Dismantle the crank case?

Update:

I managed to split the case, using MikeJ's heat tip, thank you. However now it appears that my clutch shaft is fine, but the bearings are really bad.

:(
 
Crankcase

Here's a question for you guys who have taken crank case it apart. my 66cc grubee When manually turning crank it binds up on part of the cycle hard to turn,then it goes easy, etc. Took head off and piston out but still the same. Excited to hear ideas before opening it. Thanks in advance.:cool:
 
seal instalation

The hardest part I found at first when putting the engine back together was the seals. The little spring seamed to always pop off of the seal lip. Now I put the seals in after the casings are back together. What ways do you guys use for instaling the seals
 
Here's a question for you guys who have taken crank case it apart. my 66cc grubee When manually turning crank it binds up on part of the cycle hard to turn,then it goes easy, etc. Took head off and piston out but still the same. Excited to hear ideas before opening it. Thanks in advance.:cool:

sounds similar to my original problem, that i traced back to a bad bearing. Mine was clutch problems, but it's quite possible that you have a bad crank bearing.
 
Rings

sounds similar to my original problem, that i traced back to a bad bearing. Mine was clutch problems, but it's quite possible that you have a bad crank bearing.

Whell did'nt crack case. but flushed it out w/WD40:whistle: got some debris and metal flakes out. seems smooth now:cry:. while putting piston back togather noticed top ring cracked and fell apart, guess this explains why there's a huge gash in cyl. wall and piston head looks like the moon. I just need to get it back on the rode.:mad:
 
The hardest part I found at first when putting the engine back together was the seals. The little spring seamed to always pop off of the seal lip. Now I put the seals in after the casings are back together. What ways do you guys use for instaling the seals

Any of the following that is the same size as the outside of the seal and will not hit the lip of the seal:
Deep well socket, Sprinkler pipe, Gas pipe, Medicine bottle, Anything similar.
Always oil the seal well inside and out before installing it.
 
Crack the case

Update:

I managed to split the case, using MikeJ's heat tip, thank you. However now it appears that my clutch shaft is fine, but the bearings are really bad.

:(

Did you have to remove the chain sprocket. If so how. could'nt get mine out. or the Sm. gear by clutch assembly. is this necessary to crack case. need more input please. :bowdown:
 
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