Originally Posted by
ConciliumDesign
+1 TKO is the way to go
I think my front (Gen5 7 port, 1 gal in and just beginning to loose hard pinch) engine bearing is leaking a little because there is a little dirt build up on the chassis under the front of the engine after each run. Will this drastically affect performance and/or the tune? It's seems to be running fine. Can I wait until 2gal point when I replace the con rod? I'm thinking about installing a set of TKO ceramics anyway.
My Gen 5 5 Port is the same, as was my Gen 4 5 Port. Just a little seepage. Itīs nothing to worry about. My motors running sweet as. If you want to, pop the flywheel off and spin the crank. If the rubber seal is moving around with the inner bearing race, then look at replacing the bearing. If the seal is stationary and just the inner race is turning as per normal it will be fine. If itīs leaking badly your motor will be running a little hot and it probably wonīt hold a tune.
2 gallons seems to be the general rule when changing rods after break in. By then pretty much all the pinch is gone so you can start running the new rod with no extra strain on it. Slip in a new wrist pin and G clip too, just for added peace of mind.