Crankcase engine Fault Please help

[kpretro84]

Ivan141 Wrote:This is still all a bit odd to me.. you said your redtop block is rebuilt. If it is, it shouldn't have much blow-by, even if the rings havent worn in yet.
Someone correct me if I'm wrong. I also wouldnt be to keen on swapping blocks if I just rebuilt the engine.

About the breather hole: that is the place the engine is supposed to vent its excess pressure.. if it's not blowing there, but is in other places, something most likely is blocked. Try blowing air into it with the engine turned off.. you should be able to blow freely.

i dont know if you have read everything above ive also mentioned that am not the one rebuilt the smallport. I will however try blow air through and get back with results. the blue top is just a spare incase i blow the smallport.