Author Topic: Teds new project a CB500 K1 mostly version 0.5 circa 1972.  (Read 75035 times)

Online McCabe-Thiele (Ted)

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Re: Teds new project a CB500 K1 mostly version 0.5 circa 1972.
« Reply #780 on: May 12, 2024, 02:24:53 PM »
I removed the left side top silencer, loosened the clamps on number two front pipe to find a nice stress free position. Lightly nipped up the clamp on number two port.
I removed the bracket from the upper silencer then re-fitted it as previously. When re-attaching the bracket I could see that the top slot needed a little opening up at the top of the slot to allow the upper exhaust to drop down a tad. A small amount seems to make a difference at the tail pipe end. It all went together well except when clamping the hanger bracket it wanted to pull out of the balancer joint. The Delkevic top bracket has a half circle reinforcing plate attached to the bracket. If I fully tighten the hangar bolt it starts to tip the rear of the silencer.

I'm chewing over the options - might try and fit a sawn in half washer to keep it all flat at the same angle .

Update Just used a slightly thicker stainless washer that has a slight dished shape, fully tightened the nut on the bracket all stayed in place.
« Last Edit: May 12, 2024, 02:48:52 PM by McCabe-Thiele (Ted) »
Honda CB500 K1 (new pit dug out ready)
Honda CB400 four super sport (first money pit)
Link to my full restoration http://www.sohc.co.uk/index.php/topic,23291.0.html
http://forums.sohc4.net/index.php/topic,151576.msg1731556.html#msg1731556

Offline Johnny4428

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Re: Teds new project a CB500 K1 mostly version 0.5 circa 1972.
« Reply #781 on: May 13, 2024, 09:42:29 AM »
Ted that all sounds exhausting! (somebody had to do it). Sounds like you’ve done a good job there bike is starting to look like it’s about ready to roll. It’s a shame when parts are made for a specific model that they don’t fit correctly, especially going to the expense and trouble to produce a quality replacement.😡
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1961 Matchless G3
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1978 Honda CB550K3.
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1975,1980,1984,1986 Honda C90’s
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Offline Nurse Julie

  • 1977 CB550/4 Mongrel Brat. 1974 UK 500/4 K1. Honda CD250u.
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Re: Teds new project a CB500 K1 mostly version 0.5 circa 1972.
« Reply #782 on: May 13, 2024, 10:04:14 AM »
That's strange that the fitting was awkward Ted. We fitted a set of the Delkevic 2 weeks ago to a customer's bike and they fell on with no problem at all. The chaps on the USA forum that have bought them also had no issues fitting them. As with all 4 into 4 systems though, even OEM, they never just fall into place without a little bit of a jiggle.
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Online McCabe-Thiele (Ted)

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Re: Teds new project a CB500 K1 mostly version 0.5 circa 1972.
« Reply #783 on: May 13, 2024, 01:06:50 PM »
I have a theory Julie that the issue on the left side upper exhaust might have been related to the rear foot peg bracket end angled section just looking very slightly different on the bolt hole end section from the right side. I suspected wrongly that the right side was slightly mis-shapen due to the previous 4:1 system fitting.

The one on the right side that fitted perfectly had a distinctive angle at the tip, the left side hanger was not a mirror image - it was visually slightly different a smoother curve.

One advantage for me was by fitting the bracket to the upper exhaust in situ with the balancer pipe connected I could see where the bolt need to align with the bracket when I slipped it in place. This meant I only needed to file it once as I could see where the slotted hole needed fettling. I did not need to elongate the angled slot just take a small amount of metal from the middle top of the slot.
« Last Edit: May 13, 2024, 02:58:34 PM by McCabe-Thiele (Ted) »
Honda CB500 K1 (new pit dug out ready)
Honda CB400 four super sport (first money pit)
Link to my full restoration http://www.sohc.co.uk/index.php/topic,23291.0.html
http://forums.sohc4.net/index.php/topic,151576.msg1731556.html#msg1731556

Online McCabe-Thiele (Ted)

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Re: Teds new project a CB500 K1 mostly version 0.5 circa 1972.
« Reply #784 on: May 13, 2024, 08:24:30 PM »
Initially I plan to retain the standard points system then change over to electronic ignition if the bike  runs ok again.

It must have taken me an hour of checking the points gap, checking the F mark for the bulb to light up in the hope that my static timing is good enough on 1/4 & 2/3 can't believe how rusty I am at setting points. I will use my strobe when it's running.

It would be great if the two small pegs for opening the points with a screwdriver were even close to the recess on the other side of the contact breaker.
Presumably I could move the backing section to achieve this. I assume  some of this is linked to the brand of ponts fitted as well. There is no pitting on the contacts they look very new in terms of use.

