Yamaha Moto 4 250 Won't Start - Help Appreciated - Yamaha Jul 20, 2018Bought an old Yamaha (Moto 4 250) and the thing wont start. It will start with choke full on - but close choke and itll die. If you give it gas - it dies. It will take throttle with choke on (and smoke like a chimney). When I first got it the thing would start periodically - but again soon as you..Bought an old Yamaha (Moto 4 250) and the thing won't start. It will start with choke full on - but close choke and it'll die. If you give it gas -..Sounds to me like either there is still some blockage in the fuel passages of the carb making it run lean without the choke on, or possibly the thr..I actually thought it was still a carb being dirty issue myself - which is why I've cleaned it three times. It's definitely clean - and when I clea..Just an update - shaking the bike for a second or two will make it start and run. It'll eventually die if you don't shake it while riding. Would th..That sounds like the float or needle valve in the float bowl is sticking and not letting the fuel into the float bowl. . You might als try disconec..I also have a yama 4 but an 200. had same problem. I replaced the gas valve in the tank. rebuilt the carb reworked the choke and it has been a cham..Did a thorough cleaning of the float needle valve (where it sits) it sometimes sticks in and doesn't fall out. Just a tiny movement will make it fa..The symptoms you describe all point to fuel problems , and a stcking float needle valve is the most likely culprit .My money is on float needle valve or possibly bad needle on slide Sent from my Life One X2 using TapatalkWent in and cleaned the float needle seat as best I could (mirror like now) - noticed notches on the side from the needle valve wearing in. It stil..Service Manual For 1989 Yamaha YFM350ER Moto 4Jul 09, 2014Yamaha moto 4 will not start?.?. Neutral light will notNov 09, 2012See more results Yamaha Moto 4 350 Wiring Diagram - Gooddy - Wiring Forums Nov 30, 2017Yamaha Moto 4 350 Wiring Diagram - Gooddy by wiringforums. This is the Yamaha Moto 4 350 Wiring Diagram – Gooddy of a picture I get via the Yamaha 250 Bear Tracker Wiring Diagram collection. You can save this pics file to your individual laptop. Please right click on the image and save the picture.