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Message: [QUOTE="pketchum, post: 668090, member: 32295"] You have the classic symptoms of an air leak that was certainly introduced when you performed your recent maintenance. The ONLY way to really get to the heart of the problem would be to fabricate a "leak down tester" so you can pressurize your engine (closing the exhaust port, introducing air through the rubber carburetor manifold. You should be able to hold 6psi for at least 1 minute. For instructions on how to build one of these see: http://www.westcoasthodaka.com/psitst3.html For a pressure guage don't look for a low pressure gauge but instead look for a vaccuum gauge. Instead of a fuel petcock I used some brass T-valves I found at an ACE True Value store in my neighborhood. I wouldn't worry too much about running the bike at an idle or above with an air leak but don't get it too hot by racing it, or riding it hard, because you may seize the engine. I pressurize the engine, then spray soapy water from a spray bottle on all intake gaskets, base gaskets, head gaskets, intake manifolds, exhaust manifolds, spark plug, cylinder studs, magneto seal, clutch side seal (if I have the clutch out), and also on the case halves. I've seen leaks in weird places like once I found a air leak that was caused by a casting flaw in the barrel that had come from the factory. I build my own Hodaka race engines several times a year and I'd be lost without my leakdown tester. It's the ONLY way to be sure that you've sealed your engine properly! Good luck! [/QUOTE]

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