Author Topic: resurrecting my 78 750 after almost 4 years of sitting  (Read 1904 times)

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Offline kball

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resurrecting my 78 750 after almost 4 years of sitting
« on: May 18, 2012, 12:55:35 AM »
Finally decided to drag out my 78 cb750 from the corner of the garage. The throttles are stuck, I think the carb slides are gummed up. I'll be putting a set of carb kits in them to freshen them up and i'm thinking about ordering some jets up so I can use my pod filters and 4-1 exhaust.

I'm reading all sorts of things, from the pilots can't be jetted to drill them out with a drill bit. I'm at sea level and will be tearing into this on the weekend.

Offline dhall57

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Re: resurrecting my 78 750 after almost 4 years of sitting
« Reply #1 on: May 18, 2012, 04:08:37 AM »
Pictures ;D thanks
1970 CB750KO
1971 CB500KO-project bike
1973 CB350G- project bike
1974 CB750K4-project bike
1974 CB750K4
1976 CB750K6
1977 GL1000
1997 Harley Wideglide

Offline bjatwood

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Offline kball

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Re: resurrecting my 78 750 after almost 4 years of sitting
« Reply #3 on: May 21, 2012, 04:45:58 PM »
Here she is, stone stock ready for the pressure washer. Hopefully i'll find some jetting advice on here because I have a 4-1 exh going on and maybe pod filters if I decide to use em. I have them in a box somewhere but have heard mixed opinions about using them.

Offline Dannodarko

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resurrecting my 78 750 after almost 4 years of sitting
« Reply #4 on: May 21, 2012, 04:49:25 PM »
She's a beauty!!

Offline TwoTired

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Re: resurrecting my 78 750 after almost 4 years of sitting
« Reply #5 on: May 21, 2012, 05:55:50 PM »
Stuck slides can be freed up with a heat gun on the carb bodies and a bit of wd-40 squirted on them.
I don't know why you need carb "kits", unless you find metal eating things inside them.

Good luck with the pods.  Sometimes cheap is as cheap does.   But, they will make it easier to take the carbs off and on 40 times before the jetting is "good enough".

Was it running when parked?  ;D
 If so, free the carbs replace the fluids, and run it.  Check the gas tank for corrosion bits that the carbs will NOT like.  Have fun riding it.

Cheers,
Lloyd... (SOHC4 #11 Original Mail List)
72 500, 74 550, 75 550K, 75 550F, 76 550F, 77 550F X2, 78 550K, 77 750F X2, 78 750F, 79CX500, 85 700SC, GL1100

Those that learn from history are doomed to repeat it by those that don't learn from history.

Offline MCRider

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Re: resurrecting my 78 750 after almost 4 years of sitting
« Reply #6 on: May 21, 2012, 06:08:55 PM »
great looking bike.

GO EASY with the pressure washer! They can do a lot of damage to wheel bearings, electrics switch gear and the like, forcing water in thru openings in the frame to pool and rust,forcing water into the seat upholstery, etc.

Much better to just use low pressure from a garden hose, and a very soft like toilet brush, soft cloth on a stick style. Bucket of warm water and soap.
Ride Safe:
Ron
1988 NT650 HawkGT;  1978 CB400 Hawk;  1975 CB750F -Free Bird; 1968 CB77 Super Hawk -Ticker;  Phaedrus 1972 CB750K2- Build Thread
"Sometimes the light's all shining on me, other times I can barely see, lately it appears to me, what a long, strange trip its been."

Offline kpier883

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Re: resurrecting my 78 750 after almost 4 years of sitting
« Reply #7 on: May 21, 2012, 06:15:29 PM »
Love the bike!

But I am wholeheartedly opposed to pressure washing motorcycles.  I don't even like to use a water hose, preferring a wet rag with soap followed by a wet rag without soap.  The bulk of my cleaning occurs with Mother's Carnuba wax with cleaner. 

Now for my reasons, valid or not.  I don't like the thought of water getting past the headers or carb boots and into the intake or exhaust ports.  Also don't want water up the exhaust or in the frame, inside the gauges, the wheel bearings, in the cable housings, inside the bushing of the swingarm, the bushing through which the brake pedal passes... you get the idea.  I would definitely recommend getting the bike running before a pressure wash so that you could ride it for a while immediately after a wash to help dry it out.

That will be $.02  ;)




74 CB750
80 CBX
82 KZ1000 K2 (LTD)
57 1/2 ton chevy

Offline kpier883

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Re: resurrecting my 78 750 after almost 4 years of sitting
« Reply #8 on: May 21, 2012, 06:16:52 PM »
Dang, MCRider beat me to it while I was typing
74 CB750
80 CBX
82 KZ1000 K2 (LTD)
57 1/2 ton chevy

Offline MCRider

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Re: resurrecting my 78 750 after almost 4 years of sitting
« Reply #9 on: May 21, 2012, 06:23:42 PM »
Dang, MCRider beat me to it while I was typing
worth saying twice.  ;D
Ride Safe:
Ron
1988 NT650 HawkGT;  1978 CB400 Hawk;  1975 CB750F -Free Bird; 1968 CB77 Super Hawk -Ticker;  Phaedrus 1972 CB750K2- Build Thread
"Sometimes the light's all shining on me, other times I can barely see, lately it appears to me, what a long, strange trip its been."

Offline Stev-o

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Re: resurrecting my 78 750 after almost 4 years of sitting
« Reply #10 on: May 21, 2012, 06:32:02 PM »
+3 - no pressure washer. How's the inside of the tank look?
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline kball

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Re: resurrecting my 78 750 after almost 4 years of sitting
« Reply #11 on: May 21, 2012, 06:41:51 PM »
Inside of the tank is absolutely immaculate! I lucked out with this bike as most half its age have at leaast some rust. It has literally no rust. I wanted to swap out to an older style tank, but the 77,78 tanks are growing on me and may just go with it. It has a few dings and chips but overall is very workable.

I agree with you guys about the pressure washer, but I intend to tear this bike right down and detail everything. I'm relacing the rims with new spokes and an 18" rear wheel, new wheel bearings etc. I know the negatives of pressure washing but the bike was a lot grungier than it looks in that pic. If the   water is not shot right at seals, and other obvious sensitive spots, you can get away with it.

It's not idling now so that's the reason I need to get into the carbs. I have a 4-1 exh and would keep the stock system, but it's got large chunks of the chrome flaking off and looks terrible.
« Last Edit: May 21, 2012, 06:46:39 PM by kball »

Offline bjatwood

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Re: resurrecting my 78 750 after almost 4 years of sitting
« Reply #12 on: May 25, 2012, 05:25:46 AM »
The bulk of my cleaning occurs with Mother's Carnuba wax with cleaner. 

I use this stuff religiously! And between waxings use the quick detailer spray, eats bugs and tar like a hot knife thru butter!
Brian
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I believe that the Finest things are the most thoughtfully made, not the most expensive!
http://minibikers.proboards.com/