Author Topic: 1973 cb750k3 built by Bronko37  (Read 1652 times)

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Offline Bronko37

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1973 cb750k3 built by Bronko37
« on: February 03, 2016, 04:48:41 PM »
Hello all. I been conversing with several of you over in the New Members area throughout the day and this place is great. I figured I would jump in here and introduce my self and show yall a lil of what I been workin on. I found this bike on Craigslist on Saturday January 30th at 11:00pm. I called the man at 9:00 am the next day and we spoke a bit on the phone and we quickly figured out that he lives only about 5 miles from me. He has seen me ride my 1976 Honda GL1000 past his house many a time and wondered to himself just wtf kinda bike it was? I have no badging or anything on it and its all hot-rodded out so he couldn't tell. Anyway, I digress...So I show up at his house at 10:30am, hand him the cash, and we start looking the bike over.

He has the whole back story on this bike. The motor looks nice and kicks over freely. Bike has compression but I'm not sure how much yet as I havent had a chance to measure it. Ultimately I am going to take her down to the frame as the PO painted the motor whilst within the frame and now there is god-danged silver paint on everything. There is 37k on the clock but im thinking Im gonna open it up anyway, because I want to, and I enjoy it, and its a super badass hobby right?!

So like I say, Im in the middle of another motor so I am just tinkering with the 750k a lil at work. I teach a machining class at the high school I graduated from so Im in a shop all day long! I couldnt help myself today so I took the gas tank in with me as the paint was just aweful. You can see in the pics how bad it was. Anyway, I got most of the paint off of it today just fiddling around between classes and stuff. I used some stripper and lots of gloves, rags, and a putty knife. It all came away pretty easy. Not bad for what maybe amounted to 40' of work.

Looking forward to getting to know the folks here. Im also a huge fan of Goldwings and my current bikes include a 1984 Honda Goldwing 1200 Aspencade. This is a much sportier bike than a lot of people give it credit for. Under neath all that Tupperware there is the heart of a race horse that loves to run fast and hot! You wont feel like you are ridding a near 800lb machine thats a guarantee. I think of it as more of an early 80s Honda ST1200. I also have the 76 gl1000 as I am sure I will bring up too often. I love this motorcycle. I have owned many bikes but the gl1000 is by far, at this point anyway, the coolest bike I have ever had. It is the machine that taught my how to work on carbs, heads, cooling systems, clutches, and ultimately instill enough confidence to allow me to tear into her soul to replace the piston rings. Hoping to share that kind of emotion with the 750.

Enjoy the pics...
« Last Edit: February 03, 2016, 04:52:42 PM by Bronko37 »

Offline Bronko37

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Re: 1973 cb750k3 built by Bronko37
« Reply #1 on: February 03, 2016, 04:50:53 PM »
More Pics...That fairing and lowers are for sale. Genuine Hannigan faring and lowers! Super cool, just not my bag man...

Here is my 1976.

« Last Edit: February 03, 2016, 04:54:19 PM by Bronko37 »

Offline Stev-o

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Re: 1973 cb750k3 built by Bronko37
« Reply #2 on: February 03, 2016, 05:02:52 PM »
Subscribed.  What is the overall plan for this bike?  I vote 836cc kit!

BTW - The GL front end can be installed on the 750 if you want to do a dual disc upgrade.
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline Bronko37

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Re: 1973 cb750k3 built by Bronko37
« Reply #3 on: February 03, 2016, 05:15:04 PM »
Hey thanks Steve-o. I have heard about that GL upgrade on the front end. I would love to do a big kit like that for myself at some point as well. But alas, I purchased this machine as an investment. My plan is to refurbish all of the main working systems. Engine, carbs, ignition, suspension, brakes, final drive, electric. I am also going to paint the above mentioned and possibly the motor. Ill polish up some covers, swap out some bars, and upgrade the lighting to LED. A simple rear set, cool bars, and a stylish seat will top off the look. I will do 100% of the work on my own. The plan is to flip this bike for any amount of profit while not screwing anyone over. I want someone to be able to drive off on a custom bike that I built as my own, knowing that mechanically the bike is perfect and will be enjoyed. Then Ill buy another one and do it again....Its turned into such a fun hobby, I dont want to be done when I finish my gl. This will be the first bike Ill be able to just do everything on without having to do it in chunks between riding season, because I dont need to ride it. I got me a touring bike and a hot rod. Ill ride it when its done. And ill enjoy it until the right person comes along and buys it. I take a tremendous amount of pride in the work I do, probably too much, but I know the work is as good as it can be on my budget lol

Offline SOHC4 Cafe Racer Fan

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Re: 1973 cb750k3 built by Bronko37
« Reply #4 on: February 04, 2016, 08:01:08 PM »
I checked out your "last run" video.  Nice Wing.
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 70CB750

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Re: 1973 cb750k3 built by Bronko37
« Reply #5 on: February 05, 2016, 04:46:15 AM »
Following.
Prokop
_______________
Pure Gas - find ethanol free gas station near you

I love it when parts come together.

