Wednesday, January 13, 2010

Winter tear down

Not sure why I'm calling it a winter tear down. LA winters consist of 2 weeks of temperatures below 70 degrees and we might get a bit of rain if we're lucky.

After September's racing I thought I'd have a look and see how the engine was holding up. Everything looked great except the rod bearings. Theories are: not using synthetic oil, oil starvation or lack of clearance between the bearings and the crank. And revving a big Guzzi up to 8700rpm trying to keep up with Steve Arnett probably didn't help.

Solutions: from now on I plan on using full synthetic, either 10/40 or 20/50. Candidates are Amsoil, Mobil 1 V Twin or Brad Penn. Also had the rods honed to give a bearing to crank clearance of .0018" as per Mike Rich's recommendation. Hopefully this will prevent torched bearings.

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