Author Topic: 78 750F Chopper/Digger  (Read 77448 times)

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Offline theofam

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Re: 78 750F Chopper/Digger Project
« Reply #50 on: November 19, 2010, 05:02:58 PM »

Offline SOHC Digger

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Re: 78 750F Chopper/Digger Project
« Reply #51 on: November 19, 2010, 05:13:43 PM »
$600?  That's a nice springer, but right now I have other stuff to buy if I had $600.  I have tossed around the springer idea, but that won't be for a while.  I'm trying to get the 78K that I just picked up running smoothly so that I can turn some coin on it and spend more money on this build.

Offline Raef

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Re: 78 750F Chopper/Digger Project
« Reply #52 on: November 19, 2010, 05:28:43 PM »
nice looking project ;D

Offline SOHC Digger

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Re: 78 750F Chopper/Digger Project
« Reply #53 on: November 27, 2010, 08:01:53 PM »
Top end is all buttoned up.  Waiting on a new clutch and then this engine will be ready to run.

I didn't like the octagon oil tank with this one.  I have a different tank coming so we'll see if I like it anymore.

Damn it's getting cold in the old garage.

Offline Zaipai

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Re: 78 750F Chopper/Digger Project
« Reply #54 on: November 27, 2010, 08:26:20 PM »
Nice build. Really looking good so far. I know what you mean about it getting cold. It seems like just last week it was in the 60's here.. ;)

.: Scott :.
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75 CB550F  | 


Offline SOHC Digger

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Re: 78 750F Chopper/Digger Project
« Reply #55 on: December 23, 2010, 03:15:02 PM »
Got my new "Super Clutch Kit" from CycleX along with the clutch nut socket.  Great price for fiber and steel discs and with a lifetime warranty, I think it's a deal!

Offline SOHC Digger

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Re: 78 750F Chopper/Digger Project
« Reply #56 on: May 07, 2011, 04:03:37 PM »
So after a long, cold, snowy Chicago winter, an engine top-end repair for a fellow forum member, fixing up the 78K I had, and a bunch of carb rebuilds, I'm finally getting back to the project at hand.  I mounted the engine in the frame so that I can figure out what other adjustments need to be made around it.  The fuel tank will be fine.  The oil tank has some serious chain clearance issues and will be heavily cut on the left side to work.  I have to take the rear hub and have almost a half inch shaved off where the sprocket mounts to bring the front and rear sprockets in line.  The rear caliper bracket will also need about 1/8" trimmed off.

Stay tuned for more!

Offline SOHC Digger

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Re: 78 750F Chopper/Digger Project
« Reply #57 on: September 13, 2011, 05:27:13 AM »
Wow, it's been a while since I updated this.  Here 's what I've done since May.  First off, I've found out a lot of differences between the 77-78 rear ends and the earlier models.  If you want to run a 78 disc rear wheel in a frame made for a 76 or earlier drum, you need to replace your sprocket carrier and internal spacer with the earlier style, have your left outer spacer and caliper mounting bracket machined down a little, and use the earlier style axle and adjusters.  You will also need to fabricate a mounting anchor for the caliper bracket.  I wanted mine to sit between the frame tubes.  Because of the bleeder position, I also had to use a caliper from the left front.

Offline SOHC Digger

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Re: 78 750F Chopper/Digger Project
« Reply #58 on: September 13, 2011, 10:29:16 PM »
Other progressions include welding on a steering stop, rear master cylinder bracket, oil tank, rear fender, and kickstand.

The oil tank is one I purchased from CycleX with the chain cutaway already in it.

The kickstand was a splurge from Chassis Design company.  It was $160 but it is worth the money.  Internal spring and killer looks.
« Last Edit: September 14, 2011, 10:47:20 PM by SOHC Digger »

Offline dshot59

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Re: 78 750F Chopper/Digger Project
« Reply #59 on: September 16, 2011, 10:09:05 PM »
Nice to see one going chopper instead of the cafe route, I like.
1974 cb 750

Offline SOHC Digger

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Re: 78 750F Chopper/Digger Project
« Reply #60 on: September 27, 2011, 09:09:49 AM »
After a weekend of garage time, I have the bike partially assembled.  Electrical to do, oil lines, fuel lines, and brakes are left.  My goal is to get a few weeks of riding in this fall to see what changes need to be made, make them, and then tear down for painting.

Oh, and the Mac 4 into 1 that I thought I would use has NO ground clearance here.  So, I will be going another route.  I like the CycleX 4 into 1 they are working on, but I haven't heard any updates.

Offline lucky

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Re: 78 750F Chopper/Digger Project
« Reply #61 on: September 29, 2011, 08:32:16 PM »

Nice stance on the bike BTW.  The way the backbone flattens out under the seat makes me believe that's a C&G frame. 

Do you know much about the C&G Frames?  I have tried researching them and found nothing.  I cannot find any identifying marks on the frame.  Is there anything more you can tell me about these?  Thanks.

Of course you did not find anything on the internet about those frames,it was BEFORE the internet.

People just did things. They did not keep logs and blogs and document stuff. To find out about that you would go down to your local coffee shop or bar and get the latest exciting stories about who was doin what.
Now you go in the coffee shop and it is a bunch of shaved heads with their face stuck in a computer. Boooorrrrriiiinnnnggg!!!!!


