mud in the engine

[jal123ddd]

right ok mud in the engine problem ,my boys bike was going good this weekend until he stopped for a breather well i got it home and checked all the parts like stator ,ignition coil ,cdi,plug and still no go all the bits i have checked have removed and placed with new so i now they work so drained the engine of oil and the looked like there seems to be mud in the engine with the oil and is looking and feeling very runny the oil is like a browny like chocolate how can this be and how can it get in there so can this be the problem any help

[Mountain RFZ]

engine oil goes brown/black after a while

Check have you got spark?

[jal123ddd]

yer got spark did not have a new one but took the one out of my bike ,when i looked at the oil on the dip stick it looked like there was water in it i could see it seperate from the oil a little when i put it on the work bench

[Mountain RFZ]

ok so you have spark, now have you got compression on the kick start?

[jal123ddd]

um yer got compression every thing looking good on it just want kick over

[Mountain RFZ]

Take spark plug out and squirt some petrol down the hole quickly put the spark plug back in ad kick it like a champ!!

[Cagiva4ever]

just in case, have to ask, this exact ENGINE hasnt been NEW to you bought as NEW and is still with Factory oil ? now you have flushed it but was the brown watery oil the factory "shipping" oil, so to speak.

as it isnt specifyed in either topic of yours...