Author Topic: Terry's NEW Redneck CB750 rebuild. The "Swamp Rat". Too soon? Nah..........  (Read 48685 times)

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Offline Terry in Australia

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Re: Terry's NEW Redneck CB750 rebuild. The "Swamp Rat". Too soon? Nah..........
« Reply #450 on: November 18, 2019, 01:17:03 AM »
Thanks guys, you know it's that long since I looked at the original pics of the swamp rat I almost couldn't believe how far it's come in 6 months, but I'm glad that it has, and I don't regret the injuries that I've sustained along the way, even though I seem to have injured myself more working on this bike build, than just about any other? Oh well, it's a bike again, and a bike I'd be happy to ride anywhere. I keep thinking about riding it home to Bairnsdale and showing it to Gary, the guy I bought it from, but maybe that's not a good idea?

I bought some OEM grips for it a couple of weeks ago so I better put them on, and looking at the exhaust I better think about the OEM end caps, they just look a bit "wrong" without them? I'm off to hospital tomorrow to get the face fixed, but should have a few days off afterwards, so hopefully the weather will be kind and allow me some time to sort the gearbox out, it would be nice to have all 5 gears working, because I think a ride will be in order soon.

Spotty, if you hear of any CX500's that need towing away (except mine) let me know, I'm still looking for a frame. And probably lots of other bits too. As I get older a frail-er (if that's a word) I wonder what a CX500 trike would be like? (apart from heavy and slow) ;D
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline spotty

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Re: Terry's NEW Redneck CB750 rebuild. The "Swamp Rat". Too soon? Nah..........
« Reply #451 on: November 18, 2019, 02:20:03 AM »
Sorry, you're the first person I've known to willingly obtain a cx since the late 80's and even then it induced feelings somewhere between pity and mirth
i blame Terry

Offline Terry in Australia

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Re: Terry's NEW Redneck CB750 rebuild. The "Swamp Rat". Too soon? Nah..........
« Reply #452 on: November 18, 2019, 11:40:39 PM »
Thanks mate, well I rode a "Custom" when it was new and thought it to be a high revving, slow POS. Years later, a workmate was looking for a bike, he was in his 60's and not a hoon, so I found a cheap CX500 shadow, took it for a ride, and around town, thought it was actually pretty good. A few years ago I saw a cheap CX500 Custom in nice original condition going on Gumtree, and did a deal with the PO. While I was there he had other guys ringing him, offering him much more money than the asking price, but he was good to his word, and I bought it.

I had fun with it, installed an 18" rear wheel off a shadow to raise the final drive gearing to that of the shadow, put good tyres, a "Terry Custom" exhaust, and Mikuni carb conversion, and it was a much nicer bike to ride. I put it on Ebay hoping to get my money back, and made enough out of it to buy a Yamaha FJ1200 and a BMW K100RS SE. Bargain! The one I have now is a shadow, and I wish it was a Custom with an 18" rear wheel, but no biggie, I'll make something interesting out of it, eventually.

OK, just back from hospital, had the facial surgery by the plastic surgeon, and feel pretty good. I've got a week off work and the weather is only getting better, so time to sort the last few bits on the Swamp Rat, then I'll take a quick look at the K1 project, before starting on the Z1000 "Mad Max" build. Life is sweet! ;D

Terry's GAMP by Terry Prendergast, on Flickr 
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline spotty

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Re: Terry's NEW Redneck CB750 rebuild. The "Swamp Rat". Too soon? Nah..........
« Reply #453 on: November 19, 2019, 12:14:38 AM »
Just be careful out there on Thursday, gonna be very high 30's, keep your liquids up
i blame Terry

Offline Terry in Australia

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Re: Terry's NEW Redneck CB750 rebuild. The "Swamp Rat". Too soon? Nah..........
« Reply #454 on: November 19, 2019, 12:25:14 AM »
Just be careful out there on Thursday, gonna be very high 30's, keep your liquids up

Thanks mate, will do, lots of icy cold Ginger Ho's to drink as I need the empty bottles for my newest batch. ;D
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline vik351

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Re: Terry's NEW Redneck CB750 rebuild. The "Swamp Rat". Too soon? Nah..........
« Reply #455 on: November 19, 2019, 03:26:21 AM »
Thanks mate, well I rode a "Custom" when it was new and thought it to be a high revving, slow POS. Years later, a workmate was looking for a bike, he was in his 60's and not a hoon, so I found a cheap CX500 shadow, took it for a ride, and around town, thought it was actually pretty good. A few years ago I saw a cheap CX500 Custom in nice original condition going on Gumtree, and did a deal with the PO. While I was there he had other guys ringing him, offering him much more money than the asking price, but he was good to his word, and I bought it.

