Just ordered a service manual for my used 2019 800XC. Not sure if the previous owner had done the initial valve adjustment or not. Looks like the rear is easy to get to but the front cylinder is buried. Just did a quick look so maybe it's not as bad as it looks.  Any tips or tricks?
Thanks

[2015 Z Force 800 53/Trail EPS]

Dead cold...as in not even started in the last 6 hours...and as the XC doesn't use a wet clutch, use the primary to rotate the engine to find TDC of the compression stroke with BOTH spark plugs out...and be sure to blow with compressed air around the plugs before removing. Don't want any dirt or trash falling into the cylinders.

Finally got around to doing this.  After you take the air box out, it's not too bad. The left "front" one is a PIA.  I must have one that is not quite adjusted right as I've got a slight tick sound so we'll take it down and  double check them all again. 
defiantly sounds and runs better as they all were on the too tight side from the factory.

So mines coming up on its first valve adjustment. Do I need valve cover gaskets/orings or anything of the sort?

[2015 Z Force 800 53/Trail EPS]

So mines coming up on its first valve adjustment. Do I need valve cover gaskets/orings or anything of the sort?

Nope. They are good for a long time as long as they don't get over-tightened.

A bendy mirror is handy for the front exhaust valves.

I just did the break in adjustment on my 2022 800 XC.

It is actually so far, one of the overall easier machines I've worked on in a while.
A bit of patience working the panels off and the airbox and center frame panel and boom.

I will be getting a 1/4 drive torque wrench (for the valve covers) but I was able to make do with my 1/2 drive clicker wrench and adapters in this case.
Everything was fairly accessible, my hands fit and I never came anywhere near throwing tools over some CAD engineer college students good idea.
I just got rid of a truck because you needed a sawzall to do simple crap like drop the transmission on it. Great mileage, fun to drive, but a PIA to wrench.

My 800XC is fun, not bad on gas (vroom vroom wheee) and easy to work on so far.