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Author Topic: 1978 750F The start of a big project.  (Read 15877 times)

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Offline slikwilli420

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Re: 1978 750F The start of a big project.
« Reply #75 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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Offline Jnel

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Re: 1978 750F The start of a big project.
« Reply #76 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 calj737

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Re: 1978 750F The start of a big project.
« Reply #77 on: May 04, 2017, 03:34:52 AM »
You can use a new piece of A36 or step up to 303/304 (which is what I do). I turn them with 12mmx1.5 pitch and use a stainless nut either end. If you want to get real fancy, weld a nut on the one end, face it, then you have a custom made "bolt"  ;)
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"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 Jnel

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Re: 1978 750F The start of a big project.
« Reply #78 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 #79 on: May 04, 2017, 10:54:30 AM »
I appreciate the  info.

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Offline calj737

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Re: 1978 750F The start of a big project.
« Reply #80 on: May 04, 2017, 11:58:04 AM »
Quote from: Jnel on May 04, 2017, 10:53:36 AM
I could sweep up and keep the place real clean?  😁
Should have been here this past weekend. Pulled the heads off a buddy's nephew's Toyota Tacoma V8. 250k on the motor. Coolant, degreaser, PB Blaster, brake fluid, engine oil, more coolant, and about 15 years of mud, dirt and muck. Cleaned the floor 3 times (pushing truck back and forth) trying to keep it semi-safe to work on (epoxy covered).

All this after I had just swept, vacuumed, degreased and mopped the floor the prior Monday. You come any time, I've got a broom for you!
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"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 Jnel

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Re: 1978 750F The start of a big project.
« Reply #81 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 #82 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 #83 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 calj737

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Re: 1978 750F The start of a big project.
« Reply #84 on: May 20, 2017, 02:02:39 AM »
Similar has been done on the right side of the tank splitting the backbone. The only consideration on your idea is the petcock may need to be moved.
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"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 Jnel

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Re: 1978 750F The start of a big project.
« Reply #85 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 #86 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 #87 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 #88 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 calj737

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Re: 1978 750F The start of a big project.
« Reply #89 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.
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"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 Jnel

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Re: 1978 750F The start of a big project.
« Reply #90 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 calj737

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Re: 1978 750F The start of a big project.
« Reply #91 on: June 13, 2017, 07:21:46 PM »
****BREAKING NEWS****

South Carolina man kills family dog with motorcycle brake

Authorities this evening reported that a Charleston man accidentally killed his beloved pet this evening while working on his motorcycle. Apparently, the dog entered the garage unannounced as the man was blowing high pressure compressed air into a stuck brake caliper. The piston, made of hardened steel, was propelled across the garage, through the Minivan windows, before tragically striking the dog.

The District Attorney is reviewing the case for cause, with the homeowner possibly facing charges of Animal Cruelty, Felony Assault of a Pet, and Malicious Wounding with a Caliper. The motorcycle has been impounded pending the outcome of the charges. PETA and the National Chapter of SPCA have condemned the owner in the strongest of terms.

Film at 11:00.
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"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 Medyo Bastos

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Re: 1978 750F The start of a big project.
« Reply #92 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 #93 on: June 13, 2017, 08:45:11 PM »
Peace through grease,
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"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)

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Offline Jnel

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Re: 1978 750F The start of a big project.
« Reply #94 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 #95 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 #96 on: June 16, 2017, 01:44:09 PM »
That is a very cool bike.
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Offline calj737

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Re: 1978 750F The start of a big project.
« Reply #97 on: June 16, 2017, 02:04:33 PM »
Heat. More heat. And heat it some more. While smoking hot, douse liberally with rust penetrant. Worst case if it breaks, weld a nut to it and turn that one out. 
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"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 Jnel

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Re: 1978 750F The start of a big project.
« Reply #98 on: June 16, 2017, 02:23:38 PM »
Cal you just want to weld everything.

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Offline Jnel

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Re: 1978 750F The start of a big project.
« Reply #99 on: June 16, 2017, 02:24:53 PM »
Im heating and cooling now.  Trying to be patient. 

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