Author Topic: Late CB750 K0 Mold to Gold, the nugget. (Read 37814 times)

Don R · « **Reply #250 on:** April 29, 2021, 06:09:26 PM »

Sounds like fun Terry. I'll be watching that build.
I'll need some help with my old 1124, it's got a tight spot when I turn it over, The crank doesn't appear to be bent, it won't kick over even with the plugs out. A Hayabusa starter goes rurr rurr rurr. I've replaced all of the kick start parts and oil pump. New yellow crank bearings, pressure pre-lubed with 20W50. I'm suspicious of an aluminum rod being bent. It also had an o ring stuck under the copper head gasket.
The owner passed away so I can't ask why he stopped racing it. The pegs were bent forward like it was hit from behind or came off the trailer hard. He had pegs on the swingarm and shifted by hand.

Don R · « **Reply #251 on:** May 04, 2021, 05:35:59 PM »

I assembled the airbox and put the gas cap and latch on today. One of the top plate spacers on the top of the airbox was missing, I looked for an hour, finally took one from a newer air box. It was stuck to the bottom plate, right there in front of my face.
I used hardware from a black K2 airbox. I'm sure I've done that once before but I'm lucky to get one turn of threads on the top nuts. This might call for some chicanery. Whatever that is.

Don R · « **Reply #252 on:** May 05, 2021, 07:29:52 AM »

The later airboxes are indented on the inside helping the bolts reach through. I got a full nut of threads on the blue green bike so I have figured it out at least once. The sandcast has it's original airbox stored away so apparently I've made this work twice before. Maybe I can read my own build thread to see how I did it before and that's what pisses me off. 0oops wrong thread.

Terry in Australia · « **Reply #253 on:** May 06, 2021, 04:11:06 AM »

Quote from: Don R on April 29, 2021, 06:09:26 PM

Sounds like fun Terry. I'll be watching that build.

I'm interested in this "1124 Engine" Don, a stroker 970, or bigger again? Well I chickened out today,Spotty's $1500. (around $1000 USD) for his K7 that I originally swapped for my horrible ZZR1100, but he wanted back again (fair enough, I'm not a K7 fan anyway) came thru today, so I bought new Cyclex "Super Rods", valve springs and keepers for the F2 engine I'll be using, plus new cryo cam and primary chains, new top and bottom studs and nuts, and new special F2 valve springs and keepers. On top of the RC970 kit, and the $300 (USD) I paid for a Norris K134 cam and a spare F2 cam (still good to have in a K0-K6 engine) I've spent over $2K USD, but if that all it costs me (plus gaskets, etc) it'll still be a cheap engine.

Don R · « **Reply #254 on:** May 06, 2021, 02:22:46 PM »

I lost my spec sheet from when I had it apart, it's a welded stroker and large bore. The PO said it ran within .02 of whatever nhra record there was back then. When the weather looked to improve he was questioned about if he got the record would he tear down for an inspection. If I had known he would pass and I would end up the caretaker of the bike I'd have pursued the info more. I'm tracking his old partner but only have the town.
The PO's family called it a 1200, that was a little optimistic but it is big for a sohc 750. I bought it for the sandcast's rolled rim that was swapped to it and an ARD mag that was still on it. Carbs, wheelie bars, header, all of the other good stuff was sold off.

Don R · « **Reply #255 on:** May 08, 2021, 02:52:37 PM »

I realized last night the speedo hasn't been repaired from the garage accident that killed it's matching tach. I took a break to think about it and am heading out to tackle it.

BenelliSEI · « **Reply #256 on:** May 08, 2021, 02:59:37 PM »

Quote from: Don R on December 02, 2020, 09:36:25 PM

I got the new to me old original seat from Hondaron today. It looks really good, the vinyl is a little hard, I'll soak it with Avon skin so soft as soon as I get some more. In the meantime I may take a shot at welding this seat pan. I read here that the red foam in the middle can be recycled with layers of white seat foam. I have some Goldwing seats apparently made by lazyboy. I may go to town on them with my electric knife.
I just practiced on a smoked ham so I have it all tuned up.

Don.....are you going to save that cover and reuse? With Avon product? Tell me more. Thanks!

