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Author Topic: 1978 750F The start of a big project.  (Read 16148 times)

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Offline Jnel

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Re: 1978 750F The start of a big project.
« Reply #25 on: February 12, 2017, 11:59:58 AM »
When i get home, I'm going to try the EZ Out approach i guess.  I have a small drill press that i can set up and get a good straight, center bore to remove some material and get ready for the ez out or maybe a re-tap.  No way for me to weld an extension on it.  I soaked it for two days, put the heat to it and still snapped it.

I used a hand Impact wrench on a lot of the parts and with good luck. This one... not so much luck.
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Offline Jnel

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Re: 1978 750F The start of a big project.
« Reply #26 on: February 12, 2017, 12:04:06 PM »
I'm definitely going to use anti-cease on everything  when it goes back together.
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Offline Jnel

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Re: 1978 750F The start of a big project.
« Reply #27 on: February 12, 2017, 01:49:26 PM »
I've had some good luck with bigger sizes. But this little guy is going to be a pain.  I just know it.  I'm feeling drill and tap in my future and hopefully not oversize drill.
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Offline Jnel

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Re: 1978 750F The start of a big project.
« Reply #28 on: February 12, 2017, 04:17:19 PM »
Hey... thats good info.  I have the bits.  I'll rig up the drill press.

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Offline Jnel

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Re: 1978 750F The start of a big project.
« Reply #29 on: February 12, 2017, 05:31:56 PM »
Don't worry if i drag you to charleston, it's going to be for more then a little job like that.
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Offline Jnel

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Re: 1978 750F The start of a big project.
« Reply #30 on: February 20, 2017, 07:40:38 PM »


Worked through some tough grinding and sanding. Went down to metal in 95% of the frame. But... its done. My fingers are killing me.  A labor of love im told.  I had no idea how bad it was.  I promise, i will never sit by and let another bike get that bad.  Know i feel pretty good about its condition. Cleaned off a bunch of tabs, extra metal associated with the center stand, side covers, and wiring.  Much cleaner now.  I almost started to dress up the original factory welds, but passed on that idea.
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Offline Jnel

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Re: 1978 750F The start of a big project.
« Reply #31 on: February 20, 2017, 07:56:56 PM »
I'm going to hold off on cutting the back end.  I'm thinking about using the original plastic cover back there.  I thought it would bring a little bit of the original equipment to the party.  Plus... i think its a good place to tuck a custom brake light in there. Maybe I'm crazy, but you can get a pretty big light in there. The original light can almost fit inside the hump. When it comes to being seen... bigger and brighter is a good feeling for me. So this idea is not finalized yet.  I think an oil tank back there is a possibility as well.


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Offline Jnel

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Re: 1978 750F The start of a big project.
« Reply #32 on: February 20, 2017, 07:59:34 PM »
Frame kit?  What you talking about Willis?
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Offline Jnel

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Re: 1978 750F The start of a big project.
« Reply #33 on: February 20, 2017, 08:06:22 PM »
Oh ... I've seen this.   Very cool.  I thought it was great for race applications.  You think this for me?  Wait... you think im going to be rebuilding?  I think not. But i am going to make sure that timing chain is right befor it goes back in.  Who sells this kit?
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Offline Jnel

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Re: 1978 750F The start of a big project.
« Reply #34 on: February 20, 2017, 08:12:34 PM »
Man... things changed so much !   But i cant tell you how excited i am to learn all of this.  I can't thank you enough.  I'm a sponge these days and it's great to see all of the advacements for these old girls.

Regards from newb. 
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Offline SOHC4 Cafe Racer Fan

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Re: 1978 750F The start of a big project.
« Reply #35 on: February 20, 2017, 08:36:21 PM »
Quote from: Jnel on February 20, 2017, 07:56:56 PM

I recognize that oil tank/seat.  My buddy fabricated it and his wife did the upholstery.
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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
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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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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 #36 on: February 20, 2017, 08:49:09 PM »
750CRF...  thats cool.  Did he ever go into production?   This photo that i grabbed from Pintrest, i believe, is responsible for my motivation on the back end of this project.  I'm a fan of form and function and this is a pretty good job of meeting the needs of both.     Got any contact info on your friend?
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Offline Jnel

