Author Topic: CB750 in Austin  (Read 3443 times)

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Offline eelliiss

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CB750 in Austin
« on: October 02, 2012, 10:13:51 AM »
Hey, guys.  I hope all is well.  My name is Ellis, and I recently came back to motorcycles after a 10+ year sabbatical.  I am a proud new owner of a 75 CB750, and I hope that I can join this community for info, help, and camaraderie. 

Offline mono

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Re: CB750 in Austin
« Reply #1 on: October 02, 2012, 01:19:20 PM »
welcome, Ellis!  everyone here is pretty helpful and just snarky enough to be motivational ;) 

got pics?   we all love the pics.

 - Dean

Offline eelliiss

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Re: CB750 in Austin
« Reply #2 on: October 02, 2012, 01:48:58 PM »
I have this pic from when the bike was first delivered to me.  It now has Carpy's exhaust.  Being rejetted and rear wheel is being relaced this weekend.  Wheels will be dropped off at the powdercoater on Tuesday to get a good, glossy black finish. 


Offline CycleRanger

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Re: CB750 in Austin
« Reply #3 on: October 02, 2012, 04:36:52 PM »
Howdy welcome!  Looks like a nice bike.
Do you have a copy of the Honda Shop Manual or Parts List for your bike? Get one here:
https://www.honda4fun.com/materiale/documentazione-tecnica
CB750K5        '79 XL250s     CL350K3
CB750K3        '76 XS650      '76 CJ360T

Offline eelliiss

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Re: CB750 in Austin
« Reply #4 on: October 02, 2012, 04:38:58 PM »
We might need to link up!  Based on your stable, I'm sure you've forgotten more than I could probably ever know!

Offline CycleRanger

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Re: CB750 in Austin
« Reply #5 on: October 02, 2012, 04:59:34 PM »
More like I forget that I don't know and try it anyway.  ;)

Visit this site: http://www.honda4fun.com/   and get the shop manual and the parts list.
It'll come in handy. :)
Do you have a copy of the Honda Shop Manual or Parts List for your bike? Get one here:
https://www.honda4fun.com/materiale/documentazione-tecnica
CB750K5        '79 XL250s     CL350K3
CB750K3        '76 XS650      '76 CJ360T

Offline Pecantree

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Re: CB750 in Austin
« Reply #6 on: October 02, 2012, 07:03:35 PM »
Welcome and Howdy!
nice bike, where did it live before?

Steve
http://www.harvestclassic.org/

"The suspect had experienced a ballistic interlude earlier in the evening" Miss Pao said, "Regrettably not filmed, and relived himself of excess velocity by means of an ablative technique."         ......    ?    ........         "She say you have road rash."

Offline eelliiss

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Re: CB750 in Austin
« Reply #7 on: October 03, 2012, 07:35:31 AM »
Thanks for the warm welcome.  If I'm not mistaken, it was a NY bike. 

Offline Stev-o

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Re: CB750 in Austin
« Reply #8 on: October 04, 2012, 05:29:24 AM »
Welcome Ellis, looks like a great bike!

There is a great event in a couple weeks that a lot of us SOHC owners are going to...

http://www.harvestclassic.org/
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline eelliiss

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Re: CB750 in Austin
« Reply #9 on: October 04, 2012, 08:50:10 AM »
Welcome Ellis, looks like a great bike!

There is a great event in a couple weeks that a lot of us SOHC owners are going to...



I can't bring the bike out there as I'll have my son with me, but we might drive up there.  It would be nice to meet some fellow enthusiasts.

Offline eelliiss

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Re: CB750 in Austin
« Reply #10 on: October 11, 2012, 09:11:40 AM »
Can anyone here locally help me diagnose a problem that I have with a slipping clutch?  It's getting frustrating.  I don't have the Clymer manual in the mail just yet, but I am reading an insane amount here and other various sources online. 

I've switched the oil to Mobil 1 synthetic car oil.  Many people, including on this forum, have mentioned that this should be ok.  I know that there is a very bitter divide between those that use motorcycle-specific oils, car oils, and synthetics.  I feel that it cannot just simply be the oil, which is what some people have told me.  Clutch is not catching at all, even when the lever is fully disengaged.  This is typically when the bike is cold.  It progressively gets better when as it gets warmer.  Once I get the manual, I will feel more comfortable taking things apart, but right now I'm curious if anyone is willing to take a look at it in person.  It is a huge favor to ask.

