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 Post subject: CB750.... hmmmm
PostPosted: Sat Nov 29, 2008 3:02 pm 
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To the on ramp

Joined: Tue Oct 14, 2008 7:10 pm
Posts: 465
Location: St. Paul, MN
I picked up a fixer upper 1981 CB 750c from my brother in law.

Its got 24,000 miles on it, in okay shape (never been down)

It ran well a year ago or so when I went through it for him (its since been sitting).

It needs sidecovers and exhaust, and the tires mounted on it (previous owner picked up new tires but never mounted them). Other than that it runs right down the road.

Soooo, the question is what to do with it. I can get my cash out of it fairly easily as it sits, or I can use it as a rider for awhile and sell it in the spring. The CX650 is a bit too small for me (my knees come up too far)

I've been thinking about turning it into a street racer, as some of the CB750's look pretty good, but already have enough projects floating around....

Anybody have one of these in the past?

How good are they for miles without overhauling?

Hmmmm... choices choices.

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1954 Harley ST165 basket in the attic
1972 Suzuki GT750 project in the works
1981 Honda CB750-1000 driver
1982 Honda GL500 easy project


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 Post subject:
PostPosted: Sat Nov 29, 2008 11:12 pm 
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Moto GP
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Joined: Mon Nov 03, 2008 10:47 am
Posts: 6054
Location: Illinois
Arne,

You know the answer. Look into to your heart and what do you see? A space where that bike should be sitting with a Cafe Race look.

No need for big bucks. get it running with good rubber and then find/make clipons/clubman bars and rear sets. Find a cheap cafe seat and a 4 into 1 pipe and you're good to go. It can be done progressively once it runs.

Those motor can run for big miles but keep and eye on all those chains - cam- primaries- rear.

The carbs are OK for about 80 plus HP. Dyna ignitions are still available as are exhausts etc. Did you check out the cafe racer website for SOHC 750's?

A man can never have too many projects - except I have too many already... :roll:


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 Post subject:
PostPosted: Sat Nov 29, 2008 11:33 pm 
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On the main road
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Joined: Wed Oct 15, 2008 1:36 am
Posts: 101
Location: Scotts Valley, CA - USA
Country: USA
Bikes owned: T500M
I remember reading someone here used to work on them and recently (past 6 months) picked up a red one - was it possibly Wayne?

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'75 - T500M
'74 - MT250
'73 - CB350F
'72 - SL175 (x2)
'80 - XT500
'85 - XC125
'01 - W650


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 Post subject:
PostPosted: Sun Nov 30, 2008 9:10 am 
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To the on ramp
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Joined: Tue Nov 11, 2008 6:34 pm
Posts: 230
Location: Lavon, Texas
Country: USA
Bikes owned: 1976 GT750
Yea, I picked up a 78 CB750F about six months ago. Rebuilt the carbs, checked the timing and put a battery on it and it fired right up, but the cam chain was REALLY making a racket and the adjuster would not stop the noise. I pulled the engine out last week and was planning to top end it, but once I got it out, I worked on the cam chain tensioner a little and I am just going to adjust the valves and put it back together and see how it sounds.

This is a big heavy bike. I had a 78 750E Suzuki and I really don't remember it being this big and heavy.

Working on one of these really makes you appreciate two strokes. :lol:

Wayne

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Luck will beat skill any time you have enough of it!


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 Post subject:
PostPosted: Sun Nov 30, 2008 12:58 pm 
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"Which one is not like the others?"

Joined: Sat Nov 22, 2008 3:50 pm
Posts: 160
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Last edited by Gordon on Tue Apr 14, 2009 7:26 am, edited 1 time in total.

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 Post subject:
PostPosted: Mon Dec 01, 2008 6:56 pm 
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To the on ramp

Joined: Tue Oct 14, 2008 7:10 pm
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Location: St. Paul, MN
Well, I saw these on my local craigslist today, so I took it as a sign.

Image

Looks like the CB750 will be a streetrod after a few more parts like that!

Thanks guys - Arne

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1954 Harley ST165 basket in the attic
1972 Suzuki GT750 project in the works
1981 Honda CB750-1000 driver
1982 Honda GL500 easy project


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 Post subject:
PostPosted: Tue Dec 23, 2008 7:30 pm 
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To the on ramp

Joined: Tue Oct 14, 2008 7:10 pm
Posts: 465
Location: St. Paul, MN
I picked this CB1000 engine up off the local craigslist, with a little crankcase modification and jug swap action I'll have a chain drive CB1000.

