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Author Topic: Maduncle has FINALLY got himself a CB750K  (Read 34675 times)

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Offline SOHC4 Cafe Racer Fan

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #150 on: June 01, 2016, 09:27:54 AM »
Quote from: Terry in Australia on May 31, 2016, 11:32:02 PM
I've probably got a pair here that you can have Cliff, freebies. Only problem is I'm in Adelaide until Friday, and my brother (in Townsville) died this morning, so I may have to fly up there on the weekend? Any K1-K6 sidecovers will fit, the badges on yours should be the early 750 Four script, and the diamonds are an amber colour, not red. (K1 only) Cheers, Terry. ;D

So sorry for your loss, Terry.
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"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)

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Offline maduncle

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #151 on: June 02, 2016, 01:59:24 AM »
Got paid this week so I splashed some cash on 4 into 1 and got the side cover badges, and another fuel cap, latch and petcock.

Had to go via eBay to get the tank stripes as they were out of stock on 4 into 1.

All this should help put a nice semi stock look on the bike.
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Offline maduncle

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #152 on: June 10, 2016, 09:48:59 PM »
Close now ...

My mechanic friend who has the bike has found that the oil pump was not pumping. When he pulled the pump an inspected it he found one of the plunger valves was stuck closed and not letting oil out (?).

So I sat down today and cut him a new oil pump gasket from gasket paper.

And thanks for that schematic too Terry, we will be checking for part number 2 in the lower case to make sure it is there.
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Online Terry in Australia

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #153 on: June 10, 2016, 11:04:37 PM »
No worries Cliff, the gasket set I gave you comes with an oil pump gasket, but anyway, cutting one from gasket paper should be fine. Make sure that the three O rings are in place as well, or once again, you won't have any oil pressure. Cheers, Terry. ;D
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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 maduncle

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #154 on: June 11, 2016, 03:37:53 AM »
Quote from: Terry in Australia on June 10, 2016, 11:04:37 PM
No worries Cliff, the gasket set I gave you comes with an oil pump gasket, but anyway, cutting one from gasket paper should be fine. Make sure that the three O rings are in place as well, or once again, you won't have any oil pressure. Cheers, Terry. ;D

Thanks Terry - I will be checking for all those O rings during assembly for sure.
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Offline maduncle

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #155 on: June 15, 2016, 03:48:32 AM »


This makes me happy.

Straight to 70 on start up.

All good for the Roadworthy Inspection now - although the brand new neutral light switch now does not work. It will pass anyway (its who you know ...)

Then a club permit and then on the road - should be out there within a week (fingers crossed).
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Online Terry in Australia

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #156 on: June 15, 2016, 04:11:19 AM »
Well done Cliff, you don't need a neutral light for a roadworthy anyway, so you'll be fine. That's a good quality oil pressure gauge too, there are crooked sellers out there that flog cheap chinese air compressor gauges as oil pressure gauges, and the needles fly off first time out. Cheers, Terry. ;D 
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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 maduncle

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #157 on: June 16, 2016, 03:30:44 AM »
Okay...

So why does the petcock rub up against the carbie throttle linkage and stop the throttle opening fully?

Is it a wrong tank/carbie model combination of parts?

Pretty sure the carries are fitted correctly - all the boots went on in order and lined up.

Not sure what to do to get a few millimetres more space between the back of the petcock and the carbies ...

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Online Terry in Australia

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #158 on: June 16, 2016, 03:50:07 AM »
That' a good question Cliff, the tank (I presume it's the one I gave you) is from a K2, it's a K2 frame, the carbs are K2, so I've got absolutely no idea why you'd have that problem. There is a little bit of slop in the standard engine mounts so the engine can be tilted back or forwards a little, but not to the point where the tank would stop the carb linkages for rotating fully.

Not having a close up pic to look at, I have no choice but to ask some dumb questions. Are you using the original carb mounting rubbers, front and rear? The carb mounting rubbers are numbered 1-4, 1 being on the left (alternator) side, and 4 being on the ignition side. In that order, the numbers will be on top of the rubbers, with the numbers closest to the cylinder head, not the carbs. If you're using the OEM airbox, the rubber snorkels should be rotated so that the airbox's two 6mm mounting screws are an easy fit, ensuring that everything is lining up properly.

With the carbs and airbox correctly mounted, and the tank rubbers in place, nothing should affect the rotation of the carb linkages. It's probably a good idea to go back and double check your work, and if you still can't nut it out, post a pic or two so we can see the problem, and not have to hypothesize. Cheers, Terry. ;D 
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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 maduncle

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #159 on: June 16, 2016, 03:58:01 AM »

Thanks Terry,

Checked all the rubbers - the new carb mount rubbers are on in the 1 to 4 order with the numbers facing up from alternator to ignition. The airbox screws were an easy fit, i fitted the airbox snorkels to the carbs on the correct angle to line up wit the airbag inlets then bolted the airbox in place. It is only a matter of a couple of a "poofteenth of an inch" clearance needed. Going to try shaving a bit off the back edge of the front tank mount rubbers to get the tank to move forward slightly (found that idea searching the forum here).

Wont be a big thing - just need to carefully check everything like you say.
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Offline BPellerine

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #160 on: June 16, 2016, 05:37:12 PM »
another dumb question ,correct petcock?bill
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Online Terry in Australia

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #161 on: June 17, 2016, 03:47:31 AM »
Yes it is Bill. Cheers, Terry. ;D
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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 maduncle

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #162 on: June 17, 2016, 05:49:35 AM »
Bit of a nudge, bit of a jiggle and all is good.

