Yz 400f timing settings - Yamaha Motorcycles

SOURCE: What size is the fuel

The size is 5/16.

SOURCE: how to start yamaha yz

pull the choke out, make sure fuel is on, DO NOT turn the throttle before starting. now you have to make sure the cylinder is at the top of the stroke, give the bike a couple short, easy kicks your not trying to kick it over yet, you are just trying to get the piston to the top of the cylinder, as your givivng it the short easy kicks, you will notice that the kick is getting shorter and harded......until you are at the top of the stroke....now it is ready to kick over, hold the hot start lever in about half way to release some compressionand give it a hard strong kick, if it doesnt start on that kick, make sure you are at the top of the cylinder again and when you are, give it another strong hard kick all the way to the bottom, when it starts immediatly release the decompression lever or you could do damage to the valves. relaese the choke, you dont want to leave the choke on too long because it is a very rich gas mixture and will eat the oil off the cylinder walls after a while. and DO NOT high rev the bike until it is warm, because you need to make sure that oil has gotten to the top end. it isnt a 2 stroke, ya cant make her screem right away.