Hi My huskvarna wr 250 two stroke has no spark to

can you tell me what year and make of atv sounds like you might have a timing problem were you do have spark but at the wrong time need more information to know for sure and also is it 2 stroke or 4 stroke

disconnect any and all kill wires going to the coil... if you still have no spark then it can ONLY be the coil... if this produces spark then you have a kill system problem or your flywheel has no magnetism... and this can be the only solution as you do not have points/condenser or things just went full derp

anon re connect the kill switch. If this fail try connecting the two ends of the wire to the kill switch together.

Try this ... run a hotter plug one or two ranges higher than called for by the manufacturer. Best place to get advice on this is from the friendly guy or gal at your Yamaha Parts counter. You are using the proper mix, correct?????

"8K" but i would go with a 8EK" its the same plug temp, but it is a double prong plug...better spark

Hi,
You need to change spark plug with original one. Please get it on your owner manual

ur carb needs tuned and get a colder spark plug

Take out your spark plug, but plug it into the plug-wire. Let the bottom of it dangle against the head and try to kick it. If no spark, problem with that, if it sparks, you may have a cracked head or piston/rings problems. This will at least rule one thing out.

if the stator is producing suffient voltage then it's not being amplified by the coil possibe causes are poor grounding of the coil, poor primary electrical connection to the coil from the stator a compromized kill swith wires or possible some water in the switch it self keep in mind it takes two conductors to make a spark are you grounding the plug to bear metal when you are kicking it over ?
and have you tried a different spark plug doesent take much spark it can be pretty difficult to to visualy deterimine if you have suffient spark try putting a tea spoon of gas down the cylinder put the plug back in -cap on a kick it a few times if it fires you might be on the wrong track
Good Luck