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Messages - twolitre

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16
British Bikes / Re: 5TA Clutch cables.
« on: September 23, 2013, 09:52:59 AM »
Thanks Rex,
The comment about "too heavy" came from a fellow member of my classic bike club, who seems to infer that the problem is MY incompetence.
I too thought that I could perhaps have bought inferior cables, but four or five over a period of seven years and from different suppliers???
 I shy away from making my own cables because many years ago when I was an apprentice, an extremely competent motor mechanic (with high professional qualification) replaced a brake cable nipple on a Triumph 5T I had. I can vouch that everything was spotlessly clean and the cable end was flared in the nipple properly. In any case the lower Clutch Cable nipple on the 5TA is too small to solder and must be cast on.
Never the less the impossible happened according to wetdog - the cable pulled through - gave me the fright of my life! And could have killed me!!
Incidentally, I am a qualified motor mechanic myself, though not very experienced with motor bikes.
I used to be able to sign myself - J.C.B. W*****, M.I.M.I (plus C & G qualifications etc). But I stopped paying subscriptions to the I. M. I. when I retired and surrendered the right to the letters.
Jim.

17
British Bikes / 5TA Clutch cables.
« on: September 22, 2013, 04:58:07 PM »
My Triumph 5TA "eats" clutch cables.
In 7 years it has pulled the nipple off one or other end of its clutch cable at least four times. Always replaced with a new cable.
I have been told the clutch is "too heavy".
The only response I can make to that is that if I lower the clutch spring tension any more the clutch slips. I can also point out that I can easily operate the clutch lever with 2 fingers and the cable tension is less than often required for front wheel braking in normal riding, and the front brake cable has never failed even once in that period. Is this a Triumph 5TA Malady. If so what is the cure?
I have already replaced the clutch springs with different poundage (recommended) ones from Len Craig.
I find it difficult accept that the tension on the cable is too much, particularly as the front brake lever needs a much harder pull in normal use.
Any comments or help gratefully received.
I perhaps should also mention that replacement cables have been from different suppliers and have always been well lubricated and fitted with minimum bends..
Jim.

18
Japanese Bikes / Re: Best handling bike that you have ever owned and why
« on: September 22, 2013, 10:03:25 AM »
Not even accidentally ?

Most of my 'moments' have been when i arrived in the middle of something faster than prudent - as judged in hindsight.

Like the road repair crew that had gravel (marbles !!) all over a corner, and hadn't put out the slow signs yet !!
Wonder how this bike handles if I put my foot down, and try and get around speedway style. ?
Yep, it worked.
Wonder if the designers tested for that......

Well......Yeah!
But never in the same situation twice with different bikes for a comparison! I do try to learn from my mistakes ;)
Jim.

19
Japanese Bikes / Re: Best handling bike that you have ever owned and why
« on: September 21, 2013, 11:43:11 AM »
Never been brave enough to ride a 'bike hard enough to find out! :-[
Jim.

20
British Bikes / Re: anyone interested in old cars as well as bikes ?
« on: August 05, 2013, 05:42:00 PM »
Yes Wetdog I am quite old and obviously old  does not mean stupid - it is more in line with experience.
So OK, I made another statement you can twist!
I probably should have said "sand yachts need AS MUCH STABILITY AS POSSIBLE". Knowing you woold milk it as much as possible. Of course I know they turn over AND I HAVE DRIVEN THEM TOO. Even with better steering I would hate to try a single rear wheel one!
Subject clised for me!
Jim.

