Very priceworthy carb från TrailBikes. It comes in two options of jetting.
Alt. 1 Fits 72cc-88cc with 20/23 valves head (Chinese 70cc or Honda 70cc head) with standard cam
Alt 2 Fits 20/23 heads with aggressive cam and, ported heads and/or 22/25 heads or higher (TB, Takegawa, MW, Kitaco etc.) with race cam. Works good on 72cc-88cc.