.500 ponts plate by Macabe Thiele, on Flickr
Honda CB500 K1 (new pit dug out ready)
Honda CB400 four super sport (first money pit)
Link to my full restoration http://www.sohc.co.uk/index.php/topic,23291.0.html
http://forums.sohc4.net/index.php/topic,151576.msg1731556.html#msg1731556

Offline davidcumbria

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Re: Teds new project a CB500 K1 mostly version 0.5 circa 1972.
« Reply #785 on: May 16, 2024, 07:28:52 AM »
Your back plate securing screw is nicely in the middle of its adjustment range👍
500/4 in 79. No bikes for 30 years. 750/4 in 2013, 550/4 in 2023. Also own  R1100GS, RD350LC YPVS , Triumph Street Triple, Yamaha XT250

Online McCabe-Thiele (Ted)

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Re: Teds new project a CB500 K1 mostly version 0.5 circa 1972.
« Reply #786 on: May 16, 2024, 09:51:10 AM »
I'm going to dismantle the points plate to clean it up. Ken is sending me some proper screws to replace the Allen Key Headed ones to prevent overtightening.

I agree David the main three back plate screws are pretty central. It the CB ones that are at the extreme end, I will see if there is a make on them when I strip down the plate.

Honda CB500 K1 (new pit dug out ready)
Honda CB400 four super sport (first money pit)
Link to my full restoration http://www.sohc.co.uk/index.php/topic,23291.0.html
http://forums.sohc4.net/index.php/topic,151576.msg1731556.html#msg1731556

Online McCabe-Thiele (Ted)

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Re: Teds new project a CB500 K1 mostly version 0.5 circa 1972.
« Reply #787 on: Today at 02:02:20 PM »
Yesterday I fitted the correct screws that Ken sent me to the points base plate - I set up the static timing using the bulb method as per the Haynes Manual it took me the best part of an hour to end up with the right points gap range & set the timing something close to where it ought to be.  I cranked the engine over before fitting the plugs - oil light went out as it should.
I filled up my temporary petrol tank - first bonus was there was no float flooding when I opened the petrol line tap.
Cleaned & fitted the PO's NGK D7EA plugs.
I made sure I had the correct HT leads after my 400 fiasco.

tbh it took a bit of cranking before she first fired up then all was good - no nasty noises - she sounds so different to my 400.
Next job is the dynamic timing, check the camshafts for oil splash then tweak the carbs if needed as so far only done a bench sych.

Honda CB500 K1 (new pit dug out ready)
Honda CB400 four super sport (first money pit)
Link to my full restoration http://www.sohc.co.uk/index.php/topic,23291.0.html
http://forums.sohc4.net/index.php/topic,151576.msg1731556.html#msg1731556

Offline Laverdaroo

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Re: Teds new project a CB500 K1 mostly version 0.5 circa 1972.
« Reply #788 on: Today at 02:03:47 PM »
Yay, well done Ted, cracking news


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2002 VFR800 VTEC (The Beloved)
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Offline Bryanj

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Re: Teds new project a CB500 K1 mostly version 0.5 circa 1972.
« Reply #789 on: Today at 02:14:42 PM »
Glad to hear shes back running Ted

Offline Laverda Dave

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Re: Teds new project a CB500 K1 mostly version 0.5 circa 1972.
« Reply #790 on: Today at 03:26:20 PM »
Well done Ted  :). Crack open the bubbly whilst you trawl Ebay for that CB750 Project you've always promised yourself (or a Maico  ;))
Happiness is turning on the fuel and the carbs don't flood  :).
Post some photos of the complete bike wearing it's newly painted suit 8)
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Online magpie114

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Re: Teds new project a CB500 K1 mostly version 0.5 circa 1972.
« Reply #791 on: Today at 03:56:56 PM »
Good news, you must be itching to road test it.
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Offline Spitfire

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Re: Teds new project a CB500 K1 mostly version 0.5 circa 1972.
« Reply #792 on: Today at 04:28:31 PM »
Such a deeply satifying moment when it comes back to life, now get it on the road.

Cheers

Dennis
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1977 CB750F2 In bits

1964 BSA A65R In bits

Offline taysidedragon

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Re: Teds new project a CB500 K1 mostly version 0.5 circa 1972.
« Reply #793 on: Today at 05:31:11 PM »
Well done Ted. Nearly there now.  8)
Gareth

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Online McCabe-Thiele (Ted)

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Re: Teds new project a CB500 K1 mostly version 0.5 circa 1972.
« Reply #794 on: Today at 05:51:47 PM »
Not sure about elsewhere in the UK, here in Derby it's still pretty cold for a long period of bike work.
It was only 58 deg F in there today - well below my comfort zone tbh.

I've decided to set the carbs up using a Morgan Carbtune Pro 4 that I ordered today so the tank will not be fitted until it's running with balanced carbs. It's been a relief to have it running as many here can empathise after a full strip down.
To spur me on I would like a couple of weeks of warm sunny weather.

I've have quite a lot of backlogs to clear in the house & garden before I take the 500 out for a run I will post some pics when the tank & side panels are in place.




 
Honda CB500 K1 (new pit dug out ready)
Honda CB400 four super sport (first money pit)
Link to my full restoration http://www.sohc.co.uk/index.php/topic,23291.0.html
http://forums.sohc4.net/index.php/topic,151576.msg1731556.html#msg1731556

 

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