Originally Posted by
mattyb13
Alright, so I guess I am going to tear my GO .21 5 PORT MODDED engine down and rebuild. It is 2 Gallons of Trinity 30% old. I think the front bearing went. The engine was acting like it had a nasty air leak and the lower crank case was getting wayyy too wet for me to be comfortable. Looking for some advice on how to rebuild this thing. I figure I might as well either replace the piston and sleeve or at least get it repinched.
1. Where do I get a main bearing for this thing?
2. How do I change out the main bearing? I have heard about an oven?
3. Are there other bearings I need to chang out while its torn down?
4. I am clueless as to what to do with the piston and sleeve.
5. What about other internals? Am I replacing anything else???
THANKS!
Since you have it apart you might as well change the rod and piston pin and clips. I charge $35.00 to rebuild and replace bearings, rod, etc. This would include pinching the sleeve if it needs it, also includes return shipping in the Usa. Here's a breakdown of the parts cost, I usually have all this in stock. A new piston and sleeve is a pain, you have to go through the whole break in process. I have pinched motors 3-4 times.
Rear Tko ceramic $22.99
Front Tko ceramic $15.00
Go rod $18.69
piston pin $3.39
clips $1.69
I use a bore guage to check the rod, if it is worn less than .001 I would just leave it.
Rex