Close - but good.

Roadworthy next - then we ride!
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Online Terry in Australia

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #163 on: June 17, 2016, 06:51:19 PM »
If you get it registered before next weekend I'll be up for a ride with you Cliff! ;D
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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 maduncle

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #164 on: July 03, 2016, 04:01:05 AM »
Update time.

Well, got the RWC and got the club permit done for the bike.

But then the starter motor clutch went and threw a hissy fit, so it took a wee while to get that sorted.

As of this evening - I need a stator cover gasket and a gear change cover gasket to replace the two new ones damaged when fixing the dodgy starter motor clutch assembly, then I am on the road.

Hopefully I can find those gaskets in the next day or two so I can ride this bike next weekend.

Then I can get stuck into the CB450K1 I bought last week...
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Re: Maduncle has FINALLY got himself a CB750K
« Reply #165 on: July 03, 2016, 05:59:45 AM »
Well done Cliff, I'm going to take Mike's Café Racer for it's first ever "test ride" next Saturday, maybe I'll see you on the road. Cheers, Terry. ;D
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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 maduncle

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #166 on: July 19, 2016, 04:30:08 AM »
Update time.

Well, after enjoying two good short rides on Sunday and getting a feel for just how well this bike goes ...

... it stopped going. It ran the battery down and was not charging.

So with an experienced motorcycle electrics friend beside me, we went looked into the problem this evening.

I am not going to share the photo of what we found under the sprocket cover - it would put you off your dinner for days.

Needless to say - since I failed to ensure that the harness from the stator could in no way drop onto the sprocket, that is exactly what happened. It chewed 3/4 of the way through the harness, chomped two yellows, the green and the white to pieces.

Well - after an hour of careful repair work, we had it back together and running well (and charging well) again.

My next challenge is to find a good condition starter clutch. I am on my second clutch now and the starter still chatters and fails to grip when the engine is cold, I am confident it is all installed correctly - just seemed to have ended up with two well worn ones.

Unless someone has a tip on making sure your worn starter clutch works?
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Offline maduncle

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #167 on: July 20, 2016, 04:11:29 AM »
Wow...

WOW!!!

I went out tonight on the first group ride with the bike, put 50km on it through the mean streets of Melbourne.

It was a little hard to start on the slipping starter clutch gear wheel but after a few attempts I got it going. After the first five minute idle it started at the touch of the button each time the rest of the day. It is idling a little high, I tried adjusting it on the run but the adjuster screw is loose (worn spring?) I will look at that tomorrow.

But - damn this thing pulls! You slip from first to second and then find that sweet spot in the throttle and let it rip, it has such rapid acceleration, and such a growl from those pipes - I love it.

So a replacement used low mileage starter clutch gear wheel is on order, easy swap out. Apart from that all I need to do now is an oil change in 50km and then keep riding!

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Online Terry in Australia

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #168 on: July 20, 2016, 04:19:10 AM »
Well done Cliff, and have fun on that bike in the mean streets of Melbourne! (where are those mean streets, by the way?) ;D
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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 maduncle

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #169 on: July 20, 2016, 04:45:10 AM »
Quote from: Terry in Australia on July 20, 2016, 04:19:10 AM
Well done Cliff, and have fun on that bike in the mean streets of Melbourne! (where are those mean streets, by the way?) ;D

Cheers mate - some of those Brunswick back streets are a bit mean, particularly at night.
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Online Terry in Australia

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #170 on: July 20, 2016, 04:54:49 AM »
I thought Brunswick was full of yuppies? ;D
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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 maduncle

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #171 on: July 21, 2016, 03:09:40 AM »
Quote from: Terry in Australia on July 20, 2016, 04:54:49 AM
I thought Brunswick was full of yuppies? ;D

Yuppies?

That was like 25 years ago mate.

Now you can't move for all the bearded, flannel shirt wearing latte sipping hipsters.
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Online Terry in Australia

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #172 on: July 21, 2016, 03:24:57 AM »
Quote from: maduncle on July 21, 2016, 03:09:40 AM
Quote from: Terry in Australia on July 20, 2016, 04:54:49 AM
I thought Brunswick was full of yuppies? ;D

Yuppies?

That was like 25 years ago mate.

Now you can't move for all the bearded, flannel shirt wearing latte sipping hipsters.


Ha ha, they're probably the sons of the yuppies from 25 years ago, but I'm still wondering what's mean about them? ;D
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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 maduncle

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #173 on: July 21, 2016, 04:08:29 AM »
Quote from: Terry in Australia on July 21, 2016, 03:24:57 AM
Quote from: maduncle on July 21, 2016, 03:09:40 AM
Quote from: Terry in Australia on July 20, 2016, 04:54:49 AM
I thought Brunswick was full of yuppies? ;D

Yuppies?

That was like 25 years ago mate.

Now you can't move for all the bearded, flannel shirt wearing latte sipping hipsters.


Ha ha, they're probably the sons of the yuppies from 25 years ago, but I'm still wondering what's mean about them? ;D

They won't share their lattes.
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Online Terry in Australia

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #174 on: July 21, 2016, 04:12:14 AM »
Those bastards! ;D
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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)
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