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9/6/2017
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Linus_Göransson
9/6/2017 1:22pm
9/6/2017 1:22pm
Hello,
I recently changed piston in my bike. After that it was a bit difficult to start. I took it easy in the begining and all that but then suddently it just stopped. No bad sounds or anything just like someone pressed the killerbutton. Checked the entire motor but everything seems fine. I kick and nothing happens. It got spark and fuel and the valves are in good condition, and the play between the valves are on point. But it's super dead. I think it's something electrical but where do i start looking? I've been working on the bike for 3 weeks im so tired of this, pls help!!!
I recently changed piston in my bike. After that it was a bit difficult to start. I took it easy in the begining and all that but then suddently it just stopped. No bad sounds or anything just like someone pressed the killerbutton. Checked the entire motor but everything seems fine. I kick and nothing happens. It got spark and fuel and the valves are in good condition, and the play between the valves are on point. But it's super dead. I think it's something electrical but where do i start looking? I've been working on the bike for 3 weeks im so tired of this, pls help!!!
Try a new spark plug. Make sure it's gapped correctly.
Does it have compression? (Valves aren't closing, hole in piston, etc...)
Does it start if you take out the spark plug and squirt some gas directly into the cylinder? (Fuel delivery related)
Is the timing correct?
Is the timing chain installed correctly? (so the valves are opening at the correct time)
For some reason I suspect your injector is not adequately/properly supplying fuel. Just a hunch.
The Shop
Had a similar problem with my KX250f 11, changed the coil and everything was good.
When i removed the spark plug and kicked it i had a spark but in the end it was not strong enough.
Search for days at the beginning the engine starts for some time and than it stopped wouldn't start again.
Its worth a try.
You can't squirt gas directly into the cylinder without removing the spark plug. I thought it was common sense that the spark plug would have to be re-installed before trying to start it .
But yeah my guess would be timing first. And if that's correct electrical most likely. Replaced the entire bottom and top end on my YZ450f one time. Got it all back together at midnight that night. Wouldn't start. Sure enough was one tooth off on the timing. Anyway good luck!
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