Thought I share my experience. First Big Red 250es. Bought non-running. Had been sitting at a cabin. Not sure how many owners. All original parts except the carburetor. Not perfect, typical broken plastic, broken front rack, small dents in gas tank. The guy I bought it from thought it just needed good gas. So my journey began. I started with the gas and gas tank. Lots of rust and sediment. Dumped the old gas, rinsed with vinegar twice, and ended up replacing the petcock filters. It already had a carb made in china on it so I tried to rebuild it. After not much luck I bought another carb, made in china, for $ 30 bucks (still looking for an OEM Carb). I went back and forth installing and removing, checking everything, adjusting, reading the forum, etc. It would run strong for 15 - 30 seconds and then quit. I should mention I have little experience with rebuilding or adjusting carburetors so I was ready to give up. Long story made shorter I had remembered reading a reply to a post on this forum that mentioned the carburetor float level was important. That tip, in addition to reading and following the Honda service manual, for checking and adjusting the carburetor, allowed me to bring it back to life! Success is so sweet. I believe the float level was wrong on both the old carb and the new one. The old one was sitting to low. The new one was sitting to high. I adjusted it by bending the tab the needle valve hangs on. Service manual stated it should sit about .75 inches high. I then followed the service manual for adjusting throttle and idle. I almost overlooked the air filter and plug. It now runs great. Really strong motor. Just starting to have fun now. Another Big Red 250es on the trails again! Well now I'm ready to look at the brakes that do not work, the one taillight, how to break lose the front axle, etc. Thanks Three Wheeler World!