I've put about 270 miles on it. She's been running great with gobs and gobs of new found torque and power. Until the other day
, when things got hot and I noticed she was running uneven and loosing power over 4200 rpm. I pulled the valve covers, and as expected things had tightened up a bit during the initial break in. I also notice a little bit of ground up metal
in the valve cover on left intake. That's not good. I cranked it over to check for oil delivery. All the rockers were pumping oil except for the left intake. Only a small amount is getting through. I'm sort of frustrated because I was meticulous at making sure the passage was clear and sealer was used sparingly. Looks like I'll need to remove the left cylinder and find out what happened. I'm guessing the o-ring somehow came out of position during installation and is blocking some how. The Siebenock kit uses the two small stud orings but does not use a cylinder o-ring. That part is sealed with sealer. I removed the rocker to check for damage. The needle bearings looked OK and no significant ware was apparent other than a little sheen on the ends where they contact the blocks. I slid a thin wire down next to the stud but I couldn't seem to be able to unblock things. I'm guessing the metal I found is from the needle bearings so I will replace them. Should I be concerned about the valve guide?
At least oil pressure is nice and high and stable. If the main bearing had shifted both oil ways would have been blocked...right? The left exhaust side is pumping twice as much oil as both of the rockers on the right side.
http://bmwmotorcycletech.info/oilsketch.htm
