Author Topic: Re: 69' Honda cb750 cafe racer almost done pics of mock up (Read 12735 times)

westhewelder · « **Reply #25 on:** July 14, 2012, 01:02:07 PM »

just the jets that came with the carbs, and honestly the exhaust came with the bike ive never really looked into it. hmm guess i should check that to see if i can replace the baffles

westhewelder · « **Reply #26 on:** July 31, 2012, 01:23:21 AM »

So I've torn into the wiring harness checked every wire to make sure they are good. I need help here, I notice there are 3 wires for brown from the ignition to the tail light but I don't know the 3rd

Also no where on the print does it show a brown with blue wire coming from the clutch side control, but there is a component with a button with a brown with blue wire and a grey wire.

next i went with a new color its much darker then the picture.

thanks for any time or help you guys can give me

Terry in Australia · « **Reply #27 on:** July 31, 2012, 01:44:56 AM »

What's that switch off mate? It's not a standard CB750 item, but it looks like a Honda switch from the era, maybe off a different 1970's model. Cheers, Terry.

westhewelder · « **Reply #28 on:** July 31, 2012, 02:04:39 AM »

Your guess is as good as mine, I got this thing in a farmers field 3 years ago. I'm trying to work with what I've got but with all the wiring by the book I get a tail light and neutral light everything else is a no go.

Terry in Australia · « **Reply #29 on:** July 31, 2012, 03:21:25 AM »

Yeah, I feel for you mate, I'm about to "right the wrongs" of a PO's electronic butchery on a CB750 I'm doing for a friend. The PO completely rewired it, made his own harness, basically just bastardised the whole thing. I got the current owner to buy a new harness from that shop I posted a link to previously, but I still have to change out the switchblocks for correct CB750 items, replace the short harness from the alternator, replace the wiring from the headlight, tail light, gauge lights, idiot lights, brake lights, etc etc. I really don't want to do it, but he's a good bloke, and I want his bike to be reliable. Cheers, Terry.

westhewelder · « **Reply #30 on:** July 31, 2012, 10:28:08 AM »

Ya, it's getting kinda rediculous. I have a few suspicions that the components up front are the issue.

westhewelder · « **Reply #31 on:** August 01, 2012, 10:27:04 PM »

ok also i seem to have a shopping list of tutorials and parts now...

-cotter pins for the carbs i need a size or substitute
-gear ratio for the speedometer
-how to rebuild the brake side handle bar switch
-and what brown is wired to besides the tail light and ignition switch

westhewelder · « **Reply #32 on:** August 02, 2012, 06:45:27 PM »

Rebuilt the starter switch, the plastic portion of the headlight switch was broken so I had to Kerry rig it by drilling into it a putting in a small screw to replace the plastic guide pin the switch uses and re installed the contact point for the electric start button hopefully this solves a problem or two..

Terry in Australia · « **Reply #33 on:** August 03, 2012, 03:02:09 AM »

Geez you're obviously on a really tight budget mate, but well done. Cheers, Terry.

westhewelder · « **Reply #34 on:** August 03, 2012, 08:47:08 AM »

A the budget thing is more work with what I've got kinda thing. Why spend money when I can make or fix something. I'm 22 I don't wanna be part of that "throw away" generation.

I have to order a master cylinder rebuild kit, and make a few mounting plates for new components like the speedometer and the rectifier replacing the ok components. I didn't want to cut up the triple tree because I don't want to destroy any original parts. Oh and when me and the girlfriend were removing the paint on the side covers we saw a rainbow of colors blue,green,orange,sparkly blue,red and black twice. Apparently the previous owner felt the color needed to change every year.

cabrala · « **Reply #35 on:** August 03, 2012, 08:53:15 PM »

Quote from: lucky on June 26, 2012, 05:15:28 AM

Good job!!
You got the best carbs Honda ever made for the CB750 as far as I am concerned.
BTW... What kind of exhaust system do you have and what is the jetting??
Idle jet and main jet size?

