I have been repairing this atv. I must admit I don’t know much about atvs. Part of the repairs was to clean the carb. It ran great for a while. I have come across an issue I don’t know what is wrong. When it’s idling the engine either surges or idles fine. When in gear the engine surges. It doesn’t move forward and it often quits. However, when put in reverse, the atv moves and engine sounds and runs great…in reverse. Can anyone help? Not sure what is wrong. I’m wondering if it has to do with the reverse override.