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Messages - sye
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76
« on: August 14, 2020, 08:25:29 AM »
Sye... whilst power divided by volts indeed gives amps it’s not the full story when resistance is then bought into the equation. Your post fails to explain why lamps brighten as you increase the voltage - which you’ll know from 1st hand experience. The current (A) actually increases as you increase the voltage through the filament...the power rating of a lamp will be only be valid at the stated voltage .
Anyways, please don’t take my word on it, but rather google the explanation.
Yea, Deltarider, horses for courses. I’m gonna take a punt on the LED headlamp bulb, and will report back in due course. They annoyingly come in pairs... so if fail early I’ll have a spare 😂.
Trig... you say you’ve got LED replacement ‘globes’.... how are they performing?
You are right of course, the power output does indeed increase with revs, sometimes to 14v. The headlamp filament is a crude affair that glows white hot by the heat created by the current passing through it. The higher the voltage, the brighter the lamp. If the voltage gets too high the lamp will blow. LED is deffinately the way to go.
77
« on: August 13, 2020, 02:56:01 PM »
Amperage drops as voltage increases.
120w @ 12v = 10.0a
120w @ 120v = 1.0a
120w @ 240v = 0.5a
78
« on: August 13, 2020, 08:29:30 AM »
Then add in the reliability of LED factor...
Maybe you can explain, I see quite some cars that have only one side lit (DRL). I would not expect to much reliability of Chinese products. I myself will not buy any product from China, be it for more than one reason... The tabulation of ampères in reply #5 is all too simple and may lead to confusion. Riding we'll see a higher voltage than the theoretical 12V, which implies less current drawn. The 15A main fuse has proved to be quite capable of dealing with the 55/60 Watts H4 on mine for the last 40 years...
Furthermore there's more needed to have a good vision (beam pattern) than just replacing an incandescent bulb by a LED. Leds need their own, special projectors.
Here's a question, I have not solved yet. Due to a lame PA switch, I sometimes had both filaments in the H4 on. On entering a tunnel, I would detect this by the lit blue idiot light. I've fixed the PA switch some years ago. But te question remains: why did it not blow the 15A fuse?
55 + 60 = 115W. 115W @ 12v = 9.5A. 115w @ 14v = 8.2A.
79
« on: July 11, 2020, 02:34:21 PM »
That's the correct one for a 500 K0 - K1 and the same as mine which works fine. Picture from CMSNL, part number 45500-341-671.
80
« on: June 24, 2020, 01:12:38 PM »
Tsubaki chain?
81
« on: June 16, 2020, 12:47:08 PM »
82
« on: June 11, 2020, 05:08:09 PM »
Bridgestone had aluminium barrels, chrome plated bores, oil injection and rotary valves in 1967.
Here's a couple of mine, 67 GTR350 and 67 DT175 Hurricane.
83
« on: May 30, 2020, 01:39:22 PM »
Nail, magnet, job done 👍
84
« on: May 30, 2020, 01:37:13 PM »
I think you can claim classic bike parts duty back from HMRC but not certain. I imported a vintage Bridgestone from the USA some years ago and didn't pay any duty and 5% Vat. Worth looking into.
85
« on: May 26, 2020, 11:23:50 AM »
Thanks for all your input so far :-)
The story goes that the first owner was in Germany in ‘73 and special ordered it from the factory in this colour. It was delivered new in the UK. Other than that yes I agree it’s not a UK colour. If I were to restore it (doubtful) I’d change it. As I say I think it’s better to enjoy as is, surface rust and all!
I wonder if the original purchaser was in the army at the time. I bought a new car in 1972 whilst stationed over there. Built to UK spec in Paris and delivered to Celle.
86
« on: May 18, 2020, 08:48:16 AM »
Ash, this company do isocyanate free 2k paint and will supply it in aerosol too. Bloody expensive though, they charge £10 delivery for one can. https://www.jawel.co.uk/
87
« on: May 15, 2020, 05:26:17 PM »
Are you using led bulbs?
88
« on: May 15, 2020, 05:03:32 PM »
Don't know the answer to that question but a quick search says you can. I'm sure someone on here knows for sure.
There are paint specialists who will supply you with 2k in a can. Search for one and ask them, they will know.
It's not cheap at around £20 a 400ml can, so be sure.
89
« on: May 15, 2020, 04:41:12 PM »
It needs to be 2k lacquer and be allowed to dry for at least 2 weeks before allowing petrol anywhere near it.
The stuff we buy from the likes of Halfrauds is not suitable.
You can but 2k in an aerosol if you do a search.
90
« on: May 02, 2020, 02:51:21 PM »
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