I had fun with it, installed an 18" rear wheel off a shadow to raise the final drive gearing to that of the shadow, put good tyres, a "Terry Custom" exhaust, and Mikuni carb conversion, and it was a much nicer bike to ride. I put it on Ebay hoping to get my money back, and made enough out of it to buy a Yamaha FJ1200 and a BMW K100RS SE. Bargain! The one I have now is a shadow, and I wish it was a Custom with an 18" rear wheel, but no biggie, I'll make something interesting out of it, eventually.

OK, just back from hospital, had the facial surgery by the plastic surgeon, and feel pretty good. I've got a week off work and the weather is only getting better, so time to sort the last few bits on the Swamp Rat, then I'll take a quick look at the K1 project, before starting on the Z1000 "Mad Max" build. Life is sweet! ;D

Terry's GAMP by Terry Prendergast, on Flickr

LOL, remember the Cheech and Chong skit about "Hows our big brave  motorcycle rider today" rippin the bandages off...???

Hope he used super glue on the new konk FFS...!!!




vik...

Offline Terry in Australia

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Re: Terry's NEW Redneck CB750 rebuild. The "Swamp Rat". Too soon? Nah..........
« Reply #456 on: November 19, 2019, 04:05:11 PM »
Nice, thanks Vik, whatever they did I'm pretty happy with, for the first time in a weak I don't have any pain worth talking about, so I'm a happy big brave motorcycle rider today. Hmmnnn, I wonder if I could go for a scoot? It's a nice day outside, and there are several bikes that I could choose from?

Not sure if I'll be able to sneak past the wife though, damn me and my "loud pipes save lives" credo! ;D
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline Terry in Australia

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Re: Terry's NEW Redneck CB750 rebuild. The "Swamp Rat". Too soon? Nah..........
« Reply #457 on: November 22, 2019, 12:12:56 AM »
Well back to the Swamp Rat. What's better than spending a warm sunny day wrenching on a bike? Riding one, you say? Riding one and stopping at your favourite pub for a refreshing bucket of alcohol? Riding one with a hot babe on the back and stopping at your favourite pub for a refreshing bucket of alcohol and a fist fight? OK, well, yeah, that probably is better than just working on your bike in the driveway, but what the hell, I'm not supposed to be riding at the moment anyway, and fistfights are verboten.

I wanted to see why I couldn't shift gears from first to second (or third, fourth and fifth) but I didn't want to drop the oil before I removed the transmission cover, so I very carefully tilted the Rat to the right, and used a couple of engine stands to rest it on. Needless to say, until I had it back firmly on the centre stand, I was sh1tting my pants that it was gonna go crashing down.

Swamp Rat Friday 22 Nov 2019 by Terry Prendergast, on Flickr

Swamp Rat Friday 22 Nov 2019 2 by Terry Prendergast, on Flickr

But it worked well, and I didn't spill a drop of oil. I removed the transmission cover, and took a peek at the shift mechanism. It was weird, everything worked fine, and I was able to manually shift right thru the gears.

Swamp Rat Friday 22 Nov 2019 4 by Terry Prendergast, on Flickr

I put it all back together and fired it up, and changed up thru the gears while on the centre stand, everything worked fine. Weird.

Yes, there was some sloppy crap left over from it's previous life.

Swamp Rat Friday 22 Nov 2019 5 by Terry Prendergast, on Flickr

Anyway, I cleaned it out, and it's all better now. I removed the "Oury" grips, which I usually love, and replaced them with genuine expensive Honda OEM grips.

Swamp Rat Friday 22 Nov 2019 3 by Terry Prendergast, on Flickr

On a mostly original bike, they do look better, I think.

Swamp Rat Friday 22 Nov 2019 7 by Terry Prendergast, on Flickr

There was plenty of time left, so I concentrated on the electrics, and by the time I got bored and decided to come in I had all the lights working, indicators, brake lights, idiot lights etc. I still haven't got the electric starter working yet (works when I short the solenoid) but the kicker works fine, and it starts easily, so no biggie, but I will get it working, because that stuff bugs me.

I ditched the new OEM fuse box and replaced it with this little trick flat blade fuse junction, with a 15 Amp circuit breaker. Much better idea nowadays.

