Sixth: Find two stroke lines. They're out there. The tracks remember you and want you back. So go out to the loose dirt and start making the track shorter by going across those four-stroke berms.Here's where I've tested the bike in the first two weeks. Let's check these suckers off. Here goes: Glen Helen Raceway's MTA Two Stroke World Championship (www.glenhelen.com), check! Milestone MX Park's Main track (www.milestonemx.com), check! Saturday REM Motocross at Glen Helen's REM track, check! Pala Raceway's main track (www.palaraceway.com), check! Flat rear tire, check!I've enjoyed as diverse a selection of tracks, events and riding hooligans/friends I could hope for in evaluating this new Yamaha. And what my exceptional test riding formula has found out is the 2010 Yamaha YZ125 is identical to the 2009 Yamaha YZ125 except for two stickers, one on each side of the radiator shroud. I've also run into a lot of new friends that want to borrow the bike.In conclusion, the 2010 YZ125 is a bike that can hang with any bike in any class at any track. I have friends that drive all the way from Montana to the World Vet Championships at Glen Helen with nothing but a 125 and they do just fine. They won't likely holeshot a race against bigger bores, cams and valves--although that happens, too--but they'll be chugging along nicely in the end so don't sweat it. For sure these salty dogs of the small-bore clan are better at passing. For sure they're better at carrying momentum. For sure they're having more fun.That's really it. The Yamaha YZ125 is ridiculously fun. And unless you're so far under or over the hill to appreciate the clutch-and-scream mentality that makes riding these minute-motored machines a sheer joy, there's no reason not to choose a YZinger as a full-time motocross mount.Of course, if you're hitting close to 2-hundo on the scale you're probably not in the ideal demographic for this bike. But if you're anywhere between 120-190 pounds, get on and ride. Heavier and you'll really want some spring rate upgrades and a bigger rear sprocket to assist your get-up and go. Or, you could get on the program and drop a few pounds. Yes, the Yamaha YZ125 might be the weight-loss revolution of the century, too.So, if you're wondering why you'd even consider buying a 125, use the people bugging me to borrow ours as an example. Here's what I ask them. Why are you bugging me now when you sold your 125 for a 450 long ago? Could it be the desire to feel like a kid again? Could it be the leftover two-stroke oil collecting dust in your garage? Could it be the fact that the YZ125 is totally awesome?Yes to all of the above. But mostly because the Yamaha YZ125 is awesome.More in print: Soon you'll be reading more about the YZ125 in the pages of Dirt Rider Magazine. Like, oh…which exhaust system is best from our exhaust buyers guide. Stay tuned.