'81 CB750C "Rock-It"

[shinyribs]

Really,really,really diggin' those pipes! Tucked in nicely and upswept. You oughta get a good lean outta those.

[Hoosier Daddy]

Thanks! A bit of thought went into the exhaust. I'm happy with the way turned out....Hoping they sound as good as they look.
 

[Hoosier Daddy]

Pulled the trigger late Tuesday on my master carb kit from Randakks, Got it in the mail last night



While I was waiting I started the disassembly of the rack. Got the first one soaking already this morning...Damn good little project for the 3 day weekend!


 



Also cut the first layer of foam for the seat and used spray adhiesive to attach it to the pan.

[motogrady]

Damn you do some nice work Hoosier.

I'm working getting an '81 C model, same bike as what's in this thread.
Most is there, but the OEM side covers are missing.

Any chance you have a pair you'd like to sell?

[Hoosier Daddy]

Sorry motogrady, no such luck. I didn't even get a set for my own. I did pick up some sheet aluminum to try my hand at metal forming when the time comes. All that came with this basket case bike in boxes was a single CB900C side cover

[motogrady]

Thanks for gettin back Hoosier, kinda figured it was a shot in the dark.

but hey, you never know........

[Hoko]

You have an accelerator pump for each carb?

[Hoosier Daddy]

Nope Hoko, one accelerator pump, bottom right in the pic, goes on carb #2... The other 4 diaphrams you see are for the  the Air Cut-out Valves, one on each carb.

[Hoosier Daddy]

A small side track. Yesterday I spent the better part of the day cleaning the shop, thanks in no small part to our member Manual.

  See ,  I have been puzzled by the left rear engine mount in that mine has about an inch gap from the spacer on the bolt and the engine case.




I had searched the manual, the factory parts microfisch, even e-bay items for sale and the engine mounting looked to be what I have on hand. Although the right and left are drawn differently, they both are listed as #3 on the microfisch, must be the same part, and that is what I have...





After seeing member Manual has the same '81 year "C" model as this bike and his is in unmolested original condition. I requested a pic of his hoping to see what I am missing. Sure enough, he was able to help and supplied a picture of exactly what I was looking at... there it was, big as life... another spacer (or what I thought was a spacer)




More research...No where in the fisch titles could I find referance to the engine case cover for the front sprocket that is on the left side. I read the manual on engine removal hoping to find detail on this mystery "spacer" then I saw this pic of the front sprocket...



THAT'S IT!
Knowing I have had a bolt loosly threaded into a hole since the day I got it that did not seem to hold the cover in place. Then it dawned on me! Now, where is that piece in the microfisch. Not pictured with the front sprocket, I resorted to opening each microfisch one at a time, regaurdless of it's title... when I got to  "OIL PUMP" there it was, listed as #10 factory part # 11615-445-000 case protector




So I started searching the shop, picking up along the way, looking through each remaing box, cleaning off the work benches of assorted parts, tools, and shop towels, and cleaners... (huh, somehow I got two cans of Mothers polish)
 But no avail. Apparently to P.O. did not box that piece up. Kind of like a lot of the bits such as the headlamp trim ring or the inner drives to the Tach and Speedo cables .
 Oh well, mystery solved, a $20 "Buy It Now" on e-bay and I'll have it by the end of the week.
AND I got a clean shop! Thanks all to Manual coming to my aid in my time of need.

[Manual]

Damn Hoosier I was hoping that would trigger a "oh damn thats what that part in the box is for" moment, not a 20$ trip to ebay! Glad was able to provide an assist and let me know if I can give you anymore rust hewn badly painted pictures of my bike again, lol.

[Hoosier Daddy]

Thanks Pal! The e-bay'ed case protector came today.
 But has been a BAAAAAAAD week at work, not near enough time on the bike or here on 750-s this week. I did manage to keep my commitment to "Bike Night" on Thursdays and got some work done on the carb rebuilds.

Two down, two to go.



And while the Bit -n-Pieces of the second one were soaking in the Berryman's I did a little clearcoat strip and the polishing on the caps.



*Note* These caps and pistons are matched sets and it's important to keep them mated. That's why you see the coffee cans numbered 1-4 and  the board numbered the same way. Helps remove the "Human Factor" in keeping things straight.
  I also stopped by an upholstery shop on the way home and picked up some marine grade 1/8" foam to cover the entire seat pan to take up the imperfections and give the vinyl a little padding.
Hopefully you'll see more progress on that soon. T.G.I.F.!!!

