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Author Topic: 1978 750F The start of a big project.  (Read 16151 times)

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Offline Jnel

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Re: 1978 750F The start of a big project.
« Reply #50 on: March 04, 2017, 12:46:17 PM »
Ok.  Got it. Appreciate the input.  Easy fix.  I don't mind burning up some more wire.  Thanks Cal
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Offline Jnel

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Re: 1978 750F The start of a big project.
« Reply #51 on: March 13, 2017, 09:37:42 PM »





Some photos to let you folks know im doing a little something on this project.  Lots of reaserch time involved.

happy to be here... even if I have no clue whats going on!

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Offline Jnel

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Re: 1978 750F The start of a big project.
« Reply #52 on: March 14, 2017, 02:35:45 PM »
Yes I'm going for the frame kit.  Im just kind of screwing around fitting things and see how they look.  I actually put the tires and rims on too. But i took them off and removed the tires. Im going to pick some new sneekers out shortly.   I wanted to see about seat hight and position of the rear controls and general geometry of me sitting on it.  I don't really know about the rear vontrols and the clip ons.  I dont know how comfortable its going to be.  I sent the rims to my son for blasting and powder coating.  The front shocks are coming back off too.  The uppers are rusted so bad i didn't put the new seals in and no oil in the shocks.  I guess i need to visualize a little bit.   I even put the rusty rear shocks on.  Playing with seat position.  Playing with a design of the oil tank and its position. 

Its likeva puzzle and i kind of enjoy it.

happy to be here... even if I have no clue whats going on!

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Offline Jnel

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Re: 1978 750F The start of a big project.
« Reply #53 on: April 26, 2017, 10:39:39 AM »
Anyone got thoughts on rear spring replacement?  What's popular?  Benefits for longer springs or shorter ones?  My stock size is 13 3/16.

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Offline Jnel

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Re: 1978 750F The start of a big project.
« Reply #54 on: May 03, 2017, 04:41:59 PM »
Anyone have suggestion about the rods that hold the rear of the motor in place?  I'm going the make a bracket that hold the rearsets in place. But these long bolts or rods are too long.  What do builders do?

They're long to accommodate the old very thick plates that held the foot pegs and rear passenger pegs.

  The only thing i can think of is put more threads on there and cut the excess off. Or... have new ones made.

Any thoughts?  They will be appreciated.

John

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Offline SOHC4 Cafe Racer Fan

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Re: 1978 750F The start of a big project.
« Reply #55 on: May 03, 2017, 06:06:19 PM »
Most people either have the bolt shortened and turned with new threads OR source (or make) a new bolt.
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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 Jnel

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Re: 1978 750F The start of a big project.
« Reply #56 on: May 03, 2017, 06:28:50 PM »
Any ideas on the grade of steel?  Hard I would think.  Cut the threads before the Harding process I would guess?  I need a machinist.

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Offline slikwilli420

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Re: 1978 750F The start of a big project.
« Reply #57 on: May 03, 2017, 07:10:49 PM »
It's unhardened mild steel. Nothing fancy. Get a piece of rod the right size and thread both ends.
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All you gotta do is do what you gotta do.

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Offline Jnel

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Re: 1978 750F The start of a big project.
« Reply #58 on: May 03, 2017, 07:15:12 PM »
Thats good news.  I can thread the one i have then.  Then cut it to lenth.  I appreciate the info. 

Thank you Willie!

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Offline Jnel

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Re: 1978 750F The start of a big project.
« Reply #59 on: May 04, 2017, 10:53:36 AM »
Fancy Fancy Cal.  I think threads and nuts on both ends are going to work for me.  You make your own,  thats cool.  I don't have that skill.  I'm going out source this job.   I want to hang around your shop for a week.  I could learn some cool tricks.  I could sweep up and keep the place real clean?  😁

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Offline Jnel

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Re: 1978 750F The start of a big project.
« Reply #60 on: May 04, 2017, 10:54:30 AM »
I appreciate the  info.

