Author Topic: CR750 replica for the street  (Read 75308 times)

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Offline RegDeg

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Re: CR750 replica for the street
« Reply #50 on: November 26, 2011, 01:16:31 AM »
Oups, photos weren't posted?
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Original CB450 K5 and its racer
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Offline RegDeg

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Re: CR750 replica for the street
« Reply #51 on: November 26, 2011, 01:19:26 AM »
Another
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Original CB450 K5 and its racer
Dream 50
SS50E and Z
BMW R69S
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Royal Enfield 700 Interceptor
CR 750 cafe-racer from 60's (project)

Offline RegDeg

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Re: CR750 replica for the street
« Reply #52 on: November 26, 2011, 01:30:13 AM »
Some photos of the final buildup
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Original CB450 K5 and its racer
Dream 50
SS50E and Z
BMW R69S
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CR 750 cafe-racer from 60's (project)

Offline RegDeg

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Re: CR750 replica for the street
« Reply #53 on: November 26, 2011, 01:36:53 AM »
Next
degrave-motocycles.com
Original CB450 K5 and its racer
Dream 50
SS50E and Z
BMW R69S
Ducati 888 SP4
Royal Enfield 700 Interceptor
CR 750 cafe-racer from 60's (project)

Offline RegDeg

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Re: CR750 replica for the street
« Reply #54 on: November 26, 2011, 01:41:41 AM »
And here is a video of the CR750 from a classic race between 2 villages in Alsace, France:
http://www.youtube.com/user/REGDEG888#p/u/7/w9OzpuYMn4A
degrave-motocycles.com
Original CB450 K5 and its racer
Dream 50
SS50E and Z
BMW R69S
Ducati 888 SP4
Royal Enfield 700 Interceptor
CR 750 cafe-racer from 60's (project)

Offline jaguar

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Re: CR750 replica for the street
« Reply #55 on: November 30, 2011, 08:36:37 AM »
One good looking bike you are building there

Offline Falken

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Re: CR750 replica for the street
« Reply #56 on: January 29, 2012, 09:39:46 AM »
No post in a couple months.

Is there a final photo spread that i'm not aware of? 
hope all is well...i really enjoyed your build!  its got me thinking about full fairings :)
K7 CB750F CafeBrat - project underway

Offline bikerbart

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Re: CR750 replica for the street
« Reply #57 on: January 29, 2012, 09:44:22 AM »
Drooool.
its better to regret something you have done,than something you havent.Except playing with explosives.

Offline Stev-o

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Re: CR750 replica for the street
« Reply #58 on: January 29, 2012, 11:04:13 AM »
Just ran across this, what a great project. impatiently waiting for an update.
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline tweakin

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Re: CR750 replica for the street
« Reply #59 on: January 29, 2012, 03:49:08 PM »
absolutely love it!

Offline jaguar

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Re: CR750 replica for the street
« Reply #60 on: January 30, 2012, 06:23:37 AM »
any news?

Offline Vincent

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Re: CR750 replica for the street
« Reply #61 on: January 30, 2012, 12:00:11 PM »
Hey, thanks for your interest. Sorry to report there's been no progress since my last posts. I've been trying to heal the wounds that I inflicted on my bank account, and then I had to do some things on my '77 GL1000  (stock original) and '70 Bonneville (restored to near-stock). But I plan on pulling the engine from the 750 in the next couple of weeks, so I'll be back here with disassembly pictures and requests for advice. I have to say, looking through some of the builds here in the forums is both inspiring and intimidating. People have pursued varied personal visions, discovered unique methods, and used a high level of craftsmanship. I hope I can measure up.

Offline RickB

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Re: CR750 replica for the street
« Reply #62 on: January 30, 2012, 06:21:12 PM »
Vincent, your build is an inspiration to be so don't worry about measuring up, you're already there! Keep it up and update us all when you can.

Offline michiganmike

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Re: CR750 replica for the street
« Reply #63 on: January 30, 2012, 06:45:06 PM »
Man........ya gotta wonder just how many thousands of those double butt seats must have been sold in the '60's.

Oh yeah,   here's a link for CR750's http://www.airtech-streamlining.com/hondaz/CR7501969-77SINCAM.htm
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Offline Vincent

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Re: CR750 replica for the street
« Reply #64 on: June 29, 2012, 10:14:11 PM »


Seems like a lot of posts begin with "It's been a while, but I finally have some progress to report." So here's mine.

It's been a while, but I finally have some progress to report. After I got the bike back from Takashi, who did really beautiful fabrication of mounts for the fairing, instruments, steering damper and a bunch of other stuff, I put it up on my lift and........stared at it. For months. Lights on, lights off. Lift up, lift down. Friends would come over to see it, and I'd roll it out of the garage so we could sit on it, walk around it, inspect it, and talk about it. Endlessly. They'd say "So when are you going to start taking it apart?" And I'd say "Pretty soon. First I just have to blah blah blah (insert any of several lame excuses offered up by someone afraid to commit to a big, complicated job) and then I'll pull the engine out." It just looked so cool the way it was. Since I first decided I had to have one of these, this was the closest I had come to my dream, and the idea of pulling it all apart totally intimidated me. What if I didn't have the skills to do a good job? What if I could never put it back together and it would be just a bunch of parts in boxes on the floor? What if I finished it and it wasn't fun to ride? I started thinking of a Kevin Cameron article I read years ago called "Finishing Fear", and decided to stop cheating myself out of finding out if the bike might just turn out to be exactly what I hoped it would be.

Unusable, but all in one piece.



Nothing in common. Except that I like them all the same.



