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Messages - AshimotoK0

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4981
Other Bikes / Re: Honda C72/C77 silencers
« on: July 22, 2015, 09:33:20 PM »
Well You do get em... ..  from the Land of the Rising Yen ... pricey though!

http://page4.auctions.yahoo.co.jp/jp/auction/d169245737

You just need a nice 75 year old lady  to bring em back in her luggage .. like a certain member on here did  with a tank, front & Rear mudguards, clocks,tail-lamp and seat etc. !! :D With a little note in her handbag saying 'the parts in the suitcase are scrap parts for a motorcycle I am restoring in the UK'. you even get passenger assistance and all that, to carry em out of the airport if you are canny!

Ash


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4982
Announcements / Re: 'BITSA' Ralph Wright- R.I.P.
« on: July 21, 2015, 07:13:04 PM »
Wow what a shock . Lost for words really. Never knew he was seriously ill
RIP mate.
Ash

4983
CB500/550 / Re: 500 four on eBay
« on: July 17, 2015, 12:32:49 PM »
Sold for £4201.  And there's another one on eBay for £9250; a fully restored low mileage very early UK model.

The restored one looks like it is from CB Classic Motorcycles  ;)

Looks like our own lovely nurse is selling it to me ....   ;)

4984
CB350/400 / Re: 400/4 Brake Pivot Arm
« on: July 17, 2015, 08:17:25 AM »
I'm not really worried about the polishing, just wanted it nice and tight. Took it apart and some plonker PO had put copper grease in it. Anyways it's all sorted now, nice and tight and working a treat. I still think £70 is plenty of money for that job, I would want at least 3 for that, being a hard up Nurse and all that  ;D ;D ;D ;D ;D

I don't see how its sorted now Julie if there was play before. The hole in the alloy bit becomes oversize and the pin is loose usually because of the corrosion on the pin and alloy. Has anyone bushed the alloy arm one of these ?  I have looked at a few parts from PD engineering but they do seem a bit pricey plus the SS he uses is probably a weaker material than the original steel... I am sure this is OK due to safety factors designed in by Honda but on paper,a weaker part IMHO.

Ash

4985
Re: 'bikepusher' ..... Well me included peed him off a bit and TBH it was because I can't bear to see really nice bikes broken for parts, which is a bit hypocritical of me  really because deep down I know I have bought really nice parts off nice bikes which should never have been broken up.

He starts stuff pretty low and daft bu**ers pay silly money for tiny bits and he rubs his hands together with glee  but some stuff looks OK and goes for a reasonable price sometimes, like engines and wheels etc that he sells and the description is pretty honest.

I too need to track down Cruzinimage, as I want to buy from them directly and have them shipped within Japan.

Ash

4986
CB750 / Re: Top yoke D Washers
« on: July 13, 2015, 07:24:33 AM »
I just measured one that's been stripped of its original coating and it measures 2.3 mm thick

4987
Misc / Open / Re: Load resistor
« on: July 13, 2015, 06:06:07 AM »
Hi del,

I'm out of my comfort zone here; but as a confirmed tinkerer would be up for the below.... think if you grab a beer & go through it slowly it may turn up what you're after.

Until, of course, Ash simply tells you the 'number'...

Sorry can't be of more help,
Simon

http://www.ngineering.com/led_calculators.htm

The load resistor for a LED is influenced by the forward volt drop (FVD)of the LED and this varies for the different colours.For the first RED LEDs this was 1.8 volts  but its about 3.5 volts  for a WHITE one. So what you do is subtract the  FVD from the supply voltage and then use that voltage figure in OHMS Law to calculate the required series resistance. So for a WHITE LED and 12 v supply and say a 50 milliamp  desired current (0.050 A)  you get 12 - 3.5 v = 8.5v So, applying  Ohms law R=V/I   ... the resistor value comes out as  8.5/0.05 =170 Ohms.

However,it's not as simple as this,because  with with modern LED 'arrays'  they have multiple LED's embedded into the same device and connected in a series and parallel arrangement to optimize minimum power drop in the series resistor and also some even have integrated 'constant current' circuitry in addition to the LEDs to give a constant brightness irrespective of any supply voltage fluctuations (if you think about it a 12 volt  bike battery can reach 14v)

Best thing may be to just get an wirewound 'pot' (variable resistor) of say 100 Ohms and connect this in series with the LED and adjust it until you get the desired brightness then measure its value with a DVM and replace it with a fixed resistor. If you sent me a LED bulb I could easily do this for you as I have all of the gear to do it quickly.

