Author Topic: CR750 replica for the street  (Read 75302 times)

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Online PeWe

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Re: CR750 replica for the street
« Reply #200 on: April 06, 2018, 03:05:39 AM »
3:rd small instrument? Oil temp?
Have you made the black instrument dashboard?
CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline Godffery

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Re: CR750 replica for the street
« Reply #201 on: April 06, 2018, 09:05:21 AM »
3:rd small instrument? Oil temp?
Have you made the black instrument dashboard?
From the looks of the back, I'd say Oil Pressure...?

Offline dunc

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Re: CR750 replica for the street
« Reply #202 on: April 06, 2018, 10:49:10 AM »
This is going to be cherry. Loving the small fab exercises. Giving me some inspiration for mine!
it's amateur hour somewhere.

Offline Vincent

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Re: CR750 replica for the street
« Reply #203 on: April 06, 2018, 03:03:06 PM »

Godffrey is right about the gauge. Its an old new-in-the-box Smiths gauge I found online. The face is black, so I had the new tach and speedo gauge faces done in black to match. The other new-in-the-box item I found was a set of old aluminum-body Koni shocks, but I'll cover that in another post.

As for the dashboard, man, I wish I could do metal work like that! The dash was created by Takashi Iwamoto of Cascade Cafe Racer Product in Hawthorne, California. He fabricated various other parts, including the fairing mounts, front fender mounts, and the complicated single piece that supports the front of the fairing, the gauges, the mirrors, the horns, and the headlight. He was able to fit all that stuff into a small space and make it so that the pieces didn't crash into each other when the bars are turned. He also has deep knowledge and appreciation of many types of motorcycles.

Vincent

Offline Vincent

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Re: CR750 replica for the street
« Reply #204 on: April 06, 2018, 10:23:04 PM »

I wanted the tail light to be visible from the sides as well as the back, and I wanted to use LEDs. The individual lights didn't look right to me, so I got a piece of textured acrylic.




I assembled the components, welded the pieces together with a syringe filled with methylene chloride, and then sanded and polished the whole thing.



I made aluminum clips to hold the light and fiberglassed some screws into the inside of the tail piece to hold the clips. The light blends in with the shape of the tail.



Vincent

Offline Vincent

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Re: CR750 replica for the street
« Reply #205 on: April 06, 2018, 10:37:13 PM »

The aluminum shocks were brand new in the box, but they wouldn't compress because one of the interior parts disintegrates over time and clogs the orifices. I ordered a rebuilding kit and shock oil from Ikon, took the shocks apart, and replaced various plastic and rubber parts. I bead blasted the aluminum parts and gave them a clear coat, got springs from Revival in Austin Texas and had them powder coated, and put everything back together.


Offline 02z06dave

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Re: CR750 replica for the street
« Reply #206 on: April 07, 2018, 05:18:03 AM »
Really excellent job. I cant wait to see the rest of it

Offline SOHC4 Cafe Racer Fan

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Re: CR750 replica for the street
« Reply #207 on: April 07, 2018, 07:29:01 AM »
Some amazing work. That taillight looks superb.
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 Terry in Australia

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Re: CR750 replica for the street
« Reply #208 on: April 07, 2018, 03:04:38 PM »
Great job on the shock rebuild mate, what did you use to pull them apart? I've got a pair here I'd like to rebuild too. ;D
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline Vincent

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Re: CR750 replica for the street
« Reply #209 on: April 08, 2018, 07:15:01 AM »

Hi Terry,

The tool is an adjustable gland nut wrench: OTC part # 7463.

Vincent

Offline Terry in Australia

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Re: CR750 replica for the street
« Reply #210 on: April 09, 2018, 01:50:46 AM »

Hi Terry,

The tool is an adjustable gland nut wrench: OTC part # 7463.

Vincent

Thanks mate, that looks great! ;D
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline Vincent

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Re: CR750 replica for the street
« Reply #211 on: April 14, 2018, 10:46:15 PM »
OK, a couple more things. This was a mockup of a possible shift linkage, but I really didn't like the bend.



This is what I ended up with.



Since everything on the bike is new, I wanted to have instruments that were appropriate. It took them both apart, used a syringe filled with acetone to kind of blast the old lubricant off all the pieces, filled the little cups with fresh silicone lube, painted the needles, installed new faces and started the odometer back at zero. You can learn how to do anything on the internet!