Now it's starting to look like a project!

Image

I'm not quite sure how racy it'll end up.... as it's going to be a sizeable bike when its all said and done. Maybe just a ducktail seat and a new paintjob will wrap this one up....

QUESTION:

They've been telling me that the stock CV carbs will need limited adjustment (apparently they're tolerant of changes on these honda 4 strokes)

With new exhausts and 350 more cc's I'd be surprised if I didn't have to re-jet, but I'm not a four stroke guy. Anybody know the answer?

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1954 Harley ST165 basket in the attic
1972 Suzuki GT750 project in the works
1981 Honda CB750-1000 driver
1982 Honda GL500 easy project


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 Post subject:
PostPosted: Tue Dec 23, 2008 11:17 pm 
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AMA Superbike
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Joined: Tue Oct 14, 2008 6:47 pm
Posts: 1729
Location: Blythewood, SC, USA
I'm not sure the answer is known! Good luck with it. Should be interesting.


Lane

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If you stroke it more than twice; you're playing with it.

Too many bikes, too much time, ENOUGH SPACE, FINALLY! Never enough money.........


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 Post subject:
PostPosted: Wed Dec 24, 2008 7:34 am 
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"Which one is not like the others?"

Joined: Sat Nov 22, 2008 3:50 pm
Posts: 160
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Last edited by Gordon on Tue Apr 14, 2009 7:26 am, edited 1 time in total.

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 Post subject:
PostPosted: Mon Dec 29, 2008 6:13 pm 
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To the on ramp

Joined: Tue Oct 14, 2008 7:10 pm
Posts: 465
Location: St. Paul, MN
Gordon wrote:
Here's mine -- pretty much bone stock except for the Supertrapp exhaust and the paint job.

Image


Very cool. Did that DOHC come with the CB750 four logo on it?

_________________
1954 Harley ST165 basket in the attic
1972 Suzuki GT750 project in the works
1981 Honda CB750-1000 driver
1982 Honda GL500 easy project


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 Post subject:
PostPosted: Mon Dec 29, 2008 6:41 pm 
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"Which one is not like the others?"

Joined: Sat Nov 22, 2008 3:50 pm
Posts: 160
Deleted


Last edited by Gordon on Tue Apr 14, 2009 7:26 am, edited 1 time in total.

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 Post subject:
PostPosted: Thu Jan 01, 2009 8:02 pm 
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To the on ramp

Joined: Tue Oct 14, 2008 7:10 pm
Posts: 465
Location: St. Paul, MN
So I picked up some honda line rear hardside luggage pieces. In decent shape, but they have a couple hairline cracks in them around the handles and latches.

I'm going to paint them, but don't want the cracks to transgress through - I'm not a body work guy by any means.

Options that come to mind are:

Epoxy

Fiberglass patching kit.

Plastic welding.



Anybody ever done this sort of thing before?

Image


Image

(I didn't pick up the parts bike, just the hardsides off it.)

_________________
1954 Harley ST165 basket in the attic
1972 Suzuki GT750 project in the works
1981 Honda CB750-1000 driver
1982 Honda GL500 easy project


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 Post subject:
PostPosted: Thu Jan 01, 2009 11:33 pm 
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AMA Superbike
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Joined: Tue Oct 14, 2008 6:47 pm
Posts: 1729
Location: Blythewood, SC, USA
I had a similar set of bags. I did lots of repairs on them with fiberglass.



Lane

_________________
If you stroke it more than twice; you're playing with it.

Too many bikes, too much time, ENOUGH SPACE, FINALLY! Never enough money.........


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 Post subject:
PostPosted: Wed Jan 07, 2009 11:08 am 
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On the main road
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Joined: Sun Jan 04, 2009 7:15 pm
Posts: 157
Location: Rock Hill SC
i had an 81, i hated it. was a tank and those carbs were a PIA. but, it ran for 3 years till it slung the timing chain.

the sohc bikes, much better imho. had a75f for 6 years. never missed a beat.


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 Post subject:
PostPosted: Thu Jan 08, 2009 12:32 am 
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Moto GP
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Joined: Mon Nov 03, 2008 10:47 am
Posts: 6054
Location: Illinois
I had a CB900 along with a few spare CB750 and 900 motors a few years back. The worst job was grinding valves and setting the shims.

Once I had it together it looked great and sounded great but I struggled with the carbs and in the end I put the stock airbox back on. Those carbs are not easy to set up.

As soon as it ran great i sold it. Time to move on to the next project...


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