Don R · « **Reply #257 on:** May 08, 2021, 04:02:58 PM »

I've used the skin so soft bath oil on my sandcast seat cover since I got the bike. When I got it if you pushed on a square in the pattern the entire square moved at the heat seam. I knew it would crack and then I read about the oil. My wife had some, people use it to repel mosquitos. I put some on a small piece of towel and rubbed it in. It looked shiny for a minute and soaked in so I applied more. Eventually it appeared wet so I left it for a week and buffed it with a soft rag. It's not like new but kept it's texture and still has not cracked. If you push into it with your finger the vinyl conforms to your finger now. I got that bike 10 or so years ago. Just finished the bath oil recently, I use it on all of my seats. The gl1000 new take-off seat has a couple white seam cracks showing though.
This seat I just got has something else on it already, the bath oil kind of repels in some areas. I've kept after it and so far so good.

BenelliSEI · « **Reply #258 on:** May 09, 2021, 05:29:03 AM »

Thanks..... I’ll give it a try!

Don R · « **Reply #259 on:** May 09, 2021, 09:20:24 AM »

The best part is, it doesn't make them slippery like Armor All. A new seat looks, well, new. The original cover is like a favorite leather jacket. Doesn't pretend to be new but looks good anyway.
The new Yamiya red seat foam on my sandcast is cushy though, and it isn't sifting through the seat pan holes.

My new to me gold gas tank, trying to press a flare on the pin with no success.
https://photos.app.goo.gl/CByZz1uPvwQt9Q1e8

BenelliSEI · « **Reply #260 on:** May 09, 2021, 11:52:27 AM »

Pressing never works for me. Take a long, sharpened centre punch and hit it on centre (with partner holding a large counter weight on the other end..... watch the hammer stroke!!

Terry in Australia · « **Reply #261 on:** May 09, 2021, 05:18:19 PM »

Mark Paris (Hondaman) used to sell a neat stainless steel screw and acorn nut set for installing your gas cap, I've used two recently, and the good thing is there's no chance of damaging your new paintwork. I can't remember how much money they cost, but were cheap, and worth every cent.

Don R · « **Reply #262 on:** May 10, 2021, 10:23:04 AM »

I actually had a Hondaman bolt and nut for the latch end but no nut for the pivot end. Not sure how that happened.
It came up short two short light tubes for the speedometer. I have two long ones from a k1 (didn't work) and a pair of bashed k1 gauges that can each donate a white tube. I got two plastic housings and lenses off of ebay, I sanded and polished the back of the rim and painted the chrome inside with a chrome paint marker. Not as shiny as oem but close.
I believe I could convert a k1 gauge by trimming a K0 plastic housing and crimp it on like a k1 does. Assembled, it would appear to be K0. I have a set of new crimp rings and a broken plastic ring to test it on. One of these plastic covers will sit in reserve for the sandcast's speedo which has developed a crack. I really don't mess with anything on it until it's necessary.
I have offered to trade K1 gauges for K0 but everyone just wants to buy my k1 stuff. I bought a few K1's on ebay when they were still cheap and I couldn't afford/find K0.

HondaMan · « **Reply #263 on:** May 10, 2021, 05:03:14 PM »

Are you up to trimming screws shorter? I still have the SS nuts and washers for the hinge pins (although yours might be a bigger nut if before 2018- then they might not match?). I can't find the 1-1/8" SS screws in 4-40 since about 2016, have run out of the right length.

Terry in Australia · « **Reply #264 on:** May 10, 2021, 06:23:23 PM »

Quote from: HondaMan on May 10, 2021, 05:03:14 PM

Are you up to trimming screws shorter? I still have the SS nuts and washers for the hinge pins (although yours might be a bigger nut if before 2018- then they might not match?). I can't find the 1-1/8" SS screws in 4-40 since about 2016, have run out of the right length.

I only started using them 6 months ago when I found the package you sent me many years ago Mark, great little kits, and no fear of damaging your new paint!

Don R · « **Reply #265 on:** May 12, 2021, 04:52:04 PM »

Thanks Mark, I'll keep it in mind on the next one. I think I have a long and short bolt, just missing a nut somehow. I got the gauges assembled. The lenses are from two batches, one is yellowed one is pretty clear. I'll need to see how bad it bugs me later. No going back now. I want it running in a couple weeks for my car show June 6.

Don R · « **Reply #266 on:** May 14, 2021, 06:57:46 PM »

I have the gauges installed and have gauge parts from one end of the bench to the other. I'll re-assemble the k1 stuff and pack it away for now. This leaves a new housing for the sandcast's speedo in case I ever decide to repair it's cracked housing.

Don R · « **Reply #267 on:** May 16, 2021, 07:48:13 PM »

I cracked off the main harness sheath near the headlight bucket without damaging any wiring, I was able to feed it through 3 sections of shrink tube so with a little taping it may resemble original and not damage the wires. That's about it for now, we went drag racing today.