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Re: 1978 750F The start of a big project.
« Reply #37 on: February 21, 2017, 06:19:39 AM »
Cal...  do you have any ideas for exhaust. I like the original sound of the 4 into 4.  But now that I'm building a different style of bike and needs to sound a little more threatening.  But not too loud. Performance is important but I want to be able to sneak home too.  What's popular?
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Offline Jnel

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Re: 1978 750F The start of a big project.
« Reply #38 on: February 21, 2017, 06:20:51 AM »
I I like 4 into 2 but only for symmetry. 4 into 1 seems like the choice for a lot of people
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Offline Jnel

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Re: 1978 750F The start of a big project.
« Reply #39 on: February 21, 2017, 07:23:29 AM »
Thanks Cal.  Centet stand is history!
Appreciate your hep man.
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Offline Jnel

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Re: 1978 750F The start of a big project.
« Reply #40 on: February 24, 2017, 07:49:58 AM »
I still can't believe that i did this.  I'm completely responsible.  Its a long sorted story and im sure I'll need therapy as a result. But this 17 years of gunk built up in the carbs and the gas tank is worse.  4 cans of carb cleaner and a lot of brushing.  I'm starting to come down now from the buzz now.  I promise I'll never do this again.



They look better now.  Everything moves pretty smooth.
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Offline Jnel

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Re: 1978 750F The start of a big project.
« Reply #41 on: February 24, 2017, 07:51:27 AM »
I donk think they'll ever look prety again!
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Offline SOHC4 Cafe Racer Fan

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Re: 1978 750F The start of a big project.
« Reply #42 on: February 24, 2017, 08:27:51 AM »
Quote from: Jnel on February 24, 2017, 07:51:27 AM
I donk think they'll ever look prety again!

Send them to Nils (restocycle.com) and they will look better than they did when they were new.
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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 #43 on: March 02, 2017, 03:57:27 PM »
Ant thought on how this would work for a motor or work stand?  Was thinking it would fit on a standard motor stand that I have already.

I'm open to suggestions

Thanks
Jnel
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Offline JoeCooley

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Re: 1978 750F The start of a big project.
« Reply #44 on: March 02, 2017, 04:07:29 PM »
You will have to trim the angle iron down to fit around the output shaft and seal area. The other side may need trimming to not interfere with the clutch cover. Someone on here put a stopper at the top also to allow inverting the engine and removal of the bottom case half.
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Joe in San Diego - Quick Cyles
78 CB750K 836cc Highway Racer - http://forums.sohc4.net/index.php/topic,162264.0.html

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Offline Jnel

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Re: 1978 750F The start of a big project.
« Reply #45 on: March 02, 2017, 04:10:12 PM »
Quote from: JoeCooley on March 02, 2017, 04:07:29 PM
You will have to trim the angle iron down to fit around the output shaft and seal area. The other side may need trimming to not interfere with the clutch cover. Someone on here put a stopper at the top also to allow inverting the engine and removal of the bottom case half.
Yes... fit to work.  My stand rotates 360.  But you thinl this will work? 

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Offline Jnel

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Re: 1978 750F The start of a big project.
« Reply #46 on: March 02, 2017, 04:37:27 PM »
Ok... great!  Its simple.  I can whip this up in no time and get this motor off the small bike lift and on the stand were I can get all around it.   Baby steps.   Thanks for the help and support as always.  And I thought YouTube was the best source if info.   What was I thinking?

Thanks guys
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Offline JoeCooley

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Re: 1978 750F The start of a big project.
« Reply #47 on: March 02, 2017, 10:31:32 PM »
Good luck with the project. I wish I had a stand when I did mine recently.
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Joe in San Diego - Quick Cyles
78 CB750K 836cc Highway Racer - http://forums.sohc4.net/index.php/topic,162264.0.html

Rickman CR750 Restoration (SOLD)

Offline Jnel

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Re: 1978 750F The start of a big project.
« Reply #48 on: March 04, 2017, 11:10:51 AM »


This worked out pretty well.  It's going to make things so much easier.
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Offline Jnel

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Re: 1978 750F The start of a big project.
« Reply #49 on: March 04, 2017, 12:01:34 PM »


You mean.... like this?
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