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Author Topic: DOHC Forum - anything out there? (just picked up a winter project)  (Read 941 times)

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Offline shoemanII

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DOHC Forum - anything out there? (just picked up a winter project)
« on: September 13, 2008, 02:41:49 PM »
ah, me again. :P 

just picked up an '81 cb750c w/22k, nice shape but non-running.  PO couldn't get it to start this spring, then moved to CA.  parents wanted it out of their garage, so i got it for $350.  cold compression readings were 160,145,145,160; plugs seemed ok; drained old gas from carb bowls and tank; new battery and zoom!  all was well with the charging system, so off i went for a 30mile shakedown run.     

a very strong engine all the way to 8k, shifts easily, very good brakes, all electrics work, handling seems more for cruiser than sport, but i'll improve that a bit.  halogen headlight is a nice touch, and the system should accept a 100w h4. 

am wondering, for those of you w/a DOHC, is there an active site around?  am sure i'm gonna need help sometime this winter.  bike came w/a huge factory manual, but still..............

many thanks,
bobp 
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Offline TomC

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Re: DOHC Forum - anything out there? (just picked up a winter project)
« Reply #1 on: September 13, 2008, 06:31:01 PM »
Hi Shoeman II
     Try <www.cb750c.com>.
          TomC in Ohio
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TomC in Ohio
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Offline shoemanII

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Re: DOHC Forum - anything out there? (just picked up a winter project)
« Reply #2 on: September 13, 2008, 08:08:19 PM »
cool, thanks!
bobp
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'96 ducati carb'd 900ss/cr 
'72 dt2
'77cb550k frankenberry:  '77cb550k frame, '78cb550k engine, '78cb550f tank, unknown front-end

Offline Hush

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Re: DOHC Forum - anything out there? (just picked up a winter project)
« Reply #3 on: September 13, 2008, 08:42:09 PM »
Not being a 750 guy, did the CB750 come out in 81 with double overhead cams?
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Offline eurban

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Re: DOHC Forum - anything out there? (just picked up a winter project)
« Reply #4 on: September 14, 2008, 05:46:24 AM »
No, 1979 was the first year of the DOHC.
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Offline bryanj

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Re: DOHC Forum - anything out there? (just picked up a winter project)
« Reply #5 on: September 14, 2008, 07:41:56 AM »
Was common in the day that any 750/900 left for more than 5 days needed the carbs draining before they would run, possibly the lower volatile gas, who knows.

Also very earl 750 had a recall on an oil pathway plate to reduce pressure on the sprocket seal as they could "blow" out and the crankcases have to be split to replace it. I have the bulletin somewhere if you wnt to PM me for the details
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Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!

Offline Raul CB750K1

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Re: DOHC Forum - anything out there? (just picked up a winter project)
« Reply #6 on: September 14, 2008, 12:12:33 PM »
Quote from: bryanj on September 14, 2008, 07:41:56 AM
Was common in the day that any 750/900 left for more than 5 days needed the carbs draining before they would run, possibly the lower volatile gas, who knows.

Also very earl 750 had a recall on an oil pathway plate to reduce pressure on the sprocket seal as they could "blow" out and the crankcases have to be split to replace it. I have the bulletin somewhere if you wnt to PM me for the details




Bryan, could you explain me what's the meaning of "raining in your parade"?    ;D ;D ;D

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Offline 6adan

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Re: DOHC Forum - anything out there? (just picked up a winter project)
« Reply #7 on: September 14, 2008, 06:40:28 PM »
You were lucky it ran good after setting,I have a 81K that was a pain to get the carbs cleaned but after I did it runs very good and strong.
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Offline bryanj

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Re: DOHC Forum - anything out there? (just picked up a winter project)
« Reply #8 on: September 14, 2008, 09:39:03 PM »
Sorry Raul, if you dont know and i divulge it i will have to find you and eliminate, or is it exterminate (dalek) you
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Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!
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