Swamp Rat Friday 22 Nov 2019 6 by Terry Prendergast, on Flickr

And by this time I'd decided that I've had enough, and so I grabbed a Ginger Joe, and came inside, in search of food. Tomorrow, we (might) ride, amigos! ;D
   
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline 754

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Re: Terry's NEW Redneck CB750 rebuild. The "Swamp Rat". Too soon? Nah..........
« Reply #458 on: November 22, 2019, 05:46:42 PM »
I don't know, but it looks like corrosion on the top of the bearing on the shifter side, I mean on this device it looks like metal eaten away. And the white stuff in the shifter side cover looks like it's  water sludge caused that .
 I didn't want to say it because I figured you knew, but if it's been sitting with water in it.. total teardown , all bearings are suspect.  I hope I am wrong.
 But let me tell you I bought a  KO motor in later frame , checked oil in tank, looked good. Thought I would run the engine, drained the oil, about a quart of water came out. So I flip it over, split cases to inspect, and it was not good, apart from the rust spotted trans bearings, I looked at the mains.  They all looked frosty, sort of etched, sorta like the skin on my aged arms.
 So I showed it to a couple engine builder guys...one said toast,  the other it might go a while.
 Then I thought about it, and I figure the shell bearings reacted to the water, and yes it would likely run.. but I bet in a thousand miles .. so I oiled everything up best I could, but  most of the bearings will be changed for me to run it and travel on it.

 I have a few more stories of doom to relate, for now I HOPE I AM WRONG......
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My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline PeWe

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The video of the running engine sounds like a rattling clutch combined with chains.

 Even worse than my K2 I have thoughts to replace the steel clutch basket to one with tighter fit on the splines. A friend has some I can test and go for the tightest one. My K6 has a tight one with min rattle. Or are the primary chains too stretched? Max 70mm slack when measured from oilpan surface to tensioner. New chains 65mm.  My K6 stronger chains ~64.5mm when new.

If running on points, measure the dwell at idle and adjust them to same value followed by ign adjustemt by strobe lamp make engine to run much smoother too.
CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline Terry in Australia

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Re: Terry's NEW Redneck CB750 rebuild. The "Swamp Rat". Too soon? Nah..........
« Reply #460 on: November 23, 2019, 02:51:30 AM »
Ha ha, no Frank, it must be your device, there was some sludge in the bottom of the selector cover, but surprisingly, no rust or corrosion. The "corrosion" you think you see is just some slop that I'd not wiped off properly before I took that pic.

Yep, the clutch has a bit of a tinny rattle, I didn't install the anti-rattle spring from the other clutch, so it's got the correct K2 clutch rattle. I had a look at the primary chain tension using the "push" test all those months ago Per, and it was fine. I haven't synced the carbs, and I can't find the new electronic ignition I was gonna put in it, so I'm still running the ancient points ignition, which is actually working quite well.

Only early days gents, don't sweat it. Once I'm up to it, I'll take it for a good ride before I hand it over to the new owner. ;D
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline ofreen

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Re: Terry's NEW Redneck CB750 rebuild. The "Swamp Rat". Too soon? Nah..........
« Reply #461 on: November 23, 2019, 07:39:50 AM »
I've noticed cell phone videos combined with tinny computer or device speakers seem to accentuate higher frequency engine noises.  My R100GS-PD has the usual airhead rattling, but on video it sounds like it doesn't have any oil in it.
Greg
'75 CB750F

"I would rather have questions I cannot answer than answers I cannot question." - Dr. Wei-Hock Soon

Offline Terry in Australia

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Re: Terry's NEW Redneck CB750 rebuild. The "Swamp Rat". Too soon? Nah..........
« Reply #462 on: November 23, 2019, 01:02:52 PM »
G'Day Greg, that's very true mate, the engine in the Swamp Rat is actually very quiet, but I did notice the "tinny" clutch rattle, which of course goes away when I pull the clutch in.

Hopefully I'll get out on it today or tomorrow and put some miles on it, I just need to revisit a couple of things before I'm comfortable riding it at speed, I've got a bit of a phobia of hospitals at the moment. ;D
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline PeWe

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I have heard that too when taking a video on my bike when idling. Valve train and cam chains sounds more. Clatter from flat slide carbs is loud.

Walls make sound to bounce around too.
CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline Terry in Australia

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I have heard that too when taking a video on my bike when idling. Valve train and cam chains sounds more. Clatter from flat slide carbs is loud.

Walls make sound to bounce around too.

