« previous next »
Pages: [1]   Go Down

Author Topic: My 78 CB750F  (Read 4681 times)

0 Members and 1 Guest are viewing this topic.

Offline Bouncer

  • "Bear Down"
  • Enthusiast
  • **
  • Posts: 144
My 78 CB750F
« on: August 17, 2008, 12:17:50 PM »
In light of my favorite team DA Chicago Bears, I have appropriately named this: Project "Bear Down"

I was actually considering a Bears theme with the bike but have not decided on it just yet. I am steering away from the idea.

I bought the bike a few weeks ago and have already started tearing down. I apologize that I couldn't get pictures from the beginning in full trim, but I couldn't wait to get started. Here is my progress thus far.

I know you guys love pictures so here you go...











« Last Edit: November 19, 2008, 08:06:47 PM by Bouncer »
Logged
New to the game.

1981 CB650C (Finished) Rat Bike

1978 CB750F Project "Bear Down"

martino1972

  • Guest
Re: My 78 CB750F
« Reply #1 on: August 17, 2008, 01:33:33 PM »
yeah,pictures.....pictures.....pictures... :P :P :P :P

what's your plan's.??? engine rebuild,or clean up,does she run??? changing the looks of the bike,or stock and pretty her up..????

the most important part you got going,you know how to post pictures here, ;D ;D ;D
Logged

Offline Bouncer

  • "Bear Down"
  • Enthusiast
  • **
  • Posts: 144
Re: My 78 CB750F
« Reply #2 on: August 17, 2008, 03:23:41 PM »
It runs, pretty well actually. I plan on going through the motor and carbs just to see what they look like.

Planning on a cross between bobber and cafe.

Most of the bike will be sold off.

Tank, seat, side covers, lights, rear shocks, airbox, mater cylinder, chain, controls, headlight support, etc... all being sold to the highest bidder so to speak.   

Realistically the only things i'll be keeping are the rims, forks, frame, motor, brakes, and headlight bucket. 
Logged
New to the game.

1981 CB650C (Finished) Rat Bike

1978 CB750F Project "Bear Down"

Offline Bouncer

  • "Bear Down"
  • Enthusiast
  • **
  • Posts: 144
Re: My 78 CB750F
« Reply #3 on: August 23, 2008, 12:36:24 PM »
More progress made last night. Oil tank/lines, calipers/lines, rear shocks, panhard bar, removed.

3 questions.

What size wrench for the center triple tree bolt?

What is a 4 into 1, minus the muffler worth?

Where to get quality lowering blocks? The chrome NOS ones are pretty sharp.


I have searched but cannot find a site to get nice lowering blocks, I have researched the plus and minus of them so no need to fill me in.  

  
« Last Edit: August 23, 2008, 01:44:10 PM by Bouncer »
Logged
New to the game.

1981 CB650C (Finished) Rat Bike

1978 CB750F Project "Bear Down"

Offline captaincrash80

  • I better build something before I'm no longer considered a
  • Enthusiast
  • **
  • Posts: 234
  • Member #4842
Re: My 78 CB750F
« Reply #4 on: August 25, 2008, 07:40:02 AM »
For the center triple tree bolt I didn't have a wrench big enough, so I wrapped the head with a couple good layers of tape and used a pipe wrench  ;D Just a thought.
Logged

Offline burmashave

  • Forum Immoderator
  • Old Timer
  • ******
  • Posts: 2,876
    • burmashave.net
Re: My 78 CB750F
« Reply #5 on: August 25, 2008, 08:51:39 AM »
You're not keeping the K/Q seat for your bobber? ;-) For what it's worth, I send bobber/chopper builders to the Bike of the Month thread for inspiration. You may want to check it out if you haven't already. Good luck on the build.
Logged
Quote from: SOHC Digger, RIP
'Ere's whatcha do, Guvna', just throw a couple dookie logs in the hearth and bob's your uncle!
'77 CB750k

Offline Bouncer

  • "Bear Down"
  • Enthusiast
  • **
  • Posts: 144
Re: My 78 CB750F
« Reply #6 on: August 26, 2008, 06:45:05 PM »
More disassembly, more oil-dri, more bloody knuckles, more pictures:






The height I will be attempting to achieve:

Logged
New to the game.

1981 CB650C (Finished) Rat Bike

1978 CB750F Project "Bear Down"

Offline Bouncer

  • "Bear Down"
  • Enthusiast
  • **
  • Posts: 144
Re: My 78 CB750F
« Reply #7 on: September 10, 2008, 05:54:34 PM »
Well the bike is completely diassembled and being sanded and prepped for paint.

I finally took a gander at the engine vin.

