Jdub goes there 1981 650e rebuild

[jdub6092]

Final photo montage

[jdub6092]

Scrapped the video because the idle setting causes a stall after warm up and the hanging throttle has come back. Arggghhh.

[jdub6092]

My analysis of the running issue is that the attempt at salvaging the head after the machinist blunders did not last. Shaving down the cam journals and bearings is a viable repair with precision tooling, I obviously did not meet that standard as the journals had some high spots and a couple of bearings had some scoring marks.
One of the valve clearances had a very large increase from the previous measurement.

Finally getting around to prepping my spare head for installation. Riding season is here so I need to speed it up a bit.

On a side note, I purchased an NOS head gasket from Canada and got hit with a 50% tariff and $25 broker fee. Ouch!

[jdub6092]

Started putting things back together with the replacement head and noticed that all of my intake boots are right side versions. I purchased a full set, i think from Labwork. They dont have any L/R markings. When placed on the left side, they effectively narrow and disrupt some of fuel/air flow. Maybe this is why the carbs were so hard to sync? It ran ok for a while, so im not exactly sure what the total effect would be.

[steve murdoch]

Certainly an air leak from improper fitting or cracked intake boots could cause a hanging throttle and a fluctuating idle which would then make a carb synch very difficult.