Maintenance & Technical > KX500 Original

1985 KX500 fuel coming out of intake!!

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sevenbridgesangler:
Well I got my carb back yesterday. He told me that it looks like whoever owned it before me took pliers to the needle jet :-o He did replace it for me. (even though it's a new needle could it still need adjustment? I imagine when they put it in they probably adjusted it not sure though.) I put it back on the bike and started it. It ran better but it still leaked fuel out of the intake!! The head gasket should be in today so hopefully thats the last piece to this nightmare puzzle.

Friar-Tuck:
Diesel Guy Meet Two stroke engine guy :-)
http://www.kxriders.com/coppermine/displayimage.php?album=search&cat=0&pos=0

  The first few pages give you a great primer on what does what in the world of two-stroke  :-D
     Tuck\o/

sevenbridgesangler:
Well I replaced my head gasket and it still runs like s**t didnt check if fuel was coming out of the intake but was still smoking pretty heavily and not running right. any ideas?

Goat:
Still could be multiple things causing it to run like crap. Best to start with the cheapest and easiest things first as I'm sure you know from working on diesels. Carb adjustment and jets would be the first thing.

Link for carb tuning and jetting chart - http://www.kxriders.com/forums/index.php?cat=9

If the reeds have seen better days... When you pull the reed cage out there should be no gap between the reed petals and the cage. If there is any gap you can try flipping the reeds over but usually that doesn't help. I do know you can get a set of Boyesen reeds off ebay for around $40 shipped.

Hows the air filter? New, slightly old or 25 years old? lol 

Might want to pull the flywheel and check the keyway and key to make sure it's not throwing timing off. Check the stator coil and make sure its not rusty as that will make it run like crap and eventually not run at all. If there is any rust you can use some fine grit sandpaper to clean it up. Also if there is any sludge in there the crank seals may be bad. Which would cause it to not have the vacuum it needs to pull the fuel up to the top of the piston to burn.

I'll keep thinking but I hope this helps.

sevenbridgesangler:
Alright thanks for the help I'll start checking stuff this week. I'm way to lazy to go out and do anything right now :-D

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