150cc excessive oil being blown into airbox. By dyoung1167 (Read 288 times)

[dyoung1167]

found after scoot dying from somehow having water in gas, i pulled box from under seat to manually put suction on vac-petcock and oil seemed to be everywhere yet not from engine itself as plastic shroud would have kept it all within said plastic or i should say keep it from going over and beyond. I haven't yet opened air filter as i know breather tube from valve cover goes to it and should have the foam and cover over that little port but sure seems to be a good bit more than a little bubble of oil every once in a while and acting as its own catch can which is pretty much exactly its purpose

[dyoung1167]

i will say that it is a what ya call it ca head for emissions that has been properly blanked at the cylinder block and a non emissions head and valve cover. this was changed just a few weeks ago do to a broken exhaust manifold bolt. I have done this before on an older scoot without causing this. It seems to run fine with descent takeoff and power so i don't think i'm loosing any compression. could it be maybe a badly done valve adjustment? Maybe one tooth off in one direction or another with the timing chain? Like said, i've done this type of thing before without issue but want a more precise place to start before i start tearing crap apart. I don't remember trying so damn hard to get piston at true tdc and the valve sprocket exactly center the first time as i did with this one so is there maybe a slight offset i may have missed?

[kz1000st]

If you were off by one tooth the scooter would run like crap. While it's out there maybe the oil ring is stuck and letting crankcase pressure build. The easiest test would be to pull the breather house out of the air box and see if it's blowing oil when it runs.

[gy6s]

Jul 6, 2022 14:31:23 GMT -6 kz1000st said:

If you were off by one tooth the scooter would run like crap. While it's out there maybe the oil ring is stuck and letting crankcase pressure build. The easiest test would be to pull the breather house out of the air box and see if it's blowing oil when it runs.

[gy6s]

I have a 2008 taotao 50 and it don’t want to run it did start 3 time and then die and don’t want to start I have good gas on it I cleaned the car changed the spark plug and the coil I don’t know what’s the problem it do have spark,gas,and everything it should need to be running can someone tell me what’s the problem

[kz1000st]

Change the spark plug, honest. Then try spraying starter fluid in the carb and see if it starts running. If it dies after that check gas flow again, run a thin wire through the jets and check that the kill switch isn't in the kill position.