Author Topic: My 1975 cb 750 Build (Read 19240 times)

PPG9944 · « **Reply #50 on:** March 10, 2015, 04:32:03 PM »

This is my first experience welding and it's definitely not easy but i think ill be able to clean this up and make it structurally sound and look decent. I do want to learn how to weld well though.

PPG9944 · « **Reply #51 on:** March 10, 2015, 07:00:26 PM »

This thing is finally starting to take some shape. I think I have to raise the suspension and mount it in the stock position. It's got those lowering blocks installed right now.

Riceman · « **Reply #52 on:** March 15, 2015, 07:40:58 PM »

If you are using an Arc welder,try dragging the rod at a 45º angle till it starts then
straight up for the weld.
every time you stop welding ,tap the tip of the rod on the ground or something hard to break off the flux.
The flux will rap around the filler rod and won't make contact with the metal to start arcing/

PPG9944 · « **Reply #53 on:** March 15, 2015, 07:51:36 PM »

Ah thanks for that. That makes sense. I probably shouldn't have learned how to weld on a tube but i think it'll work. The structural integrity of the hoop should be ok. It's never going to be load bearing really so I think the way i did it will work. Definitely need a lot more practice welding.

Riceman · « **Reply #54 on:** March 15, 2015, 08:09:32 PM »

Also if you have an AC machine,buy the ac rod,makes a big difference.

PPG9944 · « **Reply #55 on:** March 22, 2015, 03:10:12 PM »

Went to Ace to pick up a door hinge. Hacked it all up but I wanted to have a locking seat on hinges.

And I got the fender mounted up for now. Still needs 2 more mounting points to make it real solid but I'm also not sure if I'm feeling it at all so we'll see. Next up will be trying to relocate the electronics tray and to mount the ignition switch.

That dent in the oil tank looks a lot worse in the pictures than it does in pictures too haha

evanphi · « **Reply #56 on:** March 24, 2015, 08:09:10 AM »

I have the Acewell speedo/tach combo unit. It is fantastic.

If you do the magnet mounting point as suggested earlier (which would be very cool!), the starting input diameter is easy, just the usual wheel diameter... but then you need to reduce it by the same ratio of your rear sprocket to front sprocket.

PPG9944 · « **Reply #57 on:** March 24, 2015, 04:51:59 PM »

Quote from: evanphi on March 24, 2015, 08:09:10 AM

I have the Acewell speedo/tach combo unit. It is fantastic.

If you do the magnet mounting point as suggested earlier (which would be very cool!), the starting input diameter is easy, just the usual wheel diameter... but then you need to reduce it by the same ratio of your rear sprocket to front sprocket.

I'm glad that makes it sound like it's a solid investment. I know exactly what I need but I don't to drop all that money all at once. Im trying to space it out a bit.

PPG9944 · « **Reply #58 on:** March 29, 2015, 04:32:24 PM »

Had to get some work done on my Shadow that's actually in riding condition but productive weekend nonetheless.

Some of you have fancy tools, I wind up making what I need.

Metal Brake! Surprised at how well this wound up working.

This is kinda the idea here, I need to find some bolts that can mount flush with the hinge plate and make some sort of plate to mount to the plunger

And I'm tossing this idea around, got this tank bra that's just hanging around. I'm thinking this will be my left side cover and I plan on mounting the ignition switch underneath it in the bottom of the triangle.

PPG9944 · « **Reply #59 on:** March 31, 2015, 07:50:41 PM »

Got some stuff done tonight. Made a little bracket to hook up the seat plunger to the seat pan. Got to practice a little welding. I still suck. Oh well whatever little bracket isn't structural

And this is kinda what I'm thinking as far as placement of the ignition switch. Gotta get it off that big bracket obviously and make it fit somehow but I think it'll work.

PPG9944 · « **Reply #60 on:** April 12, 2015, 05:31:11 PM »

Couple updates.

Helped my buddy work on his bike and he hooked me up with some take offs. The chain is pretty much brand new should be solid.

The original hinges didn't work how I wanted to so I picked up some plain steel door hinge and got it all welded and fitted up. It fits much better now.

Today I got the gap in the rear closed up and I like where the seat is now. There is still a gap where the bend is but I'm thinking I might use that to my advantage and figure out some sort of turn signal hookup there.

It's finally starting to look like a bike again. I need to order some new spokes. The wheels will get taken to get the powdercoat treatment.

I was looking at the the spokes on 4into1.com. They're about 50 ish bucks a set. Seems like a good deal. Has anyone used these? The buchanans are nice but I don't have the budget to drop 125 bucks a set.

PPG9944 · « **Reply #61 on:** April 19, 2015, 02:39:05 PM »

I didnt like where the original foam idea was going so I met a cool guy that does upholstery. He sold me a piece of foam he had lying around and here we are.

Couple progress pics from today

Rough cuts.

More refined.

PPG9944 · « **Reply #62 on:** April 26, 2015, 04:05:49 PM »

Got some progress pics

I was getting pressure points sitting down just the foam, so this was my solution. The seat feels much better.