I have done a search and can't find a SOLID answer. The engine vin starts with CB750E-315...
Does this mean that I have a K motor in my F frame?

I have heard this is an advantage because of the valve wear in the F heads. Any answers will be greatly appreciated

http://hondachopper.com/timeline.html

« Last Edit: September 10, 2008, 05:56:22 PM by Bouncer »
Logged
New to the game.

1981 CB650C (Finished) Rat Bike

1978 CB750F Project "Bear Down"

Offline Flying J

  • Old Timer
  • ******
  • Posts: 3,386
Re: My 78 CB750F
« Reply #8 on: September 10, 2008, 09:08:59 PM »
I dont think thats right. I have 2 f motors and they both have E serial numbers. Unless i have a black 750k in my bike and picked up a black 750 from the junk yard.
Logged

Offline dustyc

  • I don't know why anyone would call me an
  • Expert
  • ****
  • Posts: 1,141
  • 1977 CB750K
Re: My 78 CB750F
« Reply #9 on: September 10, 2008, 09:26:39 PM »
My 78F's engine doesn't have the F before the E, just CB750E-310....
Logged
1977 CB750

Offline Flying J

  • Old Timer
  • ******
  • Posts: 3,386
Re: My 78 CB750F
« Reply #10 on: September 10, 2008, 09:33:58 PM »
here you go sorry to burst your bubble but you have an F.
http://hondachopper.com/modifications.html
Logged

Offline Bouncer

  • "Bear Down"
  • Enthusiast
  • **
  • Posts: 144
Re: My 78 CB750F
« Reply #11 on: September 10, 2008, 10:17:22 PM »
Ok, excellent. Thanks again for the quick response. I am not upset not ecstatic that I have an F3 motor in the bike. It honestly makes no difference to me. The motor runs so I am happy. 
Logged
New to the game.

1981 CB650C (Finished) Rat Bike

1978 CB750F Project "Bear Down"

Offline Flying J

  • Old Timer
  • ******
  • Posts: 3,386
Re: My 78 CB750F
« Reply #12 on: September 11, 2008, 12:30:28 AM »
I love my f motor. it runs great. But i am going to rebuild it this winter due to compression. Are you ready to sell parts. I might be intrested in a few things
Logged

Offline Bouncer

  • "Bear Down"
  • Enthusiast
  • **
  • Posts: 144
Re: My 78 CB750F
« Reply #13 on: September 14, 2008, 09:57:18 AM »
More pictures:

I am using 60 grit sand paper to remove all of the paint. Then I plan on A) Polishing and clearing the frame, or, B) Gloss black and clear.





My bike didn't come with a tool kit. How in the hell does this specialty bolt come off. Not the one under the green cap the one farther down to take the neck off. It looks liuke a washer with 4 square notches left, right, top, and bottom. Is the best way to describe it. 

« Last Edit: September 14, 2008, 09:59:54 AM by Bouncer »
Logged
New to the game.

1981 CB650C (Finished) Rat Bike

1978 CB750F Project "Bear Down"

Offline KB02

  • Take it easy there, Sonny, I'm an
  • Old Timer
  • ******
  • Posts: 3,760
Re: My 78 CB750F
« Reply #14 on: September 15, 2008, 04:39:45 AM »
It uses the same tool that is used to adjust the rear shocks.

Looks kind of like the tool on the bottom right with the red handles:
Logged
1978 CB750K Project
2000 Ducati ST2
...and a pedal bike

Join the AMA today!!

My project thread Part I: K8 Project "Parts Bike"
My project thread Part II: Finishing (yeah, right) touches on Project "Parts Bike"

troppo

  • Guest
Re: My 78 CB750F
« Reply #15 on: September 15, 2008, 04:44:26 AM »
You could always use a punch and hammer  like the rest of do (the many without a toolkit)
Logged

Offline Bouncer

  • "Bear Down"
  • Enthusiast
  • **
  • Posts: 144
Re: My 78 CB750F
« Reply #16 on: September 15, 2008, 05:44:36 PM »
Quote from: troppo on September 15, 2008, 04:44:26 AM
You could always use a punch and hammer  like the rest of do (the many without a toolkit)

Hmm good idea, I was thinking tape and pipe wrench like said earlier, but that sounds just as good.
Logged
New to the game.

1981 CB650C (Finished) Rat Bike

1978 CB750F Project "Bear Down"

Offline Bouncer

  • "Bear Down"
  • Enthusiast
  • **
  • Posts: 144
Re: My 78 CB750F
« Reply #17 on: October 22, 2008, 10:09:15 AM »
More updates. More pictures.

I have had at the frame with the angle grinder with grinding wheel and wire wheel attachment. I got rid of quite a few of the unnecessary brackets.