Sorry about the long winded answer .. my kids/family have no interest whatsoever in anything like this so I have to pass the knowledge onto someone  :-[

4988
CB750 / Re: my 750k4
« on: July 11, 2015, 11:55:33 PM »
Here Ya Go..   Six quid each almost from Silvers ... what a rip off as they look like stamped out 'D' shaped  washers on my bike, not a machined component or are mine a bodged attempt by a PO?

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4989
CB750 / Re: my 750k4
« on: July 11, 2015, 09:11:26 PM »
Looks nice to me. If a K0 is worth as much as everyone goes on about I think it is worth it, if you hang on. Hope this is the right one  ::) :-[

http://www.ebay.co.uk/itm/1974-HONDA-CB750-ORANGE-/201386680528?pt=LH_DefaultDomain_3&hash=item2ee394e0d0

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4990
Other Bikes / Re: Indicator problem HELP
« on: July 11, 2015, 11:57:36 AM »
Fault finding always difficult at a distance. I have a main customer in Lithuania who uses my PC controlled test rigs and it's a nightmare fault finding. What you could probably sort out in 5 minutes if you were on site can sometimes take a week to get to the bottom of.

Ash

4991
Other Bikes / Re: Indicator problem HELP
« on: July 11, 2015, 09:53:29 AM »
You may have masked the underlying problem but if it works for you then that's great. An electronic unit will probably have its  own voltage regulator inside, which will be insensitive to any battery voltage/charging excessive fluctuations and the flash 'timing' will be governed by electronics rather than the standard electromechanical style flasher, which uses a capacitor discharge circuit into a relay.There is also the 'Signal-stat' version mainly fitted to USA bikes that uses a bi-metallic strip like the old Lucas car ones,which my have been less sensitive.

Ash

4992
CB750 / Re: CB750K2 Fork Springs
« on: July 10, 2015, 08:32:34 AM »
If you scroll right to the end of this Dropbox link (its a massive document) you will find several restoration  articles some from TANSA the VJMC magazine and I am sure there's one in there on fork tips for the CB750.

https://www.dropbox.com/s/anpzqn2r55f1o9k/CB750%20Mega%20Parts%20Service%20and%20More.pdf?dl=0

THE ARTICLE IS AT page no 1072 !!

Ash

4993
Misc / Open / Re: Engineering services prices
« on: July 10, 2015, 08:25:56 AM »
Thanks for that Roy. Prices sound good and I don't mind cash payment.

Usually it's only my wife who refers to me as Ashley...usually when I've done something wrong ;D

Cheers ... Ash

4994
CB500/550 / Re: RECTIFIER REPLACEMENT
« on: July 08, 2015, 09:30:56 PM »
It doesn't use a zener diode it uses a solid state voltage regulator but yes you can use one. This regulator adjusts the current in the field coil and therefore regulates the output of the three phase stator to match the battery charge condition. The later  Honda bikes use an integrated rectifier and regulator, the regulator parts being a solid-state equivalent of the electromechanical separate OEM item.  Regulator-rectifiers are cheap on eBay, just check its been tested  if its a used one.

Ash

4995
CB500/550 / Re: Refinishing exhaust flanges and collars
« on: July 08, 2015, 08:06:03 AM »
Yeah mine looked like that Al and they were also done by RS but in the early 80s when chroming was so much better than it is today.

However due to the rough casting it leaves small holes in the chrome and that's where the water etc gets in, pretty soon it's not looking quite as pretty.

Agree .. I got a NOS pair for one of my  250's and you can see, after shelf-only  storage for 30 odd years,  that there's slight rust build up in the 'valleys' where the throwing power of the plating process  is poorer and also where it's hard to reach with a polisher/abrader. I think we have to be fair to Mark at RS here, that this is a very  difficult item to plate and most (if not all ) chromers will struggle with this one, as no doubt Honda did back in the day, and they were starting with a freshly prepared casting.

BTW someone I work with says his dad is a chromer in Hull and that new EU regulation is coming in, which almost outlaws even the 'safer' conventional tri-valent chrome plating (unless you spend oodles on new fancy  plant). David Silver also told us that about 18 months ago. Perhaps, the only way round it is to stockpile the chemicals before the laws come in.

Ash

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