As soon as I received it, I changed the jet (smaller size),slapped it on, took it for a test run.
Improved mid torque and top speed. Good inexpensive upgrade. No gas or air leaks.

Works great out the box, but runs too rich and bike won't idle. I also purchased XLJOY 5mm replacement jets kit so I could swap to a smaller jet. I'm in Cali. Jetting depends a lot on climate and altitude, so tuning this carb is mandatory especially if you plan to use a boost bottle and expansion chamber exhaust.

It broke on my first long ride. I get a spark on my motorized bike, it's not an Electrical problem. Gas flows into the Carburetor, so not a fuel problem. Checked clutch and there is no slack. I have added high temperature adhesive to my motor, so no leaks and no loss in compression. So it narrows it self down to a worthless carburator. Didn't even last 30 minutes. I would like to return it, but cannot find the folks who are responsible. I am more sad than angry. This was my ride to school. Now I am back to pedaling my way to class drenched in sweat because my stock carb also failed.........however, the learning experience has been great, I cannot doubt that. I don't know why it failed. It looks great and fancy. I did get a boost in acceleration but lost about 3-5 MPH max speed. I guess some are good and some are bad, I am going to keep trying. Wish I gave this 5 stars though......not every little thing is gonna work out the way one would like.....

Update:
So I found out that my CDI had a low resistance of 4.3 ohms and caused my motoBicycle to not run! I had spark at first and assumed electrical was good until I used a voltmeter. As soon as I got a new CDI it started right up and had a blast!!! I go from 1 star to 5 stars!!â­â­â­â­â­!!!!!! It works! I'm sorry if I mislead anyone.....it is my first bike and I am still a padawan!!!!!

The Carb looks nice and works great but you do need to rejet it I used the number 75 jet and it runs like a camp