Don R · « **Reply #268 on:** May 17, 2021, 03:12:40 PM »

I got tank trim from DSS today, it was made in the UK, also I got exhaust gaskets (Taiwan) and rear foot peg rubbers from Honda (Japan). I had to bend the painted tank tabs back to get the trim on, it went well thank goodness.
It reminded me of when I bought the sandcast at the estate sale of my old friend that ran the big 4 bike shop. The old 750 experts were loudly proclaiming it had the wrong tank trim because there wasn't a stripe in it. I was praying for them to shut up about the 6-69 date on the manual, the lack of a date on the build tag and all the other early K0 tells. I'm surprised they didn't complain about the missing clutch bolt.
https://photos.app.goo.gl/LWzCSTUfp7UvJ3CZ8
https://photos.app.goo.gl/5xqNWGWC6j84AgNQ8
https://photos.app.goo.gl/3cHR66BbkTs6y2iQ6

Don R · « **Reply #269 on:** May 19, 2021, 07:27:11 PM »

I got the front wired back up, cleaned and greased. The sheath has been replaced but the rear wiring is still unhooked.
Wiring tip, if you hook the two big wires to the top of the battery everything else works better. I put the front turn signals on the proper sides but that turned them over and the bottoms aren't as pretty. I'll need to raid the parts stash for a pair of better ones.

Edit,
All of the wiring is now working, the blinkers were slow at first but with the battery charger on, they began to blink. No progress today between mowing and getting the racecar rig ready for the weekend. I had no time.

Don R · « **Reply #270 on:** May 24, 2021, 03:34:08 PM »

Well, we got a weekend of racing out of the way, washed the trailer and truck, planted flowers and mowed the yard. A little racecar maintenance left but the truck needs the bed lifted, new brake lines, the frame c notch kit welded, new hitch and wiring plug re-installed. I was hoping to show this bike the first Sunday in June at my car show.
I'm a grumpy old bastard today, maybe winning our money back at the races has become too common for me.

Don R · « **Reply #271 on:** May 25, 2021, 03:10:42 PM »

The DSS reproduction seat is on, I realized I haven't ratholed a good petcock for this beast. Parts are looking thin but there's another box of new stuff I didn't dig out yet. Here I go.
I don't really want a leaky petcock on this freshly painted tank, leaning towards new Honda.

This just in, I remembered the one that came on this bike got refreshed when I got it running two years ago. I plucked it off the poo brown tank and it still had a dab of fuel in it. The painter lined the gold tank, Caswell was also in the threads so I greased a tap and chased them clean.
The old brown tank is destined to get painted 2013 tiger eye pearl with k2 stripes and go on my k2 hot rod so I've kicked the petcock issue down the road long enough I won't have to wait to put the gold tank on this bike.

Don R · « **Reply #272 on:** May 27, 2021, 04:04:29 PM »

The rear wheel is back on, I used an incorrect brake panel until I get new brake shoes. The funnest part was having the honor of being the first guy in 51 years to clean the inside of the chain guard bracket. I got the bike a new short chain guard, the one that came on the bike was cut down to fit lowering blocks.

BenelliSEI · « **Reply #273 on:** May 27, 2021, 05:25:58 PM »

Quote from: Don R on May 24, 2021, 03:34:08 PM

Well, we got a weekend of racing out of the way, washed the trailer and truck, planted flowers and mowed the yard. A little racecar maintenance left but the truck needs the bed lifted, new brake lines, the frame c notch kit welded, new hitch and wiring plug re-installed. I was hoping to show this bike the first Sunday in June at my car show.
I'm a grumpy old bastard today, maybe winning our money back at the races has become too common for me.

Good to hear you got to the track. I’m still fried about our cancelled Mosport season opener. Of course, the weather was great. We’re off to a double header at Calabogie in two weeks, and just got the news it’s a “GO”. Seven hour race on Saturday and an 8 hour run on Sunday. My buddy from Calgary can’t make this one, so lots of seat time for three drivers. CAN’T WAIT!

Don R · « **Reply #274 on:** May 27, 2021, 05:30:42 PM »

My Daughter's been wearing her Simpson driving shoes all day at the track for years. She finally chunked the soles. I tried black RTV but she had it peeled off in no time. Duct tape for the win. Well, we didn't win but we raced with taped shoes. She bought new ones, not here yet. Sent an email a couple hours ago.

News:

Author Topic: Late CB750 K0 Mold to Gold, the nugget. (Read 37814 times)