TOPIC:

They could be coming apart inside.
Steve

Just tore the carbs down again, sprayed out all passeges with cleaner and compressed air. Didn't notice any gunk. Bike still doesn't want to run.

Starting to suspect ignition timing or maybe my advancer is stuck. Just never had a bike run this good and just quit.

Just wondering if you don't have a lose or partial open someplace. I would go through the connections and clean them up. Slap a little dielectric grease on them, that might do it. I know the older bikes that I work on all have corrosion on the inside of the connectors and doing this little step always seems to limit the electrical gremlins. Hope that helps.

Screws backed out of the timing plate. Previous owner downgraded from cdi to points and didn't use lock washers.

Well at least you found what might be the issue. So no CDI box on the bike? Wondering if they changed out the engine? Can't remember how to run the engine VIN to see what yr it was. I have seen a page someplace for that though. Hope you get her up and running soon. Just wonder if that is the original yr engine for that frame? As long as you found the issue, get to riding.

Idk, it's got the 34mm carbs so it's post 1980. My guess is the cdi box burned up so they put points on it.

Squared up the timing and ran it around the neighborhood. Fun little bike! Clutch slips on hard shifts but runs strong all the way to redline.

Startup video:

Starts up faster than a new Cadillac! Nice! Ed

Good job. Is that a Honda next to it?
Steve

Yeah that's the 73 cb750 mentioned in my signature. Cycle x 849 10.5:1 piston kit, cx3 grind cam, fully rebuilt and ported head with bronze guides, oversize lightened valves, kibblewhite springs, racing cam chain tensioner, dyna ignition, open velocity stack induction, mac header with a straight through glass pack muffler of my own design, koso fully electronic multi function gauge, rebuilt and restoring forks with billet brace, all balls steering head bearings, new swing arm bushings, tec cb900 shocks, o-ring chain with -1/+4 sprockets, custom built seat, custom bobbed fiberglass rear fender, old Harley tombstone tail light..... she's my master work.

Fast bike but nothing compared to the 03 Suzuki bandit 1200 I built that's in front of the kz... that thing is wild, 130 HP and 93 lbs torque to the wheel.