Picked up a new battery, but this ATV still wouldn't start. Cranked at a decent RPM, had spark, plenty of fuel, but would not fire. what else to do, but to check youtube...?
Found a video about checking the valve lash, awesome! shows wrench sizes and all the important stuff: • How to Adjust valves o...
Not hard to do, took me 1/2 hour and it fixed the whole lack of starting thing I had been fighting. - took longer to upload this video than it did to set the lash! :) -
I didn't check the compression before or after, but putting my thumb over the spark plug hole created suction. I'm guessing the intake was open just enough to keep the fuel from compressing before the plug fires when cold. My cousin had been push starting it due to battery issues. from what the internet says, doing that or pulling it to start will build enough pressure to overcome a valve that's slightly open. starts like a champ now using the electric starter. 1999 Yamaha Badger 80cc ATV back on the trails.
22 авг 2024
