I bought a PW50 for our oldest grandson like 10 years ago, and at this point 5 of our 7 grandchildren have learned to ride on that bike. I have had to do next to no maintenance on that thing, and it's as bulletproof reliable as the old 1960's Yamaha DT's. I can go out in the garage and in three kicks have it fired up. We have two more grandkids to ride it yet, and then we'll eventually let it go.
With all of that being said, three weeks ago I was approached by a neighbor about his sons 2015 TTR50, asked if I would look at it, doesn't like to start or run.
Initially just figured I would be doing a carb and jet cleaning and then wheeling it back over to his house, all-done......... not so! I began going through all the usual checks, Air, Fuel, Spark, etc., with no results. Did a carb cleaning, and still no fire. Finally went online, only to find the TTR50's tend to be notorious for becoming hard starters. Electric start with no kicker only adds to the frustation. I upgraded to recommended pilot and main jet's and really dug deep into the starting fuel circuit in the carb. I can get the bike to start and run, but only if I choke the carb throat with my thumb. Now I'm at the point of compression checks and likely top end job. And I don't have time of this.
I've also got a 2018 KX65 that I bought used from our Honda dealer down the street, that was and is still, like brand new that I will be likely selling at some point soon, as none of my grandkids want to ride it.
As a family we're gradually moving past our grandkid mini-cycle stage. And none of them want or enjoy riding as much as grandpa does.
( SATURDAY Dec 7th update: Tested the TTR50 this afternoon, it has a compression test result of a whopping 65 psi. Afterward I tested my PW50 just for giggles and it was easily pinging 120psi, which is actually low for that bike I believe.)