Topic: CB750 K4 Build - The Cafe Tracer

[budman]

Seems when we do these "rebuilds" for a hobby, it takes much longer than anticipated, especially when we have other ridable bikes!

Plus we're old.

[budman]

I finally made a license plate frame.

Also got the front brake line sorted out.  Piece of cake connecting the Harley style master cylinder to the front caliper with the right adapter.  Just need to ad fluid and bleed.

I ordered the custom throttle cables and the custom clutch cable from Motion Pro this week.  The clutch cable is just basically a short Harley clutch cable.  The throttle cables are Harley on the throttle end and Honda on the carb end.  Spent a lot of time working out the measurements and sent some detailed drawings to Motion Pro.  They said they could make the cables, no problem.  I might have them next week.

I also got my carb rebuild kits and a jet kit this week.  I need to do some homework before I dive in.

The only major parts left to buy are the air box and the fuel petcock.

Just some minor paint and polishing work and some minor assembly left to do.  I hope I can fire it up in about four weeks.

[Stev-o]

What kind of carb kits, you buy, Bud? I'm sure you've heard the warning of cheap aftermarket kits.

[budman]

What kind of carb kits, you buy, Bud? I'm sure you've heard the warning of cheap aftermarket kits.

I don't know who makes the kits, but I got them from 4into1.com.  I didn't cheap out.

I also got a jet kit, supposed to be specific to my spec's.

[budman]

Tried my hand at zinc plating.  All the small carb parts needed some help.  I derusted everything first with Metal Rescue.  Pretty pleased with the results.

Before.


After.

[MauiK3]

Wow, what a great build. I'm more or less an "enhanced stock" kind of guy but this is really great. Did you put together your own zinc kit?
Again, really nice bike.
Steve

[budman]

Wow, what a great build. I'm more or less an "enhanced stock" kind of guy but this is really great. Did you put together your own zinc kit?
Again, really nice bike.
Steve

Thanks, Steve.  I looked at some zinc plating kits, but they were kind of expensive considering I had everything I needed around the house minus the zinc ingots.  I bought a couple of ingots for $12 off of EBay.  Way more zinc than I needed.  I just cut off a couple of chunks and I'll save the rest for another day.  Pretty simple process.

[budman]

It's the little things that get you.

I had to make a small pin because I drilled out the carb rack in order remove the throttle rod so I could clean up and re-plate all the linkage.  Got the idea from the Hackaweek vids.

I also had to make a new collar that goes on the throttle rod.  I seemed to have misplaced the original.  I can't remember if I zinc plated it or not.  The plan was to have the carbs mounted on the bike today, but not sure it's going to happen.  I'm zinc plating the new collar at the moment and it takes a while.

[budman]

Any chance you filled that little notch you got in the rod, from drilling the old pin out? 
If not; your new pin may get caught in there and lock up your throttle.

Nah.

[budman]

Just about ready to install on the bike.

[budman]

Installed the carbs, but I have to take them back off.  I forgot to install the four washers that go on the choke linkage before the small cotter pins.

[WesTenRacing]

I've been following this build since I joined the forum.  Very nice job!  I look forward to the maiden voyage.

[budman]

I've been following this build since I joined the forum.  Very nice job!  I look forward to the maiden voyage.

Thanks. I'm looking forward to the maiden voyage too.
 

[budman]

My custom cables arrived.  Sure hope they fit.  Only one way to find out.

[budman]

For the most part the cables worked out.  I had to send the push cable back and have a little bit a free play added.  It was about 10mm too short.

Today I sprayed the final coats of clear on the wooden tail section.  Next weekend I'm going to cut and polish the tank and tail section.

The carbs are pretty much ready to go.  Just waiting on a tee so I can hook up the fuel line.  I ordered an Airbox from Cognito Moto.  Hopefully I'll have it next week.

I had to take the CB750 off the lift today so I could install a new starter in my Chobber.  The CB750 looks so much better on the ground.  Can't wait to ride it.

[palepainter]

Oh ya.... Looking so sweet.  What tank did you start with?  IT is going to be a sweet scoot.

[budman]

Oh ya.... Looking so sweet.  What tank did you start with?  IT is going to be a sweet scoot.

Thanks.  It's a heavily modified Suzuki GT750 tank.  1975 I think.

[budman]

Shiny!

[budman]

Major milestone.  Just put oil in the bike, hooked up the starter wire, turned the key on and hit the start button.  So smooth.  Only thing better would be to put gas in it and hear it run.  Soon!

[budman]

[Retro Rocket]

A shot of the tank here, a shot of the tail there, in my day you'd be called a "Pr1ck teaser"....

[budman]

A shot of the tank here, a shot of the tail there, in my day you'd be called a "Pr1ck teaser"....

Hold on to your ying yang.  You'll see a finished bike at some point.

[budman]

After some futzing I have a slightly modified Cognito Moto airbox that fits.

[markreimer]

Oh I like how that looks!!


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[Stev-o]

Shiny!

Simply beautiful, Bud!   

What main jets do you plan to use with that airbox and exhaust?

What else is needed to fire her up?!