Re: 1976 CB360t Slightly modified restore to roadworthiness - Beauty later project
Had setback 2 days ago. The bike started missing on the right cylinder, then quit. Let it sit overnight.
Took the carbs out and checked them.
Did some more work yesterday today. I re-installed the carbs. They were clean, and looked good.
I cleaned up more wiring, and reinstalled the tank.
I rolled it out of the garage to see what I could do about the right cylinder missing.
I started it up, and it ran well, except for the right carb, which needed the idle screw tweaked.
It ran VERY well....Warmed up, sounded good. I wanted to keep it running and wean the carbs a little more.
I also checked the charging circuit. The Alternator charges the battery at 3400 RPM with over 13.6 volts, low beam on. Also checked for presence of AC colts, which would indicate a faulty rectifier. No AC, so it was good. All along it was running well, sounding good, idling evenly.
Suddenly, it started backfiring a little. I though maybe the carbs again. I could rev it, but at idle, the right cylinder was cutting out. I opened the points cover to see if the points were opening, arcing, or shorted to the case cover when hot, but no difference.
As it ran longer, it got to the point where it was running only on left cylinder. thought it may be the carb.
then it wouldn't run on the left cylinder well, then quit completely. It would crank, turn over, start to run on the left, but die again.
I turned it off to regroup.
After being off I decided to get some starting fluid to see if the right would fire if I sprayed a little ether in it. This can help you decide if it is fuel or ignition.
It started an ran on two cylinders for a moment, then back to left. I sprayed into the right cylinder, nothing. this is usually and indicator of a spark issue.
It started raining, and I couldn't go further, but I suspect it will run cold and warm, but not hot.
I suspect ignition maybe coils, and I will check that further. Also, I was using a jumper battery, so as not to run down the bike battery. Had 12.7 volts at all time. So it is not a voltage issue.
It's funny how well it runs cold and warm, but goes away hot. It backfires a lot too....So I also suspect a possible valve issue. But it is backfiring on the left, not the right....the but it gets weak enough that the bike won't even start or run on the one cylinder.
In addition, I discovered a little issue that I had forgotten about. My left front lower motor mount on the engine casing is broken. A lot like seen in these forums. So I am going to need a lower case to fix it. So this winter, the engine is coming out, and we are going to do a good inspection of the lower half and heads.
I also found an acquaintance with a complete motor. Possibly some other pieces, and maybe a stock exhaust. He has so many exhaust systems in his barn, he is not sure if he has it, but is willing to part with it if he does. He says he is going to be reasonable, so I may pick up a whole motor, if not for the lower case, maybe for a spare.
This sets me back a little as the bike was otherwise able to be ridden. but it is all nut, bolts and dollars. I have the ability to fix it, and will...
I also built a soda blaster, a little more durable then the air blower jammed in a plastic tube. I'll post pictures when I take them and show everyone.