New to site, sort of new to the Arctic cats in general being in Florida they aren't as common as the other big names. Anyways on to my current situation, I recently purchased a used trv400 with 120 hrs 800 or so miles I found on Facebook market place. Went looked at the bike rode it for quite a while maybe 15 minutes looked it over up and down and back again couldn't find anything wrong with it except minor cosmetic things that happen with used bikes. No leaks but as I was looking at the engine I noticed gasket material around the case and head and stuff so I inquired and the owner said that the case was leaking so he had it re sealed when he had the clutch and belt replaced. Buy the bike get it home ride around the neighborhood put a few miles on it up and down the roads. Weekend comes I take it out for a ride, no complaints so far bike is running perfect goes into gear great clutch and belt feel on point loving the bike at this point, as we ride on I start to go through a bit more get to a ditchline inch into nothing crazy (I don't ride hard). I'm only in 2wd with 26 inch tires start to spin the the mud so before putting it into 4wd I hammer the throttle and BAM! Something breaks and I loose power to the rear. So I think to myself ok most likely u joint. Throw in 4wd sure **** it pulls itself out. Ride it back to the house about 3 miles in front wheel drive at this point. Look up under the bike and no snapped u joints no broken CV's so my first thought is bevel gear, only thing I've read goes wrong with some of this things. So I pull the drive shaft and out falls the coupler with the outputshaft snapped off in it. My mechanic says it's the first time he's ever seem anything like it. We are all curious as to why this happened. I can't get ahold of the previous owner to find out who he had work on it so it's all a mystery I'll post pics of everything if I can figure out how. I pulled the motor and it's in the hands of my mechanic right now so I should get word this week if anything else let loose inside or possibly why this happened. Sorry for the long story but just wanted to show I'm gonna most likely be here for the long haul now that I'm fully involved in this project. My main reason for posting is just to see if anyone has come across this or any like this. Also anything I should do or change while I have to bike apart.