[Hoosier Daddy]

Stayed out late in the shop last night, but I got the four individual carbs back on the rails that were cleaned and spiffy, and assembled tyhem into a rack again. Only two outer choke plates to put on and then make sure the linkages do not bind before installing.
 Also got the thin foam on the seat so it is ready for covering... should finish that quickly now.

Started polishing the engines side covers. A couple more loose ends to gather but starting to see the light at the end of the tunnel.

Sorry no pics, it was way past my bedtime.

[Hoosier Daddy]

Time for this weeks Sunday morning update.
After getting the carb rack back into one assembly I was excited to get them remounted. Cleaned up the factory airbox and carefully guided the insulators, clamps and hose connections, and cables into place. Looked good!
 Then as I was walking back into the house it dawned on me that in my giddyness, I had completely forgot to do the bench sync procedure... DAMN! So yesterday I pulled them BACK off and got my piece of thin music wire and adjusted each throttle butterfly to have the same gap. DONE!
 Then, being of sound mind, I realized it would be much easier to install the starter with the carbs off. Unfortunatly the PO had snapped off the cover plate bolts in the starter ends. I had picked up a nother used starter as a spare but it was in rough shape.
Knowing I am pretty good at removing broken bolts so I tried all my tricks, a while back I tried notching them with my dremel to use a flat head screwdriver, soaking them in PB Blaster and a little heat... no luck.
 Tapping them around and out with a pin punch.. nope. So I leveled it up on the drill press and drilled a small pilot hole, Grabbed my reversable hand drill and a left handed bit... no use. Last resort was to use an easy-out, after several attempts and redrilling I was starting to get into the threads, then figured "This is it, you're going to come out or I'm done with you" and promptly snapped off the damn easy-out... always hate those things anyhow. .
 So I dissembled both starters, spread out the parts, and assembled one good one using the best parts of each. Bench tested and installed it. WHEW!

Then back to reinstalling the carbs, cables, boot clamps and she looked good, the throttle and choke works smooth..





Last night I took my black vinyl and cut it to the rough size for the seat cover and started back on the seat. I use a good industrial contact cement called "Pliobond" and actually glue the cover to the fiberglass pan on the underside. With an assortment of spring clamps an wood strips to hold it in place, I start from the center and stretch it across side to side. Now let that cure overnight. This gives you a good base to start with and you can work out from there front to back. So today I can start working it out to the ends.

[Hoosier Daddy]

While waiting for the contact cement on the first bit to dry, thought I'd do something to keep me out of the doghouse like mow the front yard.



Then working outward glue the next section and reclamped.... and find something else to do, like mow the back yard.



Then keep glueing and moving the clamps along the edge every couple hours, by now the adult beverages are sounding good, crack a cold one (I like mine garage floor temp) And mow down by the lake for the first time this year.



Then the last section today, I will let it cure overnight to set good and strong before working around the corners to the front and back edges.

[Hoko]

Wow!  The front 40, the 40 around the house and the lake 40.  I hope you have a 12' wide mower!

[Hoosier Daddy]

I wish... 54" Craftsman rider. Takes about 6 hours give or take... depending on how many beers are involved.

[shultz_1978]

Is that because After 4-5 beers Mowing in 3-4 gear don't look so bad.  Or after 4-5 you just don't care how long it takes. One more brake want hurt.

[TOOLS1]

I would get a small herd of goats/sheep/cattle/horse.....
TOOLS

[easyrider12]

Wow hooter daddy, I just started into the builds and at page 11 you have quite the piece of craftsmanship or artwork going on.   At page 11, you match random thoughts, and half of that is my useless dribble  lol.   Caught a glimpse of Moto's "c" project as well.  Can't wait to read up on the rest, even that hackjob piece.... cheers.     p.s my little brother has a mower project, and honda project in the works   lol.  

[Hoosier Daddy]

Shultz is on it, but then you gotta figure in piss breaks get more frequent.
Tools: We had livestock as a kid, too much maitenance and all those "land mines" they leave is a pain.
EZ Rider.. WELCOME to the nuthouse, yeah I kinda ramble on about what ever pops into my pointed head at times but glad you like it.

Tonight I glued to the front and rear of the seat, just have the coners left to do. That is the hardest part to keep the wrinkles to a minimum. Starting to see it now?





After that I moved onto the engine covers. Notice how every pic of my engine they are missing? That's because they were getting sanded and prepped for polishing. Finally hit them with the corse compound tonight, turning out pretty nice but very time comsuming. Next comes the fine compound and they should be ready to bolt on.