
Outlander 2006 400 XT i have replace the startor cover and right after i did that the oil light is on and not turn off, i check the wires and checked the oil level, everything seem to be normal quad is starting without any problem and rev just fine. i did not want to ride it since im not sure if it is faulty sensor or not so just be safe i did not let it run more the a minute or so. 
I have read in the owner manual that i need to clean the oil strainer every 200hr unfortunately i never did that, my service manual that i have does not even indicate of such a thing. so i did some search around and it seem like canam split the manual into 3 parts
owner manual
service manual
engine manual
I have the first 2 but i can not find the last one, part number 219100232. If someone can guide me where do i find the oil strainer so i can clean it i will appreciate it.   im going to do an oil pressure test tomorrow to check how many PSI i have, just to make sure.
Thanks

I am in the process of puting it back together after replacing the DPS gearbox.
The manual I have states that it will need to be flashed by a dealer. Is this still true?
Also , I have a mystery bolt That I cannot remember where it goes. M6x 70 or so.  Hex head with a flat washer.I will try to attach a pic.
Pic is no go for now....Cox issue I will try again later
TIA

I've been trying to piece this Lakota 300 back together, slowly. It's been a rabbit hole however. I replace one thing, then it leads to replacing other things. Anyway, When I got this thing I noticed that the hose coming off the camshaft cover wasn't attached to anything, it was just hanging loose. (It's literally just a foot long hose attached to nothing) I figured since it was venting the head it would be ok and I am sure it is.
However, last night I was looking at the service manual and noticed that it mentioned that this atv has a crankcase breather tube as well. Mine does not have one, so I looked at Partzilla and looked at the parts diagram and sure enough, it's definitely supposed to have one. The problem however is, the service manual does not show how it hooks up and the parts diagram only shows the exploded view of the assembly. I just find that kind of strange, nowhere in the manual does it show how it connects. Does it have it connector, attach to a nipple? It just doesn't say and it bothers me that there is a hole there without anything attached to it.  If anyone has a Bayou 300 or Lakota 300 with an intact breather vent system and could possibly take some clear photos of it or know how it connects I would be very grateful. I have searched high and low and cannot find any information on it.
 
Thanks

Hey,
I am new to quads and I'd like to know more and be able to repair my BRUIN as much as I can.
I bought a cheap YAMAHA because I know there is parts on the market and they can be repaired. 
I hope I will learn a lot of things in this journey.