Lucky, serious question...are those carbs the same "type" (28's?) you posted an EBay link to? The $1,800 ones

westhewelder · « **Reply #36 on:** August 03, 2012, 11:23:45 PM »

Oh wow those do look the same ill have to check! Also I have some progress updates put a smaller tail light and will be making a license plate mount based off the existing holes, also made an aluminum plate for all the wiring to mount to. I'll probably go with a brushed aluminum look. Also cleaned up the wiring harness.

westhewelder · « **Reply #37 on:** August 04, 2012, 04:07:04 AM »

Hmm doesn't seem to have the 28 on the caps anywhere

westhewelder · « **Reply #38 on:** August 04, 2012, 09:45:22 AM »

Finished up some wiring, being redone from the ground up. Need to build some mounts for the new tail light, and license plate and plate light

westhewelder · « **Reply #39 on:** August 18, 2012, 02:39:00 PM »

Ok some more work and changes have been done bobbed the rear fender a few inches.

Rebuilt the master cylinder a bled the brakes. I'm using a front caliper from an 80's dohc.

I was asked earlier about the pipes and they are drag piped but no make or marks I can see

Some components with a new mounting plate made of aluminum. Will probably get a good polish later on time

Next big thing is to design a chain guard probably from stainless then polished.

westhewelder · « **Reply #40 on:** August 18, 2012, 03:38:08 PM »

Mocked up and almost done. White paint the rims white. Stainless steel chain guard drilled out. Looks like on need the headlight fairing and some type of detail or artwork.

lucky · « **Reply #41 on:** August 18, 2012, 04:41:20 PM »

You are doing a great job!!!

You saved that bike from being scrapped out.
Those carbs are like gold as far as I am concerned.
Very easy to work on .
Every adjustment easy to reach. Fully adjustable.
Flip up/down choke.
No lifter arms ,bearings,shafts, etc.,.

westhewelder · « **Reply #42 on:** August 18, 2012, 04:53:13 PM »

Yeah now if only I could find the cotter pins for them! Thank you by the way, that means a lot to me hearing i did a good job on something especially a project like the for a 22 year old is one of the bigger things I've done in life so far.

MotorLeague · « **Reply #43 on:** August 23, 2012, 06:12:43 AM »

Hey great work, bikes coming along nice. Any idea who makes those air filters youre using? I tried to read the name on the cage but coudlnt make it out.

Thanks.

westhewelder · « **Reply #44 on:** August 23, 2012, 02:14:08 PM »

I'll probably find out later on, I work for another 6 1/2 hours. If it helps at all I've seen them on a few spitfire triumphs.

Toxic · « **Reply #45 on:** August 24, 2012, 03:37:41 AM »

Great to see a young man taking an interest in these old bikes, gives me hope for the future. lol

Great job, I like the budget approach, you will learn allot more this way. Anyone can buy brand new everything and bolt it on.

CB_Jeff · « **Reply #46 on:** May 31, 2013, 03:33:03 AM »

Old thread, I know, but I was hoping to figure out the manufacturer on the 4 into 1 cage type air filter, I have seen them on another 750 build... they look cool for what that is worth.

Terry in Australia · « **Reply #47 on:** May 31, 2013, 03:40:06 AM »

There's actually two air filters there mate, they used to be a pretty common accessory for CB750's, you'll probably find a pair on ebay, but iff the rubbers have gone hard, you'll have a bugger of a time getting them on your carbs. Also, the foam filter media will probably crumble into dust, so you'll need to replace them too. Cheers, Terry.

CB_Jeff · « **Reply #48 on:** May 31, 2013, 04:29:25 AM »

Thanks Terry.
Any idea who made them?

Terry in Australia · « **Reply #49 on:** May 31, 2013, 07:47:18 PM »

I'm not sure mate, I have a feeling that they're still made, but don't know for sure? Cheers, Terry.

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Author Topic: Re: 69' Honda cb750 cafe racer almost done pics of mock up (Read 12735 times)