"WILL" Jet Moto 200cc factory drive sprocket
 

Just an FYI to future buyers:
The Jet Moto 200cc "WILL" bike is shipped from the factory
wit a 17T/56T set up giving a 3.29 final ratio per JT Sprockets
website. :-)

That's good for off-road, but it makes 60mph almost unattainable.

Correct.
I did not totally max it out since it is still in break in,
but by 50ish mph on the side road today on my COOOOOLD
5 min ride and that lil engine was SCREAMING!

MUST install a 46T or maybe even a 42T for highway speeds.

LOTS of power at 50MPH though. Almost instant throttle response. LOL

With that sprocket ratio, it can probably climb a telephone pole. ;)

That is the way alot of them came. I suggest getting a 44-46T sprocket.

That is what I was thinking--42 might be a little too high. 44 maximum-minimum (never thought that would make sense, did you?).

I found that I did not gain much going smaller than 45. I tried a 42T and almost felt like I lost more top end. 44-46 will get you into a 55mph cruise speed.

That's if you're on the leaner side. If you're north of 200lbs, you might need an ever lower ratio, like a 48 tooth.

I am definitely on the leaner side. I am 5' 10" and just last night
before stepping into the shower I weighed myself in my "birthday suit"
on the new digital scales my wife bought and was a porky 163 LBS / 74 Kg. Once I loose this beer belly I have been working on getting rid of I can hopefully be back in my 32-30 pants and will be back at 155ish lbs.
;)
Since having a mostly desk job the past 10 years, my muscle tone has went to he!!
Be nice to get that back again. :)