Dorothy - my CB750
CB750K3F - The Red
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CB900C

2006 KLR650

Offline Bronko37

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Re: 1973 cb750k3 built by Bronko37
« Reply #6 on: February 05, 2016, 06:53:53 AM »
Hey thanks a lot guys!

I love that old wing. Hopefully gonna get the motor halves put back together this weekend. Getting into the home stretch on that build.

Offline Bronko37

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Re: 1973 cb750k3 built by Bronko37
« Reply #7 on: February 08, 2016, 09:22:40 AM »
Ok, well the tank is pretty well stripped. Now I need a little body work on it, some more sanding, and then I can at least get it primed up.

Offline calj737

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Re: 1973 cb750k3 built by Bronko37
« Reply #8 on: February 08, 2016, 09:26:26 AM »
Do you all have a Body Shop at that Learning Center? If so, I'd have them do the metal work and prep. Places of particular note for pinholes are the side badge recesses, and underneath where the trim clamps are. Yours looks to be in decent shape notwithstanding the dents at the rear.
'74 550 Build http://forums.sohc4.net/index.php?topic=126401.0
'73 500 Build http://forums.sohc4.net/index.php?topic=132935.0

"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline Bronko37

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Re: 1973 cb750k3 built by Bronko37
« Reply #9 on: February 08, 2016, 09:28:52 AM »
Nope, no body shop here. I was wanting to do my own work on this, gotta learn some time. Is there any tricks for getting that dent out, or should I fill it in and sand it? Its an awful lot to just fill in, but this is all new territory for me. All I know about it is what I learn watching Dino do it...

Offline calj737

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Re: 1973 cb750k3 built by Bronko37
« Reply #10 on: February 08, 2016, 09:34:26 AM »
Don't fill it, pull it. You can use a bent rod and do it the Paintless Dent Removal (PDR) method. Or, weld studs to it, then use a puller. Start on the outer edge and work inwards. You should end up with some high spots afterwards and use a gentle tap hammer to knock them down. Prime, guide coat, sand until its gone. Fill and sand until perfect.

You can watch some YouTubes on PDR to gain some insight and even fashion your own rods. 3/8" steel rod, bent in a bench vise. Grind a tip (not too sharp) so you can locate the dent. Push hard! Access the dent thru the filler cap and just be mindful not to mash the neck.

Some may encourage hot/cold to pop that, but I am dubious to the nature of the dent responding to that technique as its a complex dent. Also, DON'T pressurize the tank to blow it out. This can distort your entire tank. Weld on studs is best bet as you are in bare metal already.
'74 550 Build http://forums.sohc4.net/index.php?topic=126401.0
'73 500 Build http://forums.sohc4.net/index.php?topic=132935.0

"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline Bronko37

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Re: 1973 cb750k3 built by Bronko37
« Reply #11 on: February 09, 2016, 04:17:45 PM »
« Last Edit: February 09, 2016, 07:50:51 PM by Bronko37 »

Offline SOHC4 Cafe Racer Fan

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Re: 1973 cb750k3 built by Bronko37
« Reply #12 on: February 09, 2016, 06:37:56 PM »
Pressurizing the tank to remove a dent is NOT recommended.  It can be dangerous and if the dent is stronger (as a structure) than other portions of the tank, the tank will deform.  If you pressure regulator is defective that can be REALLY bad.
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 70CB750

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Re: 1973 cb750k3 built by Bronko37
« Reply #13 on: February 10, 2016, 03:28:51 AM »
Nope, no body shop here. I was wanting to do my own work on this, gotta learn some time. Is there any tricks for getting that dent out, or should I fill it in and sand it? Its an awful lot to just fill in, but this is all new territory for me. All I know about it is what I learn watching Dino do it...

Well, why dont you find a body shop in town?  Dent pulling with proper tools is fast and easy, without them pain and a chance to kill your tank.

If you want to do it all yourself, Horror Freight carries tools to do it with:

http://www.harborfreight.com/catalogsearch/result?q=dent+puller

I understand, I am a skill collector too  ;D
« Last Edit: February 10, 2016, 03:31:23 AM by 70CB750 »
Prokop
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Pure Gas - find ethanol free gas station near you

I love it when parts come together.

Dorothy - my CB750
CB750K3F - The Red
Sidecar


CB900C

2006 KLR650

Offline Retro Rocket

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Re: 1973 cb750k3 built by Bronko37
« Reply #14 on: February 10, 2016, 04:25:04 AM »
A heat gun / Hair dryer and some cold spray,  like compressed air and that would just about pop right out, there should be some video's on you tube..

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 Bronko37

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Re: 1973 cb750k3 built by Bronko37
« Reply #15 on: June 09, 2016, 03:59:44 PM »
Been awhile since Ive had time to work on it. Ima post a couple updates.

Enjoy.

« Last Edit: June 09, 2016, 04:11:19 PM by Bronko37 »

Offline Bronko37

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Re: 1973 cb750k3 built by Bronko37
« Reply #16 on: June 09, 2016, 04:00:21 PM »