Yeah mate, the sound is always amplified in my driveway too. I've been working on tidying up all the little issues with it before I hand it over to the buyer, he's getting a bit excited and asking for an update just about every other day, so today I'm taking it for a shakedown ride just to make sure it's not gonna explode on his ride home.

I took this vid of the clutch rattle yesterday, I could fix it, but it doesn't annoy me, and it's not nearly as loud as it seems in the vid. I'm glad I installed that oil pressure gauge, so far I haven't been able to coax the light to work, so it's good to know that it's got good oil pressure. ;D

I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline Terry in Australia

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Re: Terry's NEW Redneck CB750 rebuild. The "Swamp Rat". Too soon? Nah..........
« Reply #465 on: November 24, 2019, 07:55:47 PM »
Well it was the best of days, it was the worst of days. My beautiful (to me) Swamp Rat's oil pump let go at the worst possible time, and the engine is cooked. It was still a wonderful 28 miles, and I will rebuild, once the tow truck takes us both home.....
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline vik351

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Re: Terry's NEW Redneck CB750 rebuild. The "Swamp Rat". Too soon? Nah..........
« Reply #466 on: November 24, 2019, 08:43:29 PM »
Well it was the best of days, it was the worst of days. My beautiful (to me) Swamp Rat's oil pump let go at the worst possible time, and the engine is cooked. It was still a wonderful 28 miles, and I will rebuild, once the tow truck takes us both home.....

Prolly best it blew up under your arse aint it...???

Still under your control ... or cheappa price   ;D

vik...

Offline mick7504

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Re: Terry's NEW Redneck CB750 rebuild. The "Swamp Rat". Too soon? Nah..........
« Reply #467 on: November 24, 2019, 08:54:16 PM »
Well it was the best of days, it was the worst of days. My beautiful (to me) Swamp Rat's oil pump let go at the worst possible time, and the engine is cooked. It was still a wonderful 28 miles, and I will rebuild, once the tow truck takes us both home.....
Fcuk  ;D
If I was you
I'd be worried about me.

Offline jgger

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Re: Terry's NEW Redneck CB750 rebuild. The "Swamp Rat". Too soon? Nah..........
« Reply #468 on: November 24, 2019, 08:56:43 PM »
That sucks, but you still made it farther than my record. I rebuilt my old desert race bikes and made it about 25 feet down the driveway once. I dropped one of the uncaged needle bearings in the bottom end ( 2 stroke) and it made it about half way through the transfer port when the brand new piston in the brand new bore job tried to chop it in two. Had to hammer the brand new piston down to remove it and the cylinder. New bore,new piston, new rings, and new needle bearings for the small end of the rod. Did I mention the bore and piston were brand new?

I hope you never break my record!
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Offline PeWe

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Interesting to see how an oil pump can stop work completely.

Plugged oil passage to or from pump?

A lot of extra and heavy work pulling the engine.
CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline spotty

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Re: Terry's NEW Redneck CB750 rebuild. The "Swamp Rat". Too soon? Nah..........
« Reply #470 on: November 25, 2019, 12:28:46 AM »
Well that fcuking sucks

Quick transplant from the K7  ? I cannot guarantee in any way that it won't blow up either

Any ideas on why for ?
i blame Terry

Offline Terry in Australia

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Re: Terry's NEW Redneck CB750 rebuild. The "Swamp Rat". Too soon? Nah..........
« Reply #471 on: November 25, 2019, 01:15:04 AM »
Thanks guys, well I'm home again after a nice ride in a tow truck. Not as nice as riding the ol' Swamp Rat mind, but still good that I didn't have to push it home.

The bike was running really well, I'd ridden over to see Jeff at Ace Motorcycles, and to my absolute amazement, nothing had gone wrong. No missing, no farting, no smoke, no rattles, it was one of those days where everything was going right. I still haven't connected the electric start, so kick started it (started first kick) rode over to the gas station to fill up with 91, started it again first kick. Jeff wasn't in and his shop was closed, so I decided to do a good 100 miler to just enjoy the day.

Everything was working great, it was comfy, the brakes weren't binding, the forks weren't weeping oil, I was heading out on my favourite route, but when I thought the rocker ticking was a little louder. I looked down and saw that the oil pressure gauge, which had been reading a constant 60 PSI @ 60 MPH had dropped to zero, so I pulled in the clutch, and coasted to a halt. The engine conked out as I was coasting.