Remember "CAFE" racer. Duh..... The CAFE was a happening place with bikes and stories and chicks and creative stuff. It was a happening place. A social place.
You do know what socializing is don't you?
« Last Edit: September 29, 2011, 08:37:40 PM by lucky »

Offline lucky

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Re: 78 750F Chopper/Digger Project
« Reply #62 on: September 29, 2011, 08:35:01 PM »
After a weekend of garage time, I have the bike partially assembled.  Electrical to do, oil lines, fuel lines, and brakes are left.  My goal is to get a few weeks of riding in this fall to see what changes need to be made, make them, and then tear down for painting.

Oh, and the Mac 4 into 1 that I thought I would use has NO ground clearance here.  So, I will be going another route.  I like the CycleX 4 into 1 they are working on, but I haven't heard any updates.

Looks like you need the 2 into one times two solution. two pipes on each side or one big pipe on each side. Perfect.
« Last Edit: September 29, 2011, 08:39:52 PM by lucky »

Offline SOHC Digger

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Re: 78 750F Chopper/Digger Project
« Reply #63 on: September 30, 2011, 07:25:40 AM »
Looks like you need the 2 into one times two solution. two pipes on each side or one big pipe on each side. Perfect.

Thanks for the advice, but I am not a big fan of 2 into 1's on inline fours because they don't join companion cylinders.  In order to really reap the benefits of combining exhausts, you would need to combine 1&4 and 2&3. 

It's going to be 4 into 1 or drag pipes for me.

Offline SOHC Digger

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Re: 78 750F Chopper/Digger Project
« Reply #64 on: September 30, 2011, 07:35:45 AM »
... and I've found my frame is definitely an AEE!!!

Thanks to the good people at Hondachopper.com for providing these vintage sales ads!

Offline SOHC Digger

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Re: 78 750F Chopper/Digger Project
« Reply #65 on: October 11, 2011, 01:04:28 AM »
WIRING IS DONE!!!  Actually it wasn't that bad.  The hardest part was getting the seat back on.  Tomorrow I will fill 'er with oil, hook up the fuel lines, and hopefully breath life into a 33 year old engine!

After that all that will be left to do on the bike will be the Stop and Go.  The brakes need to be rebuilt and installed and I need a new chain and some sprockets.

Offline FrankenFrankenstuff

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Re: 78 750F Chopper/Digger Project
« Reply #66 on: November 07, 2011, 09:33:12 AM »
Why for you no to post avatar to this the threading? stat

Offline SOHC Digger

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Re: 78 750F Chopper/Digger Project
« Reply #67 on: November 07, 2011, 09:40:36 AM »
Why for you no to post avatar to this the threading? stat

Speak English, you must.  Translate I cannot.


Offline FrankenFrankenstuff

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Re: 78 750F Chopper/Digger Project
« Reply #68 on: November 07, 2011, 09:45:42 AM »
I wants for to see big big pictures of your bike I must. Avatar is done ;yes? Find pictures I cannot. I go back to bar now. poop


Offline SOHC Digger

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Re: 78 750F Chopper/Digger Project
« Reply #69 on: November 07, 2011, 10:00:04 AM »
I wants for to see big big pictures of your bike I must. Avatar is done ;yes? Find pictures I cannot. I go back to bar now. poop

Understand do I now.  Post will I.  Done it is not quite yet.  Chain and brakes needed still are.

Offline FrankenFrankenstuff

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Re: 78 750F Chopper/Digger Project
« Reply #70 on: November 08, 2011, 03:07:42 AM »
Frick yeah. Great job man.

Offline hapakev

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Re: 78 750F Chopper/Digger Project
« Reply #71 on: November 08, 2011, 03:52:55 PM »
Awesome project, what are you thinking for paint?
Smoking Jack
1978 CB750F(ish)

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Offline FrankenFrankenstuff

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Re: 78 750F Chopper/Digger Project
« Reply #72 on: November 08, 2011, 04:18:57 PM »
I like it "as-is". Paint is such a commitment. Leave it with the 'ridden hard and put away wet' look. Keep everyone guessing who the bada$$ is on the bike. Dont ever let anyone start a conversation with you about "American Chopper"....oh you should paint it like; "did you see that episode of American CHopper with the paint job bla bla bla nub?"
Digger is digger as a digger does. Paint is for choppers and resto guys.
I am so frigging lit off chiati righ now. prob commiting a crime by even communicating on the internets. Any hot girls here? Carry on Digger. I am sorry for the rant. Just dont change a thing or I will show up at your house with bologony for your tank....did that sound gay?

Offline SOHC Digger

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Re: 78 750F Chopper/Digger Project
« Reply #73 on: November 08, 2011, 10:27:42 PM »
Sorry, but it will be getting painted.  I am going to keep everyone in suspense.  You will know when you see it.  No bologna, please.  The last thing that will go on this bike is a killer clear points cover that some drunk who hangs out too much in the SSDB made me.

Offline FrankenFrankenstuff

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Re: 78 750F Chopper/Digger Project
« Reply #74 on: November 09, 2011, 07:03:22 AM »
Dude...Ive got a new one that I would like to see on that bike. Just shoot me your addy. no bologny.