Author Topic: My First CB750  (Read 1157 times)

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Offline hockeyteeth

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My First CB750
« on: March 15, 2012, 07:50:19 PM »
Hey, everybody. I bought a 71 CB750 recently and have been reading the forums a whole lot as I am rebuilding the top end of the motor. This is a great forum and resource for knowledge! I'm not quite halfway finished with the rebuild, but here is what the bike looks like when it is assembled:

Previously Owned - 1971 CB750 K1

Offline Retro Rocket

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Re: My First CB750
« Reply #1 on: March 15, 2012, 11:49:44 PM »
Welcome Hockey, nice K1 mate.... ;)
750 K2 1000cc
750 F1 970cc
750 Bitsa 900cc
If You can't fix it with a hammer, You've got an electrical problem.

Offline sanglasmick

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Re: My First CB750
« Reply #2 on: March 16, 2012, 03:43:40 AM »
Nice bike, Good luck with it. 8)
http://forums.sohc4.net/index.php?topic=103837.0
1977 CB550F2, 1974 Sanglas 400E, 1981 XJ750A.

Offline MoMo

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Re: My First CB750
« Reply #3 on: March 16, 2012, 03:53:57 AM »
I always liked that color-for some reason it was not all that popular back in the day, most people bought red ;).  Out of curiousity, why did you rebuild the top end?  Welcome, have you downloaded the manual from this site?  Lots of smart people so as questions...Larry

Offline hockeyteeth

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Re: My First CB750
« Reply #4 on: March 16, 2012, 05:09:48 AM »
Thanks for the compliments on the bike! I am excited to get this thing back together with some light restoration and back on the road again.

Larry, I am rebuilding the top end because I was leaking a lot of oil. So far, most of the engine components look to be in great shape (the bike has 23,000 mi.), so I am hoping that replacing all the gaskets, seals, and related rubber parts will do the trick. I am also under the impression that I should replace all the dowel pins. Do any of you know some tricks for coaxing dowel pins that seem stuck? Also, I had a nightmare of a time removing gasket residue from the bottom of the cylinders. I had to use a razor blade, and as careful as I was I still have a coupe of tiny nicks in the aluminum. I've noticed a lot of people saying gasket sealant clogs oil-ways, but should I use a drop of sealant at the nicked areas? Any other recommendations for taking care of surface imperfections on the gasket surfaces other than re-machining? In the past, when I replaced my girlfriend's clutch I had similar difficulty with the clutch cover gasket, but the couple of small scratches didn't produce any leaking. I am hoping for similar luck...

edit: Oh, and I do have a printed version of the manual for my engine.
« Last Edit: March 16, 2012, 05:13:42 AM by hockeyteeth »
Previously Owned - 1971 CB750 K1

Offline MoMo

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Re: My First CB750
« Reply #5 on: March 16, 2012, 06:30:36 PM »
The small nicks should not cause any problem, as long as they are very minor. Use a heat gun on the area surrounding the knock pins, then grab them with pliers and twist, hopefully you'll be able to pop them out. I always reuse them if in good condition...Larry

Offline bender01

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Re: My First CB750
« Reply #6 on: March 16, 2012, 07:59:33 PM »
Welcome. I saw that bike on e-bay. Does the guy you bought it from belong here? Ive seen lots of bikes for sale on that deck I think. Looks like a good bike!
75 550 K1
74 750 K4
1968 450 K1 Super Sport
74 750k 836 project
http://www.bikepics.com/members/bender01/
So, the strategy is to lie to people you are asking for help?

I think I'll be busy going for a ride.

Good luck!
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Online Stev-o

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Re: My First CB750
« Reply #7 on: March 16, 2012, 08:08:15 PM »
Welcome!   How long have you ben working on it?
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline hockeyteeth

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Re: My First CB750
« Reply #8 on: March 16, 2012, 08:46:00 PM »
I don't know if the seller is on these forums. His name was Steve.

I have been whittling away at the rebuild for the past two weeks between work and school. I'm excited to get everything back together and fire it up.

Everything I have removed looks to be in great shape with little evidence of wear. I will compare everything recommended in the manual to serviceable wear limits, but I anticipate getting by with replacing all the seals/gaskets and lapping the valves prior to reassembly.
Previously Owned - 1971 CB750 K1

Offline bluezboy

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Re: My First CB750
« Reply #9 on: March 17, 2012, 04:40:24 AM »
 Welcome to the club. I know your bike and that deck, Steve has worked on my bike a few times also. You have a nice first bike, good luck with it.

Offline Swampotter

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Re: My First CB750
« Reply #10 on: March 17, 2012, 06:07:20 PM »
Welcome aboard.

Offline OpaGreg

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Re: My First CB750
« Reply #11 on: March 19, 2012, 02:57:07 PM »
Welcome, hockey teeth. Good luck with that great looking bike!
Current bikes:  78 CB750K and 07 MV Agusta F41000R
Past bikes:  lots...I've been a little bit of a bike slut over time.

Offline 78 k550

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Re: My First CB750
« Reply #12 on: March 20, 2012, 08:56:17 PM »
Welcome,

Paul
Paul
Littleton, CO

76/77 CB 750F, 
75 GL1000, (AKA GL1-242 NGWClub),
76 GL1000 LTD
84 GL1200 Standard
6 Bultaco's= 42, 49, 121, 152, 167, 188