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Author Topic: CB750 rat bike?  (Read 5594 times)

Offline pidjones

  • Posts: 610
Re: CB750 rat bike?
« Reply #100 on: Dec 22, 2018, 14:13:38 »
Honestly, I need to stay away from this bike for a while. But, parts are supposed to be in this afternoon, so....  Good thing, too because I decided to check that J cap in an F position. They had jambed screws in the cross-drilled supply holes in the cap, and RTVed the bolt holes. And of course, broke one of the cap bolts off. I was able to remove the broken bit with little drama, then spent time picking out RTV.  Bolts are supposed to be included with the caps I bought, so hopefully things will get better.
"Love 'em all.... Let God sort 'em out!"

Offline pidjones

  • Posts: 610
Re: CB750 rat bike?
« Reply #101 on: Dec 22, 2018, 20:38:35 »
Swapped in new (used) F and L caps after first Plastgage testing them - both between .003 and .004 inch. Measured with both cylinders on respective side with lobes away from lifters. Final assesmbly with assembly lube on the bearing surfaces. New chain came in too, but it will wait for tomorrow or Monday for installation. Good weather forecast for next week, so hopefully there will be a chance to run it through the gears to make sure that is all fit.
"Love 'em all.... Let God sort 'em out!"

Offline pidjones

  • Posts: 610
Re: CB750 rat bike?
« Reply #102 on: Dec 27, 2018, 14:10:41 »
Chain is now mounted. Rolled it out this morning, hooked up the aux fuel cell with ~ 1/2 liter real gasoline, and fired it up. Once warmed enough to take off the choke I ran it through all 5 gears (on center stand). Clutch engages/disengages well, all gears work and sound pretty good (chain is hitting the plastic chain guard some, so need to adjust that). Then shut it off and hooked up the mercury sticks (old MotionPro unit). Balanced the carbs, lowered idle, balanced again. Have not touched pilot screws - all set at 3 turns open. Aircut valves are disabled.

Guess the next thing other than fixing the seat rear cowl assembly is tires (ouch$$). Thinking maybe getting a bunch of wrecked Honda plastic from the dealer and gluing it together to patch the existing cowl assembly now that I've pried 3 pounds of Bondo off of it..
"Love 'em all.... Let God sort 'em out!"

Offline pidjones

  • Posts: 610
Re: CB750 rat bike?
« Reply #103 on: Dec 28, 2018, 11:49:06 »
Ordered new Kenda 657s for the '79 CB750F rat bike. Not in a hurry for them, as it will be a couple months before decent riding weather, and I have a showw in a couple weeks to get the GL1000 ready for, plus rides scheduled for the GL1800 (weather permitting).
"Love 'em all.... Let God sort 'em out!"

Offline pidjones

  • Posts: 610
Re: CB750 rat bike?
« Reply #104 on: Jan 19, 2019, 11:12:47 »
The Kendas are mounted and wheels back on. That's about as far as the weather and my health could take her this week. Came down with a cold that knocked me out until yesterday, when I went to the funeral of a high school classmate and then to see a cousin in a nursing home that is not doing well at all. I still need to drain the fuel from the tank into my waste gas jug to get rid of the fogging oil and storage spray grease that I'd put in the tank and never flushed out. I'm sure that is a major cause of the smoke that she displayed before, because she doesn't smoke on the auxiliary tank. The weather has turned its typical East Tennessee January/February crud. Maybe the middle of next week it will settle and I can at least try to ride around the neighborhood.
"Love 'em all.... Let God sort 'em out!"

Offline trek97

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Re: CB750 rat bike?
« Reply #105 on: Jan 19, 2019, 18:21:32 »
Wow, I think just about everyone, including myself, have turned into Hermits.

Hunkered down in garage, trying to tinker the foul weather away.

Good to hear you're still moving right along.  I put Kendas on Rachels Hondamatic (not 657s) but I love them.

Offline teazer

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Re: CB750 rat bike?
« Reply #106 on: Jan 20, 2019, 00:21:17 »
No riding around our 'hood in all this snow and the east coast is likely to be bad for a couple of days too.  Hang in there and it will eventually improve.