to much oil ???

[rubicon500kid]

ok my friend changed the oil in his 400ex and it has fouled 2 spark plugs but ran perfect befor he changed the oil so he checked his oil and it was over the high level would this cause his bike to smoke a tiny pit at start and foul his plug ?

[Chillinthemost]

How much did he put in it? It would have to be WAY to full to foul a plug.

[rubicon500kid]

like i think it was 3 quarts or sum thing like that i know its like a inch over the line where it says top

[UncleRico]

Did you check the fitzer valve? It sounds like the fitzer valve, you can fix it but you're gonna nee the following...

"some pliers, and a set of 30 weight ball bearings (it's all ball bearing nowadays) And I'm gonna' need about 10 quarts of antifreeze, preferably Prestone. No, make that Quaker State."

                                                                             - Fletch

[Fox17]

3 quarts of oil!!!!!!!!!!!!!!!!! thats way too much. my 300ex only takes 1.6 quarts. that would make it smoke i think but dont no bout the spark plug.