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Author Topic: Dohc Cb750f: possibly a valve issue  (Read 10487 times)

Offline SquidHunter

  • Posts: 144
Re: Dohc Cb750f: possibly a valve issue
« Reply #110 on: Jun 12, 2019, 23:43:18 »
The good thing is, while the bike has been down Iíve had time to think about what I really want to do. I keep coming back back to the same conclusion: cosmetically, I want to change the tail and tank and after that all I care about is function. My problem with the tank is only that the stock one is worn out. It needs a lot of work. The tail is just unappealing to me. The good thing is, the bike actually rides really good.

Iím really needing to focus in on cleaning up the electrical. I feel like lowering the battery down would be better weight distribution, but Iím limited on how much fabrication I can do at the moment. Aside from that, Iíd like to introduce an m-unit. I like the idea anyway. It would be nice to have blinkers and a horn again.

Iím interested in you guys opinions, and experience etc. Iím trying to make the right decisions with this one. Not too many f models available here


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Offline SquidHunter

  • Posts: 144
Re: Dohc Cb750f: possibly a valve issue
« Reply #111 on: Jun 21, 2019, 21:16:07 »
Talked with power arc yesterday. He still wasnít able to replicate the failure I was experiencing. It has to have something to do with the optical pick up. Heís replacing the optical pick up. Heís going to send me the old unit, and a new prototype.

After I get them, and test them Iíll post another update. I feel like itís something simple and I donít want to give up on it


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Offline pidjones

  • Posts: 1022
Re: Dohc Cb750f: possibly a valve issue
« Reply #112 on: Jun 21, 2019, 22:56:31 »
The "whale tail" on the F is kinda awkward. (as well as the tank) But, without it you have that HUGE azz tail light hanging out there with gnarly wires running around. The rat bike I did over the winter was missing the piece under the tail that filled it in (and had the HONDA lettering). They are real hard to find, so don't trash yours! I filled mine in by gluing together pieces of ABS from a wrecked GL1800 that the Honda service department saved for me. So, if you come up with an idea for what you'd like  to do with the area behind the seat (changing the seat will increase options), using busted-up ABS is an option for putting something together. ABS plumbing cement glues that stuff together real well.
"Love 'em all.... Let God sort 'em out!"

Offline SquidHunter

  • Posts: 144
Re: Dohc Cb750f: possibly a valve issue
« Reply #113 on: Jun 22, 2019, 00:25:19 »
The tail is pretty displeasing, but itís a bit iconic as well. Itís all there. The bike is very much complete, itís just really showing its age. Im fairly certain I can make a 77 tank fit. I would love to know if anyone has ever fit a 450 or 350 tank on one..... a 70s model. I would like to narrow the top a little more so the motor is more prominent. After all, the motor is what makes that bike special. The good thing (in my opinion) about the f model is the 19 front and 18 rear wheel instead of the 16.
Itís going to be tough to chop it up tho. Everything still functions well. I wish it were an easier decision


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Offline pidjones

  • Posts: 1022
Re: Dohc Cb750f: possibly a valve issue
« Reply #114 on: Jun 22, 2019, 07:49:09 »
To make the engine stand out more, just pull the valve cover off and polish the crap out of it, then polish the timing and alternator covers. But yeah, it is kind of hidden tucked under that big tank. A smaller tank is going to dictate a lot more frequent fuel stops, though.
"Love 'em all.... Let God sort 'em out!"

Offline SquidHunter

  • Posts: 144
Re: Dohc Cb750f: possibly a valve issue
« Reply #115 on: Jun 23, 2019, 17:01:01 »
Iíve thought about the frequent fuel stops. The truth is after 100-125 miles, I need to stop any way. The bike currently gets about 250 miles to a tank of gas


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Offline SquidHunter

  • Posts: 144
Re: Dohc Cb750f: possibly a valve issue
« Reply #116 on: Jul 02, 2019, 21:16:39 »
I got my ignition back. Gary replaced the module. He said it looked like a pinched wire, which is totally possible. Iím not too crazy about the placement of the exit shaft which was milled by cycle x. But anyway..... Gary sent some new coils too, which Iím pretty excited about. Iíve almost got everything wired up. Should know something by the end of the week. Fingers crossed. I hope this is it


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Offline SquidHunter

  • Posts: 144
Re: Dohc Cb750f: possibly a valve issue
« Reply #117 on: Jul 02, 2019, 21:19:36 »
Hereís the new coil set up. Two packs daisy chained. Theyíll wire straight to the battery, with a fuse of course


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Offline Sonreir

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Re: Dohc Cb750f: possibly a valve issue
« Reply #118 on: Jul 03, 2019, 11:35:58 »
How are you going to turn them off if you wire them straight to the battery?
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Offline crazypj

  • Posts: 13467
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Re: Dohc Cb750f: possibly a valve issue
« Reply #119 on: Jul 03, 2019, 13:53:45 »
Safer to wire them through a 30A relay, that way you can turn them off when ignition is off. Easier than disconnecting every time
'you can take my word for it or argue until you find out I'm right'
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