Morning all , I have 2 2020 500HO's, and  a 2019 600, and I've hit the 20-hr mark on all,   in the manual it says the dealer needs to do a 20hr valve clearance and spark plug check..
My dealer will charge almost 500.0 per unit unit for this service, Anyone Have any experience on the validity of this task (not the plug part)at the dealer or should i u-tube it (maybe someone has done this already with a video?) and i can check adjust myself, I'm mechanical so not afraid. 
Any thoughts? yes they run perfect.
Thnx

[2015 Z Force 800 53/Trail EPS]

It's all basic stuff they all will need at one time or another so..dive in. Unless you want to pay OTA for simple stuff.