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Storyboy
04-28-2013, 08:14 PM
I have a 85 250es that's not firing.... Any ideas

dustrunner
04-28-2013, 08:22 PM
did you ever have it running ? maybe a corroded connector ?

Storyboy
04-28-2013, 08:25 PM
Never had it runnin, all connections good

hublake
04-28-2013, 09:17 PM
Check the fuse.

Storyboy
05-01-2013, 04:47 PM
Fuse is good, getting ground, stator seems to work fine, will turn over but no fire. Tried a few diffrent coils and nothing

dougspcs
05-01-2013, 08:07 PM
Same as your other..'no fire' thread partner!!

http://www.kb0nly.info/ATC/index.php

Jfm0
05-01-2013, 09:10 PM
Look at the on/off switch on the handlebar. Our 250es will turn over with that switch off, but we won't get any spark. I drove myself crazy trying to figure it out. Fortunately my brother came over and spotted it right away. He got a good laugh out of it...

MonroeMike
05-01-2013, 09:50 PM
http://www.3wheelerworld.com/showthread.php/118578-Bike-wont-start-READ-THIS!-Four-Stroke-General-ATV-Troubleshooting-guide

ps2fixer
05-02-2013, 06:30 AM
If you are using the starter, try to kick it instead. Saw a few posts here lately with no spark or weak spark while using the electric start. Might be a weak/bad CDI box.

Storyboy
05-03-2013, 12:23 AM
How do I test a cdi box?

ps2fixer
05-03-2013, 12:41 AM
According to this post, it is best to test everything else, unless you have a spare CDI laying around or that you can barrow from a friend. Stator and pickup coil should be within a range in Ohms when tested with a multimeter, details are given what the reading should be within the service manual.

http://forums.atvconnection.com/yamaha/314027-how-test-cdi-unit.html

barnett468
05-03-2013, 10:14 AM
Hello


Never had it runnin,

xxxxx

all connections good


How do you know that, it doesn’t have spark?

Did you test for continuity on both sides of the connections?

Xxxxx

Fuse is good,


Same as above.

xxxxx

getting ground,


Same as above

xxxxx

stator seems to work fine


Just EXACTLY how did you possibly determine this?

xxxxx

will turn over but no fire.


I’m guessing you mean there is no spark when plug is laid on the cylinder head and it is kicked over, is this correct?

xxxxx

Tried a few diffrent coils and nothing


Did you OHM test the original coil?

Were these coils designed to work with this type of system.

Are they known to be good or are you just guessing?

Xxxxx

How do I test a cdi box?


Unless you OHM tested the original coil and stator there is no point in testing the CDI.

There may be a test procedure in the manual but it doesn’t help so in other words the way to test it is to install one from a known running bike or buy a new one if possible.