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Messages - AshimotoK0
1
« on: July 26, 2024, 09:12:33 AM »
Bob closed the business early last year, due to very poor health and sold off all his stock and equipment.
Shame .. he was poorly when I 1st bought off him yonks ago though Julie so it doesn't surprise me that he's packed it all in.
2
« on: July 26, 2024, 07:47:13 AM »
I suppose this Yamiya seat is likely to be the best aftermarket seat around, if their 750K0 duck-tail seats are anything to go by.
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3
« on: July 25, 2024, 10:51:15 PM »
That's a bummer Dave ..
I remember contacting Bob Dillinger near Stroud who made (still makes?) the seat covers for DS, as the ones he sold direct were a bit dearer than the DS price. He told me DS hammered him down on price so much that inevitably he had to cut corners.
Interested to know how the logo application went ... if it turned out a bit sub-standard don't worry as it's probably more to do with the deep grain pattern or stencil than your workmanship. I probably have another spare stencil if you end up getting a replacement from DS.
4
« on: July 23, 2024, 11:21:20 PM »
Very easy to damage the end on the tensioner .. I thought I had damaged mine when I wrongly assembled mine last year but it turned out OK in the end. At the time Ken (Oddjob) who was on here had six spares ... pretty sure he must still have at least one.
5
« on: July 21, 2024, 10:38:41 AM »
Seen that mini on the road years and years ago around East Yorks.. my sister in-laws brother had one in the late 1960's ...possibly the same one.
6
« on: July 19, 2024, 08:21:17 PM »
The original gear pedal was tubular in construction Mo and bent easily gouging the generator cover if the bike fell over. Both items are pretty rare to get hold of. I managed to get a NOS cover and I had an original gear pedal rechromed.
I wouldn't worry about it too much ..only anoraks like me would notice. Your later cover is worth a few bob anyway as all of the 450/500T covers get easily damaged and fetch a good price if unscathed.
One thing you do have is the correct 'Elephant' horn which is a rare item to find in decent nick
7
« on: July 19, 2024, 10:13:49 AM »
That's a lovely example Mo.... someone did a really good job on the resto.
Only things I can see non-standard (apart from indicators which are a really sensible addition) are the gear lever and alternator cover. I think the silencers are DS pattern ones .. how do they sound?
8
« on: July 18, 2024, 11:29:28 AM »
I think that means the crank will have to be split to replace those bearing retainers..... a bit like splitting the crank on a triple 2 stroke to replace the oil seals
Yes correct ... Graham Curtis has the press and fixtures to do it. I know he has done 4-speed bomber cranks as he did mine ..not sure he's done a 5-speed but he's deffo done CB350Ks/G5's that are similar in design. He always cleans out the sludge traps in the crank flywheels as they preferentially retain heavily compacted debris particles in preference to the centrifugal oil filter. He has a real bee in his bonnet about it.
9
« on: July 16, 2024, 06:35:32 PM »
My friend Graham Curtis rebuilds cranks ... he did my CB450K0, CB72 and S90 cranks.
10
« on: July 14, 2024, 01:54:49 PM »
Did you keep those carbs Ash or did you leave them to dissolve back into the ground!
Amazing to see how people allow personal possessions that cost a lot of money back in the day to sit and rot. I was always taught to save up for things I wanted and when I got them to look after them. This thinking especially applied to my coach trimming tools, they were my living and eventually the same applied to my drawing pens etc when I became a design engineer. I could never leave bits of engines out in the elements or sitting in sheds without some level of protection be it grease or in sealed containers.
I seem to remember they did actually yield some decent bits like brassware, piston slides and some rubber parts etc . After all only 600 odd miles from what I could gather. Mick Taylor (kettle738) actually got the engine that the carbs were from, which the guy had kept inside of his house and from memory it was just covered in fluff and dust with no plugs in it. I think Mick sold it to a bloke in Lincolnshire. We found a receipt from the late 1970's from 'The House of Wheels' in London (was it Leyton?) and the guy had bought a lot of stuff off a crashed 400 they had. ... I found the kickstart off it that was pristine and fetched a fair few bob  and 'Varnish Blue' side panels, which are now on my own 400.
11
« on: July 12, 2024, 11:30:41 PM »
See my other post on my Bomber Dave ... these carbs have to be worse than yours albeit off a 600 mile only bike!
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12
« on: July 12, 2024, 10:53:45 PM »
Great story Ash. Got to admire your dedication to the cause and spending so long finding parts worldwide that are so rare.
How do you find the leads to these bikes and us this the same guy who had the CB250 (was it a G5?) that you found in a shed a couple of years ago?
I wish I could help you with the fasteners you are looking for but the only advice I could offer (and you have probably explored this anyway) but DSS has a Bomber in his museum, would this be able to offer some details or is his Bomber a later one?
Looking forward though to seeing some photos of this build, it's going to be a good thread 👍
Yes Dave... as well as the Bomber in bits, I got my '64 CB72 also in bits, '69 G reg CB250K0 and another H reg in bits, a complete Bomber (I sold to Roy on here), 305 mile only CX500 and a 2k mile CB250G5 all in a delipidated shed, with it's roof caved in.. It was mid winter and the council were moving in to clear the property the next day and sadly I had to leave behind another Bomber, CB77, CB250T, 250 G5 plus CJ engines, forks, frames etc .. all in bad condition but broke my heart to leave them, Crawley is a long way from East Yorks and I felt another trip might have finished me and the van off. The guy (a passed away Chinese engineer in his 80's) also had a house full of model planes, dozens and dozens of VHS/Betamax recorders, Hi-fi, etc etc. God knows what was in the locked main bedroom and loft. I did OK out of it so no complaints at all really. Look at these 400 carbs I got from there ... they were from a 600 mile only write off .. you could say badly stored ! [ Guests cannot view attachments ]
13
« on: July 12, 2024, 10:41:16 PM »
Might take me a while to digest that!
Would one side still spark and one not if the condenser was no good?
There are condensers for each side but two in a common package on the Honda twins
14
« on: July 12, 2024, 09:53:51 PM »
I feel your pain .... but keep yer pecker up Dave.  walk away from it for a few days and then go back to it. It will be one hell of a classy 400 when finished and you should be proud !
15
« on: July 12, 2024, 09:46:57 PM »
No, I haven’t checked the condensers, apologies for silly question but will they affect spark?
I did remove the wires from the points and manually spark it to ground as I think Bryan has suggested, I still had no spark then.
Condenser is essential for a decent spark. For us Anoraks out there:  The capacitor (called a condenser up to about 75 years ago) forms a resonant circuit with the inductance of the coil. While the points are closed, current (and the associated magnetic field) builds up in the coil. When the points open, the current is diverted to the capacitor due to the collapse of the magnetic field. The result is a sinusoïdal rise in voltage across the capacitor, which voltage is also across the primary winding of the ignition coil. This produces a large voltage across the secondary (which is connected to the spark plug) igniting the fuel mixture in the cylinder. The width in time of the voltage pulse is determined by the inductance of the primary of the coil and the capacitance of the “condenser”. The values are chosen for optimal ignition. If you remove the capacitor, the voltage will try to spike higher but will be limited by arcing at the contacts. But in addition the width of the resulting voltage pulse at the spark plug will be much much shorter and the spark energy much lower. This can result in inefficient ignition (or none at all). Of course, the contact arcing is also undesirable but that’s not the primary reason for the capacitor.
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