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Offline Jnel

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Re: 1978 750F The start of a big project.
« Reply #61 on: May 17, 2017, 03:00:17 PM »
Did a little work on the valve cover and the heads.  Local gun shop had brushes for cleaning the barrels.  Worked great on the end of a drill.

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Offline Jerry Rxman Griffin aka MuthaF'er

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Re: 1978 750F The start of a big project.
« Reply #62 on: May 17, 2017, 03:11:28 PM »
FYI, Chewbacca just posted up re-zinced engine mount bolts for sale.
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As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline Jnel

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Re: 1978 750F The start of a big project.
« Reply #63 on: May 19, 2017, 06:47:02 PM »
Anyone have thoughts about cutting the last 10 inches off of the stock F modle gas tank, then putting interior walls on each piece and weld the tank back together to make an oil tank in the rear portion?

Crazy?  Seems like a good project.   Saves fuel cost at the pump.😃

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Offline Jnel

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Re: 1978 750F The start of a big project.
« Reply #64 on: June 13, 2017, 04:33:49 PM »
I ssem to have an issue removing the piston from my front brake assembles.  The rear came out no problem.  The two  fronts are being stubborn.  Shot some liquid wrench in behind the piston thru the banjo fitting.  Heated it up.  Wont #@%&* budge.

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Offline Jnel

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Re: 1978 750F The start of a big project.
« Reply #65 on: June 13, 2017, 04:45:34 PM »
I've heard about using air pressure.  But my compressor has not got the strength.

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Offline kmb69

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Re: 1978 750F The start of a big project.
« Reply #66 on: June 13, 2017, 05:07:13 PM »
Quote from: Jnel on June 13, 2017, 04:45:34 PM
I've heard about using air pressure.  But my compressor has not got the strength.

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Better be careful if they are that stuck. If they brake loose from compressed air, they can become DEADLY projectiles!!

Use a grease gun to pressure them out and you can better control the removal.
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Offline Jnel

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Re: 1978 750F The start of a big project.
« Reply #67 on: June 13, 2017, 05:45:40 PM »
I'm not in love with the grease idea. But i can take some safety precautions with the air.  Maybe in side a blanket or packing material.

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Offline Jnel

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Re: 1978 750F The start of a big project.
« Reply #68 on: June 13, 2017, 07:11:51 PM »
Ok... I'll give it a try.  Thanks for all the ideas.  Grease it is. But I still like the danger of the high pressure air

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Offline Medyo Bastos

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Re: 1978 750F The start of a big project.
« Reply #69 on: June 13, 2017, 07:37:58 PM »
Quote from: calj737 on June 13, 2017, 07:03:36 PM
Is the master cylinder still attached to the caliper? If so, just use brake fluid and pump them out. If not, the grease gun works a treat and the mess is very minor. You're going to be cleaning up the calipers anyway (stuck piston=cleaning) so the grease is no big deal.

yeah, just scoop the grease and reuse later
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Offline SOHC4 Cafe Racer Fan

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Re: 1978 750F The start of a big project.
« Reply #70 on: June 13, 2017, 08:45:11 PM »
Peace through grease,
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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 Jnel

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Re: 1978 750F The start of a big project.
« Reply #71 on: June 16, 2017, 12:37:28 PM »
Ok... moving right along to the next issue... bleeder for the disk brakes.  That thing is welded in there.   Its going to break for sure.  Anyone got a trick for removal?

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Offline SOHC4 Cafe Racer Fan

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Re: 1978 750F The start of a big project.
« Reply #72 on: June 16, 2017, 01:43:02 PM »
You may need to drill it out.
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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 Vintage King Motor Sports

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Re: 1978 750F The start of a big project.
« Reply #73 on: June 16, 2017, 01:44:09 PM »
That is a very cool bike.
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Offline Jnel

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Re: 1978 750F The start of a big project.
« Reply #74 on: June 16, 2017, 02:23:38 PM »
Cal you just want to weld everything.

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