I need a place to ride

Good morning, I am new to the forum. I'm 75 years old and love getting ATVs back to usable condition. I particularly like the 2006-2009 Arctic Cat 250 Utility. I currently own 6. The 2006 I am working on only has reverse and low gear. The "drive shaft" in the transmission is completely stripped where the high gear would mesh. Has anyone on here replaced the shaft. I'm told I have to split the case. I was hoping that someone on here could let me know how hard it will be. I already have it stripped down to where the shaft coming in from the clutch side is the only thing left. I was hoping I could just remove the driven clutch and drive it out from there. Directions say different. Any help would be greatly appreciated.

Anyone here from BC? Where do you ride? 

I just bought a 1984 Suzuki LT185 ATV and am looking for the OWNER’S manual. ( not a service manual) 
I contacted Suzuki Canada but they have no paper or digital copies in their archives. 
Does anyone possibly have a digital copy they’d be willing to share? 

Which is more reliable? Shaft or chain drive? 

I am trying to diagnose a no spark issue with my 02 Big Bear 400 and I am really hoping it is not a CDI.  I have done the test on the stator and I believe that is faulty.  I ordered a new aftermarket one from a the jungle website and it tested bad right out of the box so I am waiting for a different one to arrive from an ATV parts supplier.  I started looking out of curiosity at CDI units and it seems if it is for a big bear you are SOL.  Kodiaks, no problem.  Big Bear. No such luck.