Thanks for looking.

Vincent

Offline Terry in Australia

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Re: CR750 replica for the street
« Reply #212 on: April 15, 2018, 02:22:12 AM »
As always, beautiful work mate! ;D
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline Vincent

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Re: CR750 replica for the street
« Reply #213 on: April 15, 2018, 10:40:20 PM »

A few more pics. Weld was added to the front and back of the kickstand, and then I filed it off until the stand sat in the right place: High and inside when retracted, and at a stable angle when deployed.



Painted the oil tank and catch tank with satin epoxy paint.



The catch tank has a bridge on top that holds wires for the tail light and the Motogadget M-Lock keyless ignition. I didn't want the clutter of a key switch, and thought the M-Lock was really neat. It sits about 1/4 inch under the fiberglass seat cowl.



I dummied up the oil lines and had them duplicated by Earl's Performance in Lawndale California.



More tomorrow. Time for bed. Thanks for looking.

Vincent

Offline Terry in Australia

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Re: CR750 replica for the street
« Reply #214 on: April 16, 2018, 01:17:36 AM »
Looks great mate, I love those oil lines! ;D
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline SOHC4 Cafe Racer Fan

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Re: CR750 replica for the street
« Reply #215 on: April 16, 2018, 08:43:58 AM »
Clean work, Vincent, as usual.  Where exactly are you placing the m-lock sensor?  You will want to put as less "material" between the sensor and where you place the "key."  A plastic/abs/resin sidecover is not problematic, but metal plates can drown out reception.
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 Vincent

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Re: CR750 replica for the street
« Reply #216 on: April 16, 2018, 09:15:12 AM »

Hi Don,

The M-Lock goes on top of the metal bridge, where the three holes are. Two holes are for the screws that hold it in place, and one is for the wires that power it. The only thing that goes on top of the unit is the fiberglass seat cowl, and I made sure the unit is held high enough that it's within the correct range to be activated by the key fob. I'm at work now (shhhhh!), but I'll take a picture of the setup when I'm home.

Vincent


Offline slikwilli420

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Re: CR750 replica for the street
« Reply #217 on: April 16, 2018, 11:57:33 AM »
This is looking really killer, but can you please go back and change the broken photobucket links to something that works?
All you gotta do is do what you gotta do.

Vintage Speed Parts Mashup: http://forums.sohc4.net/index.php?topic=133638.0
Rickman CR Parts Kit Refresh: http://forums.sohc4.net/index.php/topic,154837.0.html
AHRMA CB750 Racer: http://forums.sohc4.net/index.php/topic,158461.0.html
AHRMA Superbike Heavyweight Racer: http://forums.sohc4.net/index.php/topic,173120.0.html
'76F CB750 Patina Redemption: http://forums.sohc4.net/index.php/topic,174871.0.html

Offline Vincent

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Re: CR750 replica for the street
« Reply #218 on: April 16, 2018, 09:58:48 PM »

Hi, slikwilli,

Here's a tip that PeWe posted to deal with the missing pictures. Give it a try. It actually only takes a couple of seconds, but I guess we each have to do it on our own computers. The last tip worked for me, because I have Firefox.

Vincent




I did the Photobucket fix that started to work after I had installed 2 of each.
I had to install Chrome Photobucket Embedded Image Fix too

Link in this thread refer to  photobucket embed fix
Yes, I see the photos at top of this page
Both add-ons:
https://chrome.google.com/webstore/search/photobucket%20embed%20fix?hl=sv

Firefox
This only did not help my computer
https://addons.mozilla.org/en-US/firefox/addon/photobucket-embedded-fix/?src=search

This did it
https://addons.mozilla.org/en-US/firefox/addon/photobucket-fixer/

Offline Vincent

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Re: CR750 replica for the street
« Reply #219 on: April 16, 2018, 10:56:04 PM »

Hi calj737,

Big hands, but small homemade tools. Here's what the bridge looks like with the M-Lock installed.



I found longer screws for the unit, cut off the heads to create studs, and double-nutted them to screw them into the bottom of the unit. Took off the nuts, fed the wires into the center hole, turned the tank upside down and inserted the studs into the other two holes, and used long tweezers to place a washer, lock washer, and nut on each stud. Then I used a Dremel with a cut-off wheel to make a tiny open-end wrench out of a piece of flat brass sheet from the hobby store. And then it took lots of 1/4 turns to tighten the nuts.(This is why it takes me a million years to get anything done!) The white junction block is for the tail light, which is attached to the seat.

