Topic: 1977 CB750F progress

[Zaipai]

I do like those grips nice choice..

.: Scott :.

[b82ta]

So, making progress on the engine... Heres a few photos.

[jaguar]

what are the plans for the motor?

[b82ta]

I was having some problems with the valve train, so I have a rebuilt head waiting to go on.  Hopefully that will take care of it!

[b82ta]

So I got the bike all back together.  Still more stuff to come but until I get more time/money, this is the way it'll be. More pictures to come also, this is just what I have on my computer.





I've put 800 some miles on over the last 4 days, 550 in one trip.  The photos where taken after day one of that trip.

[b82ta]

A few more photos.  Next on the list: I need to create a new rear brake lever.  My cheap knockoff piece finally bit the dust...

[b82ta]

So over the weekend I took some time and made myself a new brake lever.  It is a little over top strength wise, but I dont have a lot of tools and it was easier to make this way.  I also should have designed it so lever sat up a bit higher, I can make a new backing plate later that should fix that.

[hapakev]

Wow, thats beefy.  What happened to the old seat pan?  Did you need the space for 2-up riding?

[b82ta]

Yeah its probably a little over beefy... I still have the Cafe seat and tail, I just need to finish the new mounts for it.  I wanted to at least have the option to be able to have 2up, also nice for longer trips so I have a place to lash a bag down.  Hopefully over the next couple weeks I can get the Cafe seat set back up

[b82ta]

These were posted in another thread but I'll link them here too.  I'm working on putting my Architecture portfolio together, and took some new photos of my bike yesterday. Here's a photoshop composite of two of those

[cbstevef]

Hey, I love your thread so far and the progress is awesome! I also have a 77 cb750f and am interested in doing the same tail mod as you. Just wondering if you have any other photos of it so i can see how you did the brackets and seat pan! Id really appreciate it! thanks!

[b82ta]

Back from the dead! - It's been just over 8 years, and I am just wrapping up another round of work on the CB750...  As is typically the case, other parts of life took precedence over motorcycle projects.  I rode the 750 in it's previous build from 2012 until 2015 (barely rode, I should say).  In 2015, I had a little more time for wrenching, found a space to work in, and decided that it was time to make a couple of small updates.  Planned updates included a new rear brake master cylinder, clean up the existing wiring, and re-install turn signals.  From 2015 until 2020 - I successful in partially disassembling the bike and not much else.  Queue up the global pandemic and Stay at Home Orders, and suddenly I had extra time and a partially disassembled motorcycle in the garage. 

This is what I have accomplished during this round (split by category, kind of):
Electrical
--Completely rewired the entire bike, designed all new circuiting, all new wire in concentric twisted looms where possible
--Installed Solid State Regulator/Rectifier
--Installed Morimoto 5 Stop Taillight
--Swapped headlight bucket and installed Morimoto LED Headlight
--Installed Revival Cycles Supernova Turnsignals
--New fuse block, headlight, and turn signal relays
Brakes
--Upgraded front to rebuilt 1982 GL1000 2 piston calipers
--Front master cylinder from 2012 Triumph Daytona
--Rear master cylinder from 2004 RMZ250
Engine
--Install K&N Pods
--Rebuilt Carbs, jet for K&N Pods
--New choke lever (shimano friction shift lever)
--General tune-up/adjust (cam chain, valve clearance, etc.)
--Fabricate new silencer hanger, clean and repaint exhaust
--Updates to oiltank vent/return piping
Chassis/Body
--New Gauge mounts
--New tail section infill/taillight mount
--Rework seat pan
--New seat foam
--New seat cover
--"legal" temporary license plate mount

Here are some photos from the first couple times out. 








And a couple progress photos:

New Wiring partially installed


Pods and new choke lever


New seat - Test fit


New seat - At Tank


New tail enclosure/tail lights and turnsignals


Lights on


Rear brake master cylinder

I am still sorting through some jetting issues (pods of course) and have a few more changes to make before calling it "done" for this year.  It sure feels nice to have it on the road again.

Stay tuned for more photos as the last few items get buttoned up!