To much crankcase case pressure??? By conora (Read 431 times)

[conora]

Installed new oil pump and now I am burning oil and blowing white smoke out of the head. The vent hole on the head is working but apparently not well enough.I just put a dip stick oil decompresser with a catch can on but it didn't help much. BTW I have a 100cc bbk it was originally 50cc, straight pipe and many other performance upgrades.

[cyborg]

What bike is it?,,,how much oil did you put in it when you did the build?,,,sounds like you may have over filled it,,,they don't take much

[conora]

Tank urban 50 I though the same thing so I drained about half of it and it still has the same problem.

[cyborg]

How many miles/ hours on the build,,, unless you seriously overfilled it or there may be a problem with the rings from the build,,,

[conora]

At tops maybe 300 miles since I put the bbk in and it wasn't doing this before I replaced the oil pump.

[icebear2009]

Sounds funny but when I removed all my emission junk off of my 150cc I acidently capped of the vent to my crankcase on the front of the head ....check yours see if capped off or the evaporated system is plugged

[conora]

I can feel air comeing out of the valve on the head I'll take it apart later and look into it. Any idea why I'm getting this extra pressure now?

[cyborg]

Have you been whippin on it??,, break a ring?

[conora]

I'm starting to think the rings could be the problem but would that cause it to blow white somke though the head?

[cyborg]

Of course,,, combustion gasses not contained go around the piston