In this video upgrading the stock carb on this honda xr150 with a pwk 28mm carburetor. Gave the bike a lot more torque and power!
Update had to change the jetting after riding it. It needed a little bit more fuel.
Carb used
https://www.ebay.com/itm/404650607612...
Intake manifold
https://www.ebay.com/itm/373801170189...
Airfilter
https://www.ebay.com/itm/315046322557...