I dug around the Magna I have as well and pulled out this Regulator/ Rectifier combo. Gonna make it work

Also, I committed to the idea of a removable seat cowl. Went to the store and picked up some fiberglass resin, and some fiberglass mat. On the way back stopped by the dumpster behind the store and wound up finding all this Insulation foam.

So I got home and glued it all together

Progress 1

Progress 2

I'm going to spend a lot of time shaping this freaking thing to how I want it.

I seem to have this thing where I find stuff to do the hard way. Ha oh well. We'll see how this experiment pans out

PPG9944 · « **Reply #63 on:** April 26, 2015, 05:43:17 PM »

Quote from: calj737 on April 26, 2015, 05:40:40 PM

isn't the Magna a DOHC? If so, you might double-check the wiring connections on that R/R.

Yes, the magna is a v4. Im not well versed in electronics. Why wouldn't this one work?

PPG9944 · « **Reply #64 on:** April 26, 2015, 05:54:15 PM »

Quote from: calj737 on April 26, 2015, 05:51:20 PM

it can, but I believe they are wired differently. Just ran through a thread, and I believe it was "Scottly" who was advising on the differences between DOHC and SOHC R/Rs. I scanned the SOHC Bikes, but couldn't recognize the thread. Perhaps he will venture past and advise?

Hmm. Looks like I'm going to have to do some research on the matter then and see what happens haha.

PPG9944 · « **Reply #65 on:** April 30, 2015, 04:56:25 PM »

Hit the cowl with the sander a bit more. I'm liking it but im gonna have to have the top come lower still. I might take out one or 2 of the layers from the bottom since the fiberglass will come up to the bottom of the seat at the back and it will wrap under the seat where it will be mounted somehow. At least that's how I'm seeing it.

PPG9944 · « **Reply #66 on:** May 17, 2015, 08:16:33 PM »

So it's been a while. But progress has been made!

Cut and welded up the battery box to accept a wider AGM battery. Still gotta do some final fitting but I think it'll work.

A shorter, wider battery will then allow me to utilize that space to relocate some electronic components. I'm thinking about making some sort of hinged electronics tray but that is yet to be determined.

Also, picked up my rims from the powdercoater and laced up the front wheel. The rear wheel will get done sometime this week and then I'll have to true these things up.

And front wheel laced!

PPG9944 · « **Reply #67 on:** June 09, 2015, 07:39:01 PM »

Some progress.

Got the wheels assembled and tires mounted. The new rear tire is so damn skinny haha not sure how i feel about it yet. The rear tire that was on this thing was fat as hell. I kinda liked that look so we'll see what happens in the future.

I tossed on the little rear fender. I'm not sure I'm diggin it. Also I think I'm gonna have to drop the front end internally a little bit

SOHC4 Cafe Racer Fan · « **Reply #68 on:** June 09, 2015, 08:28:37 PM »

I kind of like the back tire especially with the semi-nobbies.

New seat? I thought you were going with shaping your own with foam and fiberglass.

PPG9944 · « **Reply #69 on:** June 09, 2015, 08:31:34 PM »

That is the seat that I made and shaped. I'm sure I posted a picture before I got it upholstered. Im still planning on making a removable seat cowl out of fiberglass.

SOHC4 Cafe Racer Fan · « **Reply #70 on:** June 09, 2015, 09:15:50 PM »

Quote from: PPG9944 on June 09, 2015, 08:31:34 PM

That is the seat that I made and shaped. I'm sure I posted a picture before I got it upholstered. Im still planning on making a removable seat cowl out of fiberglass.

Gotcha. It was the cowl I was thinking of.

PPG9944 · « **Reply #71 on:** June 29, 2015, 05:57:55 AM »

Couple of updates here. Figured out how the side bag is going to be mounted and I'm very pleased. All i had to do was use 2 clamps. Cut a strip of aluminum and then cut a few holes and hook up the hardware. This thing can still be used as a tank bra in the future.

Went to the swap meet and got this for a really good price. The super sport oil tank looks a lot better I think with this gas tank. As far is I know this oil tank doesn't have the vent to hook up to the valve cover so I'll have to go get a little breather filter and hook up some hose to that.

Gonna need to refab some mounting points to make this work.

Going to try and get to the fiberglass work this afternoon.

PPG9944 · « **Reply #72 on:** June 29, 2015, 08:25:05 PM »

Fiberglass round 1

PPG9944 · « **Reply #73 on:** July 20, 2015, 12:35:25 PM »

Got a fender off a suzuki gs 550 and mounted it on the front. Still need to massage and grind the fender brackets to line up the fender better but major progress. I've been struggling with ideas for a while.

The fiberglass seat cowl still needs A LOT of body work and sanding. Not something I'm in the mood for right now.

PPG9944 · « **Reply #74 on:** August 01, 2015, 04:48:28 AM »

Motor is back in the frame. Mocked up a few parts. Still plenty of work to do but it's slowly getting there.

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Author Topic: My 1975 cb 750 Build (Read 19240 times)