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Messages - magpie114

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16
Project Board / Re: Project CB350F
« on: April 09, 2024, 08:01:02 PM »
Finally got the cylinder head and cover installed and valve clearances set. Unfortunately when I initially started to fit the head I found the original cylinder/head dowels were slightly deformed and far too tight in the cylinder as I tried to fit them. I’d forgotten that one of them in particular took an awful lot of effort to remove during disassembly and so I had to send for new cylinder/head dowels. Better to do it right but it was a frustrating wait. I now need to cleanup and polish the tappet and crankcase caps, can’t say that I’m looking forward to that job!

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I think I’ve got the harness routing figured out and I now need to decide whether to try and fix the original coils (Ashe's fix) or replace with after market versions - not sure which way to go yet. The chrome on the horn is fairly good and doesn’t need replating so I’ve assembled that with the ignition switch and bracket (thanks Ian) in place of the handlebar mount that came with the bike. The left hand handlebar switch has cleaned up ok but the right hand switch has beat me so I’ve ordered an aftermarket version from DSS.

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Phil at Full Circle Wheel Building emailed this morning to say that he would build the rear wheel tomorrow morning and hopefully I’ll get that back on Friday.

17
CB350/400 / Re: Buying large amounts of parts from yamiya or impex
« on: April 08, 2024, 10:11:18 AM »
Fowlers of Bristol are good on parts supply as well if you are using postal
+1 Have used Fowlers Parts for years, great postal service.


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18
CB500/550 / Re: Carb Cleaning Tips?
« on: March 28, 2024, 11:26:44 PM »
Well I’m surprised it’s freely available although it does say for professional use only.


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19
CB500/550 / Re: Carb Cleaning Tips?
« on: March 28, 2024, 08:18:19 PM »
Many years ago I used to mix relatively large quantities of HF with other acids to make a reagent for etching certain types of stainless steels. Head to foot PPE in a room with fume extraction and a shower activated in an emergency by stepping on a footplate. Highly corrosive and toxic.
I didn't realise it was used in alloy wheel cleaners, I guess (hope) its in a low concentration.

Alan

20
Project Board / Re: Project CB350F
« on: March 28, 2024, 02:23:57 PM »
The before & after photos of the electrics behind the side panel look inpressive - all those now homeless Arachnids good work!
Just spotted a mistake though, I’ve fitted the black regulator cover the wrong way!


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21
Project Board / Re: Project CB350F
« on: March 27, 2024, 09:28:01 PM »
Due to various commitments, progress has been sporadic to say the least but now I’ve got a clear spell and hopefully I can get upto speed.
Today I fitted the pistons and barrels which have been rebored +0.5. The pistons have been individually identified to each cylinder by Trigger. Although I was a little apprehensive about doing it on my own, it was surprisingly easy and straight forward. The bores had been coated in Graphogen and starting with the two central pistons I just took my time to squeeze each ring in turn with my fingers allowing the barrels to slide down. Then I turned the engine to raise the outer pistons a little before repeating the process. Tomorrow I’ll fit the head and camshaft

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I also fitted the powder coated air cleaner/battery box and associated electrics which have cleaned up well. The regulator point gap was 0.3mm as specified. Forward and reverse continuity tests on the rectifier checked out ok.

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The HT leads are in poor condition and one of them can be rotated in the coil so I’m going to see if they are repairable following Ashimoto’s fix.

   
The sprocket studs were pretty well stuck in my hub but they did come out in the end with the application of some WD40 and I left it for a week but kept giving it another spray whenever I was in the garage (daily!).

The sprocket studs finally did come out after applying more WD40 and some heavy blows with a lump hammer.

I’ve started polishing the clutch cover using a Dremel with the plastic bristles recommended by Ken. The cover was heavily pitted and has started to come up well but needs a little more work. Its strangely boring but addictive at the same time!

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22
CB500/550 / Re: Re-chromed Silencer
« on: March 23, 2024, 05:23:56 PM »
Great job on the rack, looks neat and sturdy
Quality chrome was recommended to me by the zinc plater I used recently. I’ve a lot of parts to get plated and may use them myself.


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23
sort of still on topic, we had problems with the condensate liquid eating through plastic pipe as it is very acidic. anyway, i came across a product called condensulate in a 10m coil, so no leaky joints
Recently had exactly the same problem. The pipe in our house runs behind the plaster board between the kitchen and bathroom. The joints were attacked by the acidic condensate and only found out when a patch appeared on the bathroom wall. The studding and insulation were soaking wet. I’ll check out condensulate,
sounds like the perfect solution.


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24
Project Board / Re: Project CB350F
« on: March 17, 2024, 07:54:13 PM »
The bottom end is back together again and installed in the frame. I've replaced the cam chain, after my blunder, with an endless chain courtesy of Ken. The front engine bolts (M10 x 74) which were missing from the bike are discontinued but got some longer bolts at the Scottish Motorcycle Show yesterday. They will need cutting to length to make sure that they don't hit the oil gallery. Decent show, had a look around the classics displays in the morning but only saw one Honda 4 SOHC, looked quite nice.

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I was going to fit the alternator today but had forgotten that the stator wire connectors were burnt. I can't see any visible signs of damage or deterioration on the stator itself and I've checked the resistance and continuity to ground which are ok. I'll solder new connectors and adjacent wiring which is fairly crispy. Seems from posts on here that the stators are generally reliable. Also one of the screws securing the inner field coil has been butchered and will need drilling out - so not quite sure what's been going on there. I've got an Electrex harness to fit later in place of the original which is showing abuse, wear and tear plus a few "modifications".

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I'm sending the rear hub to Full Circle Wheel Building this week. I've tried to remove the studs from the sprocket to fit into a new one, but they are stuck fast. Going to try again with some heat. I've screwed nuts on the ends to protect the threads but I'm concerned about damaging them as it seems they aren't available.

25
CB350/400 / Re: Alternator loom clip
« on: March 13, 2024, 07:39:05 PM »
Due to shape probably easier with a couple of pics

Alan

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26
Anorak's Corner / Re: Exhaust collars.
« on: March 12, 2024, 12:06:45 PM »
Great job and good price.


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27
Project Board / Re: Honda CB750K5 Restoration by Royhall
« on: March 06, 2024, 08:02:47 PM »
Great job. In the best colour as well.


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28
Where's My Old Bike? / Honda CB750K2 UMG 21M
« on: March 06, 2024, 07:13:13 PM »
I'm curious whether anyone here has my old blue 750 K2. I bought it new from Reads of Leytonstone in 1973, fitted with their own clip ons and rear sets. I sold it in early 1986 and from gov.uk tax was due 1 October 86. V5C issued 7 Jan 2016 and now listed as red.
I only have two very poor polaroids (remember them?) of it. Can't remember taping the grips up and no idea why I even did.

Alan

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29
Misc / Open / Re: DONATIONS
« on: March 06, 2024, 03:54:24 PM »
Well worth it


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30
Just gone down this road myself. Very difficult to accurately measure but I make the Honda version 7.9mm and Athena 7.82. Not sure whether this would make a difference and the Honda item (left) has a “cleaner” finish.



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