Check it out:









Mocking up with cardboard-bondo template:

 






Question: Has anyone removed the vin tag? I have contemplated it for paint reasons. However I am not clear as to whether this will kill the resale of the bike, legality issues etc... It is stamped on the frame but and not sure if you need both.

I peeled it back, again, for paint reasons. If it is a bad idea to remove it I will epoxy or glue it back down using a ball peen hammer to shape it back to the frame.



I am moving slow with the project because frankly I want everything done the correct way, and how I want it done.
Logged
New to the game.

1981 CB650C (Finished) Rat Bike

1978 CB750F Project "Bear Down"

Offline dustyc

  • I don't know why anyone would call me an
  • Expert
  • ****
  • Posts: 1,141
  • 1977 CB750K
Re: My 78 CB750F
« Reply #18 on: October 22, 2008, 12:09:12 PM »
I've read about removing the tag here, so I know the info is here somewhere.  I believe I read the rivets are like little nails, so you would just need 2 new rivets.  I'd bet different states have different requirements and I'd bet even the folks at the DMV wouldn't know without looking it up, so you could probably squeak it by.  I recommend keeping it though.  I know it's a turn off to me if it's missing.
Logged
1977 CB750

Offline Bouncer

  • "Bear Down"
  • Enthusiast
  • **
  • Posts: 144
Re: My 78 CB750F
« Reply #19 on: October 25, 2008, 11:53:25 AM »
Thanks for the input Dusty, anyone else about the tag?
Logged
New to the game.

1981 CB650C (Finished) Rat Bike

1978 CB750F Project "Bear Down"

Offline SOHC4 Cafe Racer Fan

  • Speak up, Whipper-Snapper! I'm a
  • Really Old Timer ...
  • *******
  • Posts: 15,731
  • SOHC/4 Member #1235
Re: My 78 CB750F
« Reply #20 on: October 25, 2008, 02:39:30 PM »
Keep your VIN tag.  In California, DMV checks the tag against the stamping on the frame, and also registers the engine case number. 

Most folks mask the VIN tag when they paint or powdercoat the frame.
Logged
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 Bouncer

  • "Bear Down"
  • Enthusiast
  • **
  • Posts: 144
Re: My 78 CB750F
« Reply #21 on: November 19, 2008, 04:52:33 PM »
More updates:

Got the valve cover off:



Deciding if i want to do a complete disassembly or not. Any input appreciated

Guess what I am working on currently?:









Logged
New to the game.

1981 CB650C (Finished) Rat Bike

1978 CB750F Project "Bear Down"

Offline Bouncer

  • "Bear Down"
  • Enthusiast
  • **
  • Posts: 144
Re: My 78 CB750F
« Reply #22 on: November 19, 2008, 11:42:41 PM »
I also tackled the disassembly/removal of the swingarm bearings tonight:







You can see my tool of choice for removal of the bearings in this picture:

Threaded rod with a nut on the very end. It is nice because you can adjust the depth.

It gives you a nice grab against the lip. This combined with a ball peen hammer, torch, and some PB (I swear by this stuff) blaster.

Logged
New to the game.

1981 CB650C (Finished) Rat Bike

1978 CB750F Project "Bear Down"

Offline Bouncer

  • "Bear Down"
  • Enthusiast
  • **
  • Posts: 144
Re: My 78 CB750F
« Reply #23 on: November 23, 2008, 03:17:58 PM »
Got the rear bearings out. Thanks to this:


My makeshift tool







I am still working on the front bearings. I thought the rears were a pain but the front bearings are coming out ALOT slower.
Logged
New to the game.

1981 CB650C (Finished) Rat Bike

1978 CB750F Project "Bear Down"

Offline Bouncer

  • "Bear Down"
  • Enthusiast
  • **
  • Posts: 144
Re: My 78 CB750F
« Reply #24 on: November 24, 2008, 01:34:04 PM »
Got the front bearings out. YAY!

I found out the hard way that some of the write ups seem to be a bit diff. when it comes to comstars compared to normal spoked front wheels.

I beat up the inners of the front wheel but luckily not an area that the bearings sit upon. So that is a plus.









I plan on doing a bit more grinding on the frame of needless tabs and then.....


OFF TO THE POWDER COATER!!!!!!!!! The frame and rims that is,             ..........as soon as funds allow it :'(

Hopefully in the next 14-21 days.   

« Last Edit: November 24, 2008, 04:45:43 PM by Bouncer »
Logged
New to the game.

1981 CB650C (Finished) Rat Bike

1978 CB750F Project "Bear Down"
Pages: [1]   Go Up
« previous next »