Thoughts?

Offline CycleRanger

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Re: CB750 in Austin
« Reply #11 on: October 11, 2012, 12:13:53 PM »
You can download the shop manual here: http://honda4fun.com/materiale-documentazione-tecnica/shop-manual

The adjustment procedure is in there.

As far as oil, really you should use motor oil designed for use with a wet clutch, be it natural or synthetic.
I.e. four-stroke motorcycle oil.
Do you have a copy of the Honda Shop Manual or Parts List for your bike? Get one here:
https://www.honda4fun.com/materiale/documentazione-tecnica
CB750K5        '79 XL250s     CL350K3
CB750K3        '76 XS650      '76 CJ360T

Offline eelliiss

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Re: CB750 in Austin
« Reply #12 on: October 11, 2012, 01:20:45 PM »
Thanks for the quick reply.  I'll give it a shot and report back the results.

Offline eelliiss

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Re: CB750 in Austin
« Reply #13 on: November 10, 2012, 12:39:07 PM »
Hey dudes, just a quick update.  It did indeed just end up being a quick adjustment.  I'm glad I went with intuition.  Everyone told me to just change the oil first and then get back to them.  Well, that would've been a pain in the ass because I would have to remove Carpy's exhaust, replace the crush gaskets, and spend more money before resorting to the cheap/free potential solutions.  Bike runs like a beast now.  :)

The bike was backed into and knocked over about a month ago, so I finally worked things out with the other party's insurance.  The tank is being repainted at Sideways Auto Salon.  I was initially thinking of trying to handpaint the tank emblems to freshen them up, but I decided to buy some NOS ones on eBay. 

Since the tank is at Sideways and inoperable, I decided to update some of the normal wear and tear parts, many of which I didn't even inspect before ordering the parts.  The old shoes and springs for them are in great condition if anyone needs them.  They shoes actually look new besides all the dust that has accumulated on them.  Some of what will go on the bike tomorrow will include new clutch cable, throttle cables, brake hoses, brake pads (I got a new seat pad and caliper o-ring as well), master cylinder rebuild kit, black clubman's (the old chrome/polished ones are up for grabs), shoes with springs, clutch lever spring, rear shocks, Progressive fork springs, titty grips, master cylinder rebuild, wheel bearings, and a few other miscellaneous things.  All the associated OEM dust boots, o-rings, etc. freaking add up.  Holy jeebus.

Parts:



Here is the bike as she sits:

Naked!



I powdercoated the rims, spokes, hubs, caliper, drum cover and inner rim of the rotor gloss black.  I left the nipples as is since I didn't want to screw up any powdercoating while truing.  I got it done at Metalink for $65 a wheel.  A little bit of delays on their part, but I heard it was to be expected.  It was too good of a price to pass up.  Got everything back yesterday, and I think they came out beautifully.  I forgot to remove a few rubber bits, and the powdercoaters had an oversight, so they stretched/melted in the baking process.  I also forgot to include the right cover that goes over the retainer, but I think it might work out well.  Might be a good contrast to all the black if I polish it.  I didn't coat the drum/shoe arm either, so again, I hope my forgetfulness will actually pay off in terms of aesthetics.  If not, dammit.  My goal of getting the bike in fighting condition by tomorrow is delayed as I'll have to wait on those parts now.  Suck.  I guess I'll polish the forks while I'm waiting on the parts.





Bonus pic of a professional shoot of my son and I done by Danial Mora.  The location is Liberty on E 6th.  He loves the jacket so much that I have to keep the air conditioning on all the time.  He won't take it off!



This is the first time I've really worked on a bike, so it's been quite the educational experience.  It has been a pretty smooth transition as I've always been a shadetree mechanic with my cars.  I had all the issues that any newb would have, ie. removing the bearings, bearing retainers, etc, but it has really gone pretty smoothly.  I'm really most concerned with truing the wheels at this point, but I think I should be fine with the stand and dial indicator I purchased.  I have a friend that works at a bicycle shop helping me too.  From what I've read, it's a walk in the park compared to a road bicycle wheel. 

Thanks for looking!