I thought a lot about where a license plate should go, because I like the clean look of the seat and didn't want to distract attention from it. Also, I didn't want it hung off one of the shocks because that looks "chopper" to me. I cut out some aluminum sheet, bent it to match the angle of the back of the oil tank, and attached it to the tank mounting brackets. Painted satin black, it pretty much disappears. I added a short LED strip to the tail light to shine on the plate. You can walk all the way around the bike without seeing the plate, but you can see it if you're about ten feet back.







I made 2x2 stands for the seat, fairing, tank, and fender to hold them while I worked on them.



Not an original idea, I know, but I made a Dexter-themed spray booth and decorated it appropriately.





The seat before sanding and polishing.



Gas tank at the same stage.



More tomorrow. Thanks for looking, and thanks for the kind words.

Vincent

Offline slikwilli420

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Re: CR750 replica for the street
« Reply #220 on: April 17, 2018, 08:17:03 AM »
Photobucket fixed! PeWe's link didnt work for me but a quick Google search got it. Looking very good! Now to go back and start at page 3!
All you gotta do is do what you gotta do.

Vintage Speed Parts Mashup: http://forums.sohc4.net/index.php?topic=133638.0
Rickman CR Parts Kit Refresh: http://forums.sohc4.net/index.php/topic,154837.0.html
AHRMA CB750 Racer: http://forums.sohc4.net/index.php/topic,158461.0.html
AHRMA Superbike Heavyweight Racer: http://forums.sohc4.net/index.php/topic,173120.0.html
'76F CB750 Patina Redemption: http://forums.sohc4.net/index.php/topic,174871.0.html

Offline Terry in Australia

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Re: CR750 replica for the street
« Reply #221 on: April 18, 2018, 12:54:27 AM »
Ha ha, beautiful work as always mate, and I love the Dexter theme! ;D
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline Vincent

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Re: CR750 replica for the street
« Reply #222 on: April 18, 2018, 09:58:22 PM »

A couple of days ago I said something wrong here. A sensible person would just stop posting at night when he's tired, but I'm not that person. I posted pictures of the gas tank and oil tank and said they were taken before sanding and polishing. I should have said they were taken right after shooting the red paint. The paint doesn't get sanded and polished, but the clear that goes on top of it does. The order I followed was primer, paint, clear, sanding, graphics, more clear, and THEN sanding and polishing.

After shooting color and clear on the fairing, I copied the fairing flashes onto masking paper and used it to decide on placement. Then I laid out the flashes, put a tape hinge in the middle, sprayed soapy water on the fairing, peeled off the paper backing a half at a time, and smoothed the flashes down with a squeegee and a microfiber cloth. The laser-cut graphics came from Lord Moonpie, and they're thin, vivid, and easy to work with. It's worth taking your time planning exactly where you want them, because if you try to lift them back up and move them around, they'll stretch out of shape. Once they're on, they're really sharp looking!













More shortly.

Vincent

Offline Vincent

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Re: CR750 replica for the street
« Reply #223 on: April 18, 2018, 10:30:22 PM »

Since I'm running a speedometer, I wanted to contain the cable. Takashi made the fender brackets, and I made a cable guide, drilled and inserted it into the bracket, had it welded in place, filed the weld and did a little body work, and painted the piece.



Also in this pic, you can see the satin charcoal gray paint on the inside of the fairing. I thought that would be a nice contrast with the silver, the red and the black frame and cables.



Kickstand altered and powder coated. Pipes ceramic coated satin black by Engineered Applications in Los Angeles. Pegs and levers are a combination of parts from CBR900RR and CBR600RR.



Here's the polished gas tank, the seat, and the pipes. OK, and a few years of dust on the frame and oil cooler.



The seat was done in Italian leather over memory foam by The Upholstery Zone in Simi Valley, California.



Here's the fender, calipers, and fairing in place. The fork lowers were sandblasted and powder coated clear satin.



Well, that's it for tonight. Again: thanks for looking.

Vincent

Offline Terry in Australia

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Re: CR750 replica for the street
« Reply #224 on: April 19, 2018, 04:22:53 AM »
Beautiful. ;D
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)