I recently ordered a pair of Coleman bt200x mini bikes.
Yesterday I received and assembled them.
After a few hiccups both are running great now, they topped out at 18mph respectively till I dealt with the throttle limiting screw. Now mine settles in at a top speed of 21mph and his settles in at a top speed of 23mph
they were both made on the same day too.
I'm not going to bother doing any more though, the free speedometer app I used is not that accurate I'm sure.
Mine needed a front axle nut that it didn't come with as well as a carb bowl plug screw.
The other which I bought for my dad wasn't running, then I learned about a device in the gas tank which the manuals don't mention.
Long story short I figured gas was sloshing so it should start, but it needed more gas
Today the rear racks I ordered for them arrived so I mounted mine and a cheap $10 Walmart toolbox I had laying around.
Tomorrow I'll mount the rack on the other.