Offline Retro Rocket

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Re: CB750 in Austin
« Reply #14 on: November 10, 2012, 03:39:29 PM »
Nice bike eelliiss, just a word of caution with synthetic oils mate, if they contain friction modifiers then they will make your clutch slip, the clutch in these old bikes sits in an oil bath, so anything that reduces friction can make your clutch slip.... ;)
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 eelliiss

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Re: CB750 in Austin
« Reply #15 on: November 10, 2012, 05:03:26 PM »
Thanks for the advice, sir. I'll cycle through this oil, and I'll see what direction I head into from there.

Offline CycleRanger

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Re: CB750 in Austin
« Reply #16 on: November 10, 2012, 05:03:52 PM »
The old shoes and springs for them are in great condition if anyone needs them.  They shoes actually look new besides all the dust that has accumulated on them. 
Thanks for looking!
Those shoes may look good but they're probably 35+ years old and likely petrified!
Good that you are replacing them.  :)
Great pix!
Do you have a copy of the Honda Shop Manual or Parts List for your bike? Get one here:
https://www.honda4fun.com/materiale/documentazione-tecnica
CB750K5        '79 XL250s     CL350K3
CB750K3        '76 XS650      '76 CJ360T

Offline eelliiss

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Re: CB750 in Austin
« Reply #17 on: November 10, 2012, 05:15:48 PM »
Yeah, I'm really curious as to how old they are. The bike was at a shop before I purchased her getting into shape as I don't think she ran. There is literally just as much padding on the shoe as my new ones. Also, the rear bearing retainer had fresh looking mars on it from what appears to be a makeshift removal possibly. I am indeed glad that I'm replacing. I think money spent on braking is always money well spent.

Offline eelliiss

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Re: CB750 in Austin
« Reply #18 on: November 12, 2012, 05:15:59 PM »
Small, maddening hiccup in re-lacing the front wheel.  I assembled and disassembled three times yesterday.  I thought I finally had it, but then upon inspection this morning, laces on the right side were one back too far.  I went ahead and re-laced the real wheel with no problems.  It took about 15 minutes.  I think brought the wheels to Flash to meet a friend (bicycle mechanic) meet up with me.  They also had a CB750 there as well, so I could have a an exact wheel as a 3D model to aid me.  We tried the exact same pattern with multiple shifts over one or back one when lacing through the hub.  No go.  I think the spokes are too long.  I distinctly remember someone receiving the wrong length in one of the build threads from CB750Supply or VintageCB750. 

Does anyone have any recommendations?  Will anyone locally cut them and rethread them?  They are already powdercoated, so I want to salvage them.  Ooor, who would be the best person to drop them off to in order to give me a definitive answer on whether or not they are the correct length?

HALP!

Offline eelliiss

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Re: CB750 in Austin
« Reply #19 on: November 13, 2012, 07:03:22 AM »
Pic of the rear wheel re-laced with tire mounted:


Offline eelliiss

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Re: CB750 in Austin
« Reply #20 on: November 15, 2012, 10:25:04 AM »
Tank repainted and both wheels finally done:


Offline eelliiss

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Re: CB750 in Austin
« Reply #21 on: November 21, 2012, 06:53:53 AM »
Spent about 6 hours sanding Monday and Tuesday.  I used Mother's for the polish.  Results weren't too bad.


Offline eelliiss

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Re: CB750 in Austin
« Reply #22 on: November 26, 2012, 02:34:49 PM »
I was debating on pulling the trigger on some tank decals from this spot:  http://knkcycles.com/honda-cb750-decals.htm. 

I don't really want to paint the center black for my specific year, so I am thinking of going with the earlier stripes.  Thoughts?  Wondering if the gold will be too much of a contrast for all the black I have on the bike.

Offline lone*X

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Re: CB750 in Austin
« Reply #23 on: November 26, 2012, 06:40:21 PM »
I always like black/gold myself.  Great combo.  You have a nice build thread going here.   And great photos.   Why don't you post it to the Projects forum so more members will see it and pipe in.  Not as many folks check the New Members Introductions as do the Tech and Projects forums.  You will get a lot more responses as that is where most of the technical stuff gets discussed. 
Lone*X  ( Don )

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Several others have come and gone but whose keeping track.
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Offline eelliiss

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Re: CB750 in Austin
« Reply #24 on: November 26, 2012, 06:48:34 PM »
Meh, I might transfer all the pics there. Tomorrow, possibly.