Advice needed

[Drk_rider]

I broke a piston skirt on a used blaster I just purchased. Pulled the top and found a few small pieces of the skirt and the piston was barely scuffed up. Had the cylinder bored and ordered a wiseco to replace the crappy vertex they had in it.
Now i am getting the bottom cleaned I drained the oil and pulled the motor and getting ready to hit it with solvent to clean it all up I noticed that after I rolled the engine all around and flipped and turned it there is some oil on the crank. Any idea how some oil would get on the crank?

Also the con rod says hot rods. Any way to tell if it is a stroker without splitting the cases? I can not post pics so I need it explained.
Only thing I can find so far is the head needs machined 2mm. what part of the head gets the machining?

 

[super noober]

I broke a piston skirt on a used blaster I just purchased. Pulled the top and found a few small pieces of the skirt and the piston was barely scuffed up. Had the cylinder bored and ordered a wiseco to replace the crappy vertex they had in it.
Now i am getting the bottom cleaned I drained the oil and pulled the motor and getting ready to hit it with solvent to clean it all up I noticed that after I rolled the engine all around and flipped and turned it there is some oil on the crank. Any idea how some oil would get on the crank?

Also the con rod says hot rods. Any way to tell if it is a stroker without splitting the cases? I can not post pics so I need it explained.
Only thing I can find so far is the head needs machined 2mm. what part of the head gets the machining?

sooo the piston hit the head? makes me thing its a stroker crank, hotrods makes a +4. there will always be residual oil on the crank, its a good thing I:I

 

[Drk_rider]

No no the piston didn't hit the head. maybe I did not explain it well. I was rolling it around on the bench while taking off the side covers and stuff. When I started on the flywheel I noticed there was oil on the crank, and that it is a hot rods crank.
So now I need to know if there should be some oil (not 2 stroke oil) in the crank area after rolling it on the bench and how to tell if it is a stroker crank.

 

[Surfrjag]

Check for cracks in the case because there shouldn't be oil in there. The hotrods stroker crank needs the cases to be trenched out for the rod to clear.. does yours have a groove for the rod to clear the inside of the case?

 

[Drk_rider]

Possibly. I looked down in the space below the con rod and it seems there is some wear/machining marks in there where the con rod runs. Ill get a closer look in the morning.

 

[Blaaster]

If you have dropped a skirt, I strongly recommend that you split the cases and remove the bearings and either clean them or replace them.

The breaking off of a skirt is quite possibly going to leave some gritty residue which may or may not get into the bearings. No amount of flushing is going to remove stubborn foreign matter from the bearings.
It only takes one single small grain of foreign matter to take out a bearing.

Play it safe and split, replace the bearings and seals and you just about end up with a new motor anyway.

There will always be a little 2 stroke oil in the crankcase, because oil in the fuel mix drops out of suspension and the rotating parts pick it up and splash it around, thats how a 2 stroke is lubricated.