Oil Fill Extension Tube for Mini Skid Steer / Mini Excavator w/Chinese Rato 420 or Predator 420 420cc Engine, Generators, GoCarts, etc, M20x2.5 Threads

Tired of pouring oil all over the inside of the equipment. Some of these mini excavators and mini skid steers have the engine buried pretty good in the machine's frame, making it hard to reach the fill plug & port. Pictured being used on SDA-140W mini skid steer. Printed with translucent PETG as to see the oil going in. Thread size is M20 x 2.5 and have only confirmed it works on a Rato 420cc motor. I've read, but cannot confirm, that this should be the same thread size as used on the oil fill plug for Honda single cylinder models GX240, GX270, GX340, GX390, and V-twin models GX630, GX660, and GX690. Should fit other Harbor Freight Predator motors used in go-carts, generators, etc. Do not over tighten the threads!