I pulled up, jumped off, and pushed it onto the footpath. I looked into the oil tank, and could see the bottom. A wisp of smoke drifted out. I let it cool down a little and kicked it over. It wasn't seized, but was making a forlorn squeaking sound, like a muffled Japanese groan... I knew then, that I'd killed it. I rang the RACV (Auto Club) and was happy to learn that due to my purchasing the top cover all those years ago, it wasn't gonna cost me anything to have it towed home. Sweet. What wasn't so good, is that I would have to wait for up to 3 hours, due to the towies being very busy today. Oh well.

What was interesting, was the amount of guys who stopped to see if I needed any help? I was standing up looking at it, and as I was adjacent some traffic lights, with pretty much every light change I had guys stopping and asking me if they could help, if I needed fuel, what sort of bike is it, did I need a push, etc? I sat down with my back to the lights as I was almost getting sick of thanking everyone, but explained that it was dead, and a tow truck was inbound. This has happened to me a couple of times over the years, the last time was 5 years ago when the coils were playing up on the mighty black 'Wang, and once again, I was taken aback by the amount of guys offering help. When those "Negative Neville's" start telling you that the world has gone to sh1t and it's every man for himself, tell them they're full of it, there are still tons of good folks out there wanting to help a dude in need.

Finally the tow truck driver arrived, (only around maybe an hour after it conked out) and loaded the poor old swamp rat and me into his truck, and took us both home. I was trying to decide on the best course of action, and while it's always subject to change, I think I'll pull the engine out of my K2 "Bitsa" and swap it in. It felt like the prospective buyer might have changed his mind after I told him what had happened, so if that's the case and I'm keeping it, well, I want to make sure it's got a good engine in it, and I know the Bitsa engine is fine. That is of course, after I'd popped the valve cover off the swamp rat's engine to see what carnage lies within.......... ;D


« Last Edit: November 25, 2019, 01:19:33 AM by Terry in Australia »
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline PeWe

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  • Bike almost back to the 70's 2015
I had sudden low oil pressure on my K2 in the beginning.
I had somehow calculated wrong after the  oil pump repriming.

I have seen that the oil tank get oil filled very late, almost empty until the flow start to fill oil tank so level rises from almost dry.
Both my bikes.

That has been my main concern for a while inspecting oil tank after 5 minutes.

The first K2 event might have been calculation about total amount of oil in engine.
[3.5L in dry, 2.6 after oil change with filter, 3-3.2 after drain all oil with pump removed.]

There is a huge risk if filling engine from top with 2.5 L + only 1L in oil tank. The oil tank feeds the crank and top direct via filter. Tank can run out of oil until scavange pump fills  tank so level increase.

I think I did that mistake, I saw oil lamp warning during 5 sec despite almost 2000rpm.
Tank was empty, gave it 1.5 L and back in business. I had to remove oil later when tank started to overfill.

To be safe, start bike and let it idle warm until oil level has stopped to drop, stabilized and increase.

Way too easy to ruin a good engine :(
« Last Edit: November 25, 2019, 04:16:22 AM by PeWe »
CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline web

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Re: Terry's NEW Redneck CB750 rebuild. The "Swamp Rat". Too soon? Nah..........
« Reply #473 on: November 25, 2019, 05:11:02 AM »
Oh man, that sucks!

Around here it's very different whether you're stuck on the roadside with a car or a motorcycle. I've had my share of things happen in 3/4 million km.

If it's the car, people pull over only if there is wreckage, carnage, excitement. And then they can be all bossy like they're the police and fire brigade combined, trying to control the situation rather than be helpful. I got the cops called on me once by people who misinterpreted the situation around a fender bender and felt the need to completely overrule my conversation with the other party (who was at fault). Srsly wtf, be helpful or mind your own business. But if there is no excitement to be had, you are ignored. Hundreds of cars pass by without batting an eyelid, if you're just sitting there with the bonnet up.

With the motorcycle though - same as you. People pull over all the time in a genuinely caring and helpful way, whenever you're parked in an odd place. Often bikers in cars, other bikes, or others who appreciate the vulnerability of a bike wrt a car. Super nice. Breaking down with your motorbike is all it takes to restore faith in some humanity.

With that restored though, I hope the nose and bike heal well soon. It hasn't been your luckiest build ever, so far...

Offline SOHC4 Cafe Racer Fan

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Re: Terry's NEW Redneck CB750 rebuild. The "Swamp Rat". Too soon? Nah..........
« Reply #474 on: November 25, 2019, 09:04:14 AM »
That's a gut punch! She looks good and she will live again to fight another day.
1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold