Author Topic: CB750 K4 Build - The Cafe Tracer  (Read 120499 times)

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Offline budman

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CB750 K4 Build
« Reply #200 on: February 11, 2016, 04:42:30 PM »
Here's the thing about this rabbit hole, though:  once the top is off, you're only a few bolts away from being able to put in a new cam chain.

 :)

mystic_1

There's that, but there's ways around it.


Very true, but it's just a few bolts, and then you'd also have the opportunity to plastiguage your crank and rod bearings.

Oh and also replace those pesky seals at the right side crank and final drive shaft.  They're 40ish years old!

Plus you'd be able to clean out the grunge that accumulates below the transmission, that stuff never flushes all the way out of the sump.

AAaaand, inspect/replace your shift forks for smooth shifting.

Really, if you're going to take the motor most of the way apart anyway, why not go all the way?  ;)

mystic_1
I'll just have to see what I end up with.  This is my first CB750 build.  I'll have to turn some wrenches, check it out all out and hopefully make some good decisions.
Bud

1973 CB750K3 Chopper
2021 Indian Scout

Offline budman

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Re: CB750 K4 Build
« Reply #201 on: February 11, 2016, 04:46:02 PM »
My risers arrived so I had to checkout the handlebars.  Seem a tad bit wide.  I'll have to see how the controls fit.  Might end up lopping an inch off of each end.
Bud

1973 CB750K3 Chopper
2021 Indian Scout

Offline budman

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Re: CB750 K4 Build
« Reply #202 on: February 12, 2016, 09:13:48 AM »
Look what arrived today.
Bud

1973 CB750K3 Chopper
2021 Indian Scout

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Re: CB750 K4 Build
« Reply #203 on: February 12, 2016, 03:38:34 PM »
Look what arrived today.

Free or seized?
1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline budman

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Re: CB750 K4 Build
« Reply #204 on: February 12, 2016, 03:56:43 PM »

Look what arrived today.

Free or seized?

Supposed to be free and shift smoothly.  It's still in the back of the truck wrapped in plastic.  I won't be able to get to it until tomorrow.
Bud

1973 CB750K3 Chopper
2021 Indian Scout

Offline budman

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CB750 K4 Build
« Reply #205 on: February 13, 2016, 07:18:55 AM »
Doesn't look to bad really.  Kicks over.  Feels pretty good.  Somebody added an oil pressure gauge.  Only has one bent fin on the cylinder head that I can see.
« Last Edit: February 13, 2016, 07:24:30 AM by budman »
Bud

1973 CB750K3 Chopper
2021 Indian Scout

Offline mrbreeze

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Re: CB750 K4 Build
« Reply #206 on: February 14, 2016, 02:17:39 AM »
I just read this build all the way through....43 pages. Digging the project and your skills (oh...and the pan head too!!). Just like you thinking about the wooden seat....I was thinking about the oil line. It's gotta be a 3/8 NPT in my eyes because the next size down is 1/4 and that's too small diameter. So the 3/8 thread will bite ok with JB for sealer? My plan was to put a female 3/8 on that side and a male 8an on the other. It may be overkill being that there's no pressure on the hose but this way I won't ever have to buy the whole line again.....just the hose only. That's how I did my oil cooler hoses.
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Offline budman

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Re: CB750 K4 Build
« Reply #207 on: February 14, 2016, 07:11:38 AM »
I just read this build all the way through....43 pages. Digging the project and your skills (oh...and the pan head too!!). Just like you thinking about the wooden seat....I was thinking about the oil line. It's gotta be a 3/8 NPT in my eyes because the next size down is 1/4 and that's too small diameter. So the 3/8 thread will bite ok with JB for sealer? My plan was to put a female 3/8 on that side and a male 8an on the other. It may be overkill being that there's no pressure on the hose but this way I won't ever have to buy the whole line again.....just the hose only. That's how I did my oil cooler hoses.

Yep, the JB weld will work just fine to seal the NPT threads.  Just make sure the parts are clean first.  The adapter is the way to go, but you might think about using an elbow instead of the straight adapter.  It looks like with the way your setup is the oil lines might stick out the side of the bike too far.
Something like this:  http://www.mcmaster.com/#50715k184/=114e2m8
Bud

1973 CB750K3 Chopper
2021 Indian Scout

Offline budman

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Re: CB750 K4 Build
« Reply #208 on: February 14, 2016, 03:44:22 PM »
Started the seat pan today.  Made pretty good progress.  Polished the side cover too.  Wanted to see what it would look like.
Bud

1973 CB750K3 Chopper
2021 Indian Scout

Offline mrbreeze

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Re: CB750 K4 Build
« Reply #209 on: February 14, 2016, 09:40:09 PM »
Cover looks good man! I see ya got the Joker brake stay. Me too although it's hard to see with the megaphone mounted.
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Offline budman

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Re: CB750 K4 Build
« Reply #210 on: February 15, 2016, 06:18:27 AM »
Thanks.  It still needs a bit more polishing.  Couldn't spend any more time on it right now.  Got a million things to do.

I'm going to use the JM brake rod too.  Some of their stuff is a little too fancy for me, but I like these parts.
Bud

1973 CB750K3 Chopper
2021 Indian Scout

Offline budman

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Re: CB750 K4 Build
« Reply #211 on: February 15, 2016, 05:30:19 PM »
The headlight came in today.
Bud

1973 CB750K3 Chopper
2021 Indian Scout

Offline Stev-o

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Re: CB750 K4 Build
« Reply #212 on: February 16, 2016, 09:37:33 AM »
Makin good progress, Bud.
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline budman

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Re: CB750 K4 Build
« Reply #213 on: February 20, 2016, 04:14:00 PM »
The seat pan is pretty much done.  Just needs paint, padding and leather.

I'm going to try to get the front wheel installed tomorrow.
Bud

1973 CB750K3 Chopper
2021 Indian Scout

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Re: CB750 K4 Build
« Reply #214 on: February 21, 2016, 06:27:49 PM »
She's a roller!
Bud

1973 CB750K3 Chopper
2021 Indian Scout

Offline Stev-o

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Re: CB750 K4 Build
« Reply #215 on: February 21, 2016, 07:23:51 PM »
WooHoo!
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline budman

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Re: CB750 K4 Build
« Reply #216 on: February 21, 2016, 07:58:01 PM »

WooHoo!

You betcha.  Now that I've gotten this far I'm going to jump over to the engine for a while.  First thing to do is design some brackets and have them cut at work to support the engine so I can put it on my engine stand.
Bud

1973 CB750K3 Chopper
2021 Indian Scout

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Re: CB750 K4 Build
« Reply #217 on: February 21, 2016, 08:32:38 PM »
That sounds like a good first thing to do Bud. I have yet to have my engine out but I know from working on car engines that a stand is the way to go for most of the rebuilding process. I'm doing top end work on mine right now but cut the frame rails for access. I'm working out a project right now (half in my head and the other half gathering parts & materials) to make removing the engine like lifting and pushing a wheelbarrow. Once I put that plan into action I will do like you and make a jig to hang it on an engine stand.
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Offline budman

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Re: CB750 K4 Build
« Reply #218 on: February 22, 2016, 07:50:41 AM »
Sounds interesting.  Let us know what you come up with.

I have access to a plasma cutting table so I can get the brackets to pretty much match the frame.
Bud

1973 CB750K3 Chopper
2021 Indian Scout

Offline budman

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Re: CB750 K4 Build
« Reply #219 on: February 22, 2016, 01:04:59 PM »
I've been working on these tank logos for a long time.  I think I have finally come up with something I like.  Something that says "HONDA", but in a different way.  I'm going to have them made into decals and then clear coat over them once they're on the tank.
Bud

1973 CB750K3 Chopper
2021 Indian Scout

Offline przjohn

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Re: CB750 K4 Build
« Reply #220 on: February 22, 2016, 01:45:41 PM »
She's a roller!

Congrats on the roller!! Always a nice milestone in a build. Looks like your project is coming along very well, keep up the good work.
I like poetry, long walks on the beach, and poking at dead things with a stick.

Offline budman

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Re: CB750 K4 Build
« Reply #221 on: February 22, 2016, 05:13:51 PM »

Congrats on the roller!! Always a nice milestone in a build. Looks like your project is coming along very well, keep up the good work.

Thanks.  Having a blast.  Taking it slow.
Bud

1973 CB750K3 Chopper
2021 Indian Scout

Offline mrbreeze

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Re: CB750 K4 Build
« Reply #222 on: February 22, 2016, 08:03:17 PM »
Taking it slow is the way I prefer. I always crack up on the reality shows where they have to meet a deadline. All the unnecessary stress for all involved. Things really go smoother when you take baby steps on any project.
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Offline budman

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Re: CB750 K4 Build
« Reply #223 on: February 23, 2016, 07:15:30 AM »
There's a lot of reasons for me to take things slowly...finances, time, family, a job, this is my first CB750 build, all the mods I've made and...I'm not as young as I used to be.
Bud

1973 CB750K3 Chopper
2021 Indian Scout

Offline budman

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Re: CB750 K4 Build
« Reply #224 on: February 24, 2016, 12:27:43 PM »
I designed these brackets to bolt up the backing plate on my engine stand.  They should also work as a bench top engine stand by themselves.  Waiting on them to be cut out downstairs.  I'll use some 3/8" sch40 pipe for the spacers so the brackets aren't right up against the engine.
Bud

1973 CB750K3 Chopper
2021 Indian Scout