[slowbird]

Originally Posted by aaronman

Thanks guys. Sharing to help others in hopes we can keep the brand alive. I'll let Bill Meyer answer any of the tech questions. The refresh was required as I started to see a loss of power after over 300 passes over the past 2+ years.

Hopeful Bill can share what he found when he tore things apart for the rebuild and what caused the power loss

[Jeff Kinsler]

Nice!!

[Bill Meyer]

Thanks, guys. The carb is a hp1250. We tried a brand new 1350 and results were virtually the same. Aaron is very perceptive with his maintenance program and pulled the plug on this one at the right time. Main bearing #2 was getting way too hot and had started coming apart. One of the associated rod bearings was getting bad as well. The crank had a small crack on the 2/1 rod journal which wouldn’t file out, so we replaced the crank for safety. This engine always seems to go after the #2 main first, (don’t they all), so I opened the hole up a little on the 113m this time. Maybe 800 passes this time??😀

[slowbird]

Originally Posted by Bill Meyer

Thanks, guys. The carb is a hp1250. We tried a brand new 1350 and results were virtually the same. Aaron is very perceptive with his maintenance program and pulled the plug on this one at the right time. Main bearing #2 was getting way too hot and had started coming apart. One of the associated rod bearings was getting bad as well. The crank had a small crack on the 2/1 rod journal which wouldn’t file out, so we replaced the crank for safety. This engine always seems to go after the #2 main first, (don’t they all), so I opened the hole up a little on the 113m this time. Maybe 800 passes this time??😀

Did you dobthe oiling mod to the main saddle (groove the saddle and drill feed oil in bearing)?
You don't have say specs but just wonder what were the rough differences between old and new cam?