glamisaurus Posted October 15, 2006 Report Posted October 15, 2006 (edited) Put in a used crank and discovered the left main seal leaking when pressure testing the crankcase. The crank is perfectly smooth where the seal rides. I figured the seal got torn somehow so I replaced both seals and have the same problem on the left side. I have done this before without any problem and the crankcase would hold 6 psi for a couple minutes. The seal is installed green side out. Any ideas? Edited October 15, 2006 by glamisaurus Quote
black sunshine Posted October 15, 2006 Report Posted October 15, 2006 Positive the crank is straight? Try checking the radial runout... Quote
glamisaurus Posted October 15, 2006 Author Report Posted October 15, 2006 Didn't think of the crank being bent. I just went out in the garage with my bottle of soapy water figuring if the crank is bent the bubbles will follow the crank around or come from the same spot on the seal if the seal was cut. So I pump up the crankcase and bubbles start coming from the seal. As I turn the engine over about 5-6 times the bubbles stop and the thing has now held pressure for over ten minutes. I think this bike is possessed. Quote
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