1972 CB750K
Finally got the project to run!!! A tip for you guys....after Two-tired kept repeating in my previuos inquiries:
"make absolutely sure the carbs and every oriface is sparkling clean" If your cabs have been sitting for over 10 years w/ stale dried up gas and varnish clean them and then clean them again, and once more for good measure. I had mine completely apart and cleaned TWICE before everything smoothed out. I thought they were clean the first time.
Anyway, a recap: new oil and filter, cleaned out oil pan and oil pump - no metal in there - good sign. Carbs cleaned, recleaned new jets, needles and gaskets. New points and condensors. tightened cam chain, adjusted tappets, set timing.
Anyway, it fires right up - I set the idle to about 2500 until it's warmed up, let the choke off and then idle it back down to about 1800. There are some exhaust leaks, mainley around the collars etc - I have some exhaust gaskets that will go in there soon. Let it run for 10 minutes or so...pipes don't seem to be smoking, all pipes temperatures seem to be reasonably close.
Here are my concerns:
1. after it's good and warmed up, it smokes pretty steadily from the breather tube out of the top of the valves as well as
the engine...doesn't look like it's coming from any gasket surfaces, and I'm sure some of it is exhaust leakage, but it seems excessive. Smokes even after it has been shut off like it's HOT. It hasn't been run in at least 10 years so I'm sure it's just burning off junk etc...but it's a bit alarming, maybe I'm just paranoid. Any ideas /
2. The engine itself seems noisier than it should be...like the cam chain or maybe the clutch basket ? I have adjusted the timing chain already. Probably a good idea to do it again since it's been running ? I have also taken the adjuster apart and cleaned it. I'm going to try and post a video later - hopefully it will be able to let you hear it.
3. I'd be suprised if the rings weren't a bit sticky after all these years - Any suggestions there ?
I want to ride it around for a month or so before I blow it apart for paint etc.
4. Would you mess with any kind of oil treatment/cleaner (to clean sludge etc) and running again, then chaning oil again ?
Perhaps some Seafoam or something similar in the oil ?
I'm going to be taking the clutch plates out to make sure they aren't stuck etc...