Cr 85 wont spark

sidestand lockout switch is sticking...bike thinks that you're trying to ride away with the stand down so it kills the sparks.

Could be a bad cdi box. Ive this problem with my xlt when I go for a ride, stop to eat and head back out to go home it won't start. I've usually had to choke it, and pull until it starts. My issue is carb settings. If you don't have spark I'd try replacing your cdi. If you know someone with the same sled try there's.

check the diaphram in the top of the carburetor.
they may have overlooked a small hole in it.

if that's not the case then i would certainly take a look at the carb myself.

the carb may have been cleaned out but still got a little more trash in it from the tank once it was reinstalled.

also drain the tank see if there is water or trash in it.

also check the airbox and the airbox intake boot for water or trash.

it's possible that you have a worn valve stem seal, but normally those only worsen as you ride them more, and you would notice smoke from the exhaust due to oil burning.

also check the intake boot for cracks. ( the one in front of the carburetor
and you could change the spark plug it wont hurt hope this helps John

try a new spark plug. if u fowl out a plug some time they will not fire under compression.2 strokes need. fuel,fire and air, very simple engines.it is possible crank seal are bad .that doesn't allow the engine to create vacuum in the crank case.thus fuel and air will not make it to combustion chamber.

Don't use cold start.it will not solve your problem.Try running it with out the air cleaners ,it may be that you have an air intake problem and not getting the right Air / fuel mixture .

has the bike sat up for any amount of time?? if so first clean you carb, replace spark plug. when was the last time you had the valves adj.? remove the airbox and spary alittle carb cleaner, starter fuild , wd-40 in the carb with the thorttle wide open, then close the throttle and see what happens if wants to start clean your carb.
good luck ride safe
Mark
C.C. Motorsports

you are going to have to open up the carbs and look at your jets screws. take a thin wire poke it through and blow it out.. replace and enjoy the like new feeling ride.

for any motorcycle to run you need three things. spark, fuel and compression. i see you've tried to get fuel and spark. if you have spark thats one down. dont pour fuel into cylinder. instead spray tiny bit of brakeclean or carb clean into spark plug hole. i have a feeling if you drained your gas after the carb clean the carb most likely sucked bad gas back up and might need cleaned again. ive seen it happen alot on ols bikes.

You will have to perform some basic checks like tht of sparks reaching the spark plugs and tht the fuel too enters the combustion chamber, wth your explanation it seems fuel is not entering correctly into the combustion chamber... you will have to clean the carb/s.