It begins.



Showing up at the hospital.



Just relax. This won't hurt a bit.



There. Isn't that better?



The engine came apart pretty easily. I had to chisel out a couple of screws, but the cylinder studs came out in one piece using the double-nut-and-vice-grip method. The insides look good. Gear teeth still have the correct profile, journals are good, and shift forks are only slightly worn and well within the limits of acceptable wear. When I bought the bike, it didn't have a working speedometer, so I don't know what kind of mileage it had, but it seems to have had a relatively easy life. Luckily for me. My box of new OEM parts includes bearings, seals, chains, and tensioners and guides.

The oil was pretty dark, but the only things floating around in the pan were little pieces of the cam chain tensioner.



I swear I've seen this face before. Looks like a Mesoamerican artist's rendition of a crocodile.



So that's where the project stands right now. I brought the frame back to Takashi so he can weld some things that he couldn't reach when the engine was in the frame. I brought the crank, pistons, head, and barrels up to APE Raceparts so they can bore it out to 836, balance the crank, polish the journals, fit new rod bearings and nuts and bolts, shot-peen the rods, and install new valve guides, valves, seals, and springs.

I've overcome, for now, my finishing fear.


Offline Terry in Australia

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Re: CR750 replica for the street
« Reply #65 on: June 30, 2012, 04:40:01 AM »
You'll be OK mate, building bikes is just like "Fire and movement", you just gotta keep moving forward. Cheers, Terry. ;D
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So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

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Offline FunJimmy

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Re: CR750 replica for the street
« Reply #66 on: June 30, 2012, 09:34:12 AM »
My dream build too.

Nice work.
FJ
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Offline lordmoonpie

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Re: CR750 replica for the street
« Reply #67 on: June 30, 2012, 11:45:56 AM »
Looking great Vincent and what lovely megaphones - the right curvature and proper rolled lip on the reverse cone, man they are sweet  ;D  ;D  ;D

I just wanted to echo what Terry said on page one and a half - you don't need to earn a fortune to build an amazing bike if you sacrifice things. My bike cost me more than I care to admit to the Wife but I got there over 8 years and counting (still improving bits even now) and sold stuff that wasn't as important to me to fund the nice things like that rear brake. You have a great build going there, keep going and keep it a priority. Good luck!  ;)
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Offline Vincent

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Re: CR750 replica for the street
« Reply #68 on: June 30, 2012, 06:20:29 PM »

Lord Moonpie-

The pipes are indeed lovely, and if you look back in your records you'll see that I bought them from none other than Your Lordship Himself in an eBay auction a couple of years ago. I also got a chin pad from you, though I'll sheepishly admit that my chin will most likely never actually touch the pad. The next things I'll be getting from you are the fuel tank wings and fairing flashes. Another thing about the pipes: the mounts for them were fabricated by Kiyo at Garage Company here in LA, and I'll post a not-very-good picture of the left side mounts. Kiyo first welded a piece of steel plate onto each megaphone to act as a base for the mount, and then made mounts with stiffening ribs on their edges. When you look at the megaphones, it looks at first as though there is one mount on each side that holds both pipes. In fact, the stiffening rib on the upper mount mostly hides the lower mount from view, because the lower one is nesting inside the upper one like a set of spoons. Neat trick.


Offline Tews19

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Re: CR750 replica for the street
« Reply #69 on: June 30, 2012, 06:36:18 PM »
Awesome build! Makes me want to start that look! Love it
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Offline Vincent

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Re: CR750 replica for the street
« Reply #70 on: August 08, 2012, 10:52:29 PM »

Got my engine parts back from APE. New guides, valves, springs, and seals. Cylinders bored for 836 pistons. Crank balanced and fitted with new rods and bearings. I had hoped to reuse the original rods, but they really recommended going with their Super Rods. I dealt with Dustin and Pat, and I think they're good guys. When I went to pick up the parts, Pat took the time to talk with me about my engine, and CB750 engines in general. And I have to say it was gratifying to see Pat's CB750F parked next to the office. When you bring them your old-tech, 39-year-old engines, they're not snickering behind your back. Because they have them too.





Next, I have to pick up some Plastigauge and start figuring out which bearings to buy.

Offline SOHC4 Cafe Racer Fan

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Re: CR750 replica for the street
« Reply #71 on: August 08, 2012, 11:03:17 PM »
I spoke to Pat the other day about my next CB750 project engine.  I cannot wait to take it to APE.
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Offline FunJimmy

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Re: CR750 replica for the street
« Reply #72 on: August 09, 2012, 06:59:15 AM »
Fantastic CR build Vincent.
This would be my dream project too, and maybe some day I'll be following your lead.

Cheers
FJ
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Offline PrsCustom22j

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Re: CR750 replica for the street
« Reply #73 on: August 09, 2012, 07:56:34 AM »
that tank rocks man.  keep posting those photos   :)
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Offline Vincent

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Re: CR750 replica for the street
« Reply #74 on: September 19, 2012, 12:00:04 AM »

Finally, another step in the seemingly endless process! I prepped my frame and the various brackets and mounts, and hauled them to the powdercoater. Also, yesterday I picked up a parts order from Honda. Crank bearings, rear wheel cush rubbers, and some O-rings. I'm waiting for my friend Mike to change the medium in his blaster to glass bead, and then I'll blast the cases and assemble the engine. I had been entertaining the idea of finishing the bike by the end of summer. Ha! Another deadline goes by. But on the bright side, I'm just about done buying parts. Pretty much the only things left to buy are nuts and bolts, wire and connectors, and paint. I think.