too rich fuel

[afunk]

I bought a 2004 yz 250 and bike runs rich "foul plugs fast", runnning mixture at 32to1..help if any suugestions plz !!!!!!!!!

 

[agitt73]

jetting must be wrong im not sure what the jetting is on those bikes
also check gear oil if its getting low with no leaks it could be a crank
seal

 

[afunk]

dont think it is that...what is a good ratio for gas to run?

 

[Zerotact]

use what ever it says in the manual 32:1 is common.. I'd say you should look into jetting

 

[JohnScott]

Do a search on jetting - the premix ratio is not your problem. A recent thread adressed jetting issues with this bike - or a 2003 - which shouldn't be far off. Filter what you read though, one of the threads was full of crap.

John