21
British Bikes / Re: anyone interested in old cars as well as bikes ?
« on: August 03, 2013, 08:37:19 AM »
No Wetdog! I am not in any way allied to any three wheeler club or car. BUT I WAS driving when three wheelers became popular and drove most of them. Science apart - I know how they handled. I also admit that the Morgan was one on its own for cornering. But do not regard it as typical because of the low centre of gravity concentrated near the front wheels. Even the occupants virtually scrape their backsides on the road!
I do accept that the best thing I ever did with a Reliant Robin was to sail it to raise thousands of pounds towards restoration of the Chesterfield Canal.
Curiously though, as a combination of comfort and handling the very early aluminium bodied 2 seater soft top Reliant was far and away the best three wheeler I ever drove.
The Morgan had the handling - but comfort?? Sit the occupants six inches higher and it would probably go ar** over tit on corners!
Jim

Musing:- Sand Yachts need stability. I wonder why they ALWAYS have two wheels at the rear??

22
British Bikes / Re: anyone interested in old cars as well as bikes ?
« on: August 02, 2013, 08:47:49 AM »
is this where you have your conviction for the advantages of 3 wheelers from ? do you remember what it was called , was it a laural and hardey production

No it was not! It was a serious investigation into handling characteristics of road vehicles. Possibly by M.I.R.A. Who have a reputation of knowing about such things! :) Sorry, SCIENCE AGAIN - not an uninformed personal experience of a small selection of vehicles.
And I also know how to spell Laurel and Hardy!
Jim.

23
British Bikes / Re: anyone interested in old cars as well as bikes ?
« on: August 01, 2013, 10:31:49 AM »
Does anyone know where a very informative (and a bit frightening) copy of an old black and white film can be found which investigates the stability issues of trikes? It used to be available on loan to Colleges and Motor Trade institutions. But from where I cannot remember.
I think it might change a few minds!
Jim.

24
British Bikes / Re: Anybody with Twenty One / 3TA experience?
« on: July 29, 2013, 11:43:49 AM »
Without looking anything up I would think that talking millimetres for any dimensions except Bore x Stroke for a British bike this age is ridiculous. As far as I am aware all dimensions on British engineered machines were Imperial except that for some reason bore, stroke and capacity always seemed to be traditionally Metric worldwide except for the USA.
Certainly mixing 1/4 inches and 6 millimetre on the same item sounds rather strange.
I have a 1959 5TA which has no primary chain tensioner either. Because I have never been able to obtain a primary chain cover gasket to fit (which is different too) I have always had to make my own.
It has a three spring clutch which seems to be quite normal, though four spring clutches were also fitted on some.
By the way, that is the bike in my Avatar pretending (minus the bath-tub and plus a few 5T bits), to be a 5T!
Jim.

25
British Bikes / Re: anyone interested in old cars as well as bikes ?
« on: July 29, 2013, 11:26:19 AM »
This is getting out of hand.
In the end it is more how the weight is distributed than anything else in the quoted examples.
But here is a thought. Why do dodgem cars at fairgrounds never have two wheels at the front?
Jim.

26
British Bikes / Re: anyone interested in old cars as well as bikes ?
« on: July 26, 2013, 10:01:39 PM »
If you sling an engine BETWEEN a pair of wheels it is more difficult to turn it over, front or back. Keep it low and it gets more difficult. That sums up a Morgan! With admittedly startling cornering ability.

The Reliant has the engine at the "wrong end" for best stability of the wheel arrangement and the Cof G is much higher for passenger comfort, but all that just compromises the INHERENT STABILITY of the best wheel arrangement.
A Reliant with a rear engine between the two rear wheels and lower seating with less ground clearance would have proved a much more stable design.

Oh and the first Reliant I ever drove was an aluminium bodied open top two seater produced before the Robins etc. It was lighter, very nippy and a lot of fun to drive. It never felt in danger of turning over and I wanted one! Could not afford it though! 


27
British Bikes / Re: anyone interested in old cars as well as bikes ?
« on: July 26, 2013, 09:45:27 AM »
Just had a further thought.

Consider a child's pedal cycle (tricycle). Why are they always single wheel at the front and the riders seat well back?
The reason is simple. IT IS THE MOST STABLE AND SAFEST CONFIGURATION with 3 wheels! Adding a heavy load (engine?) over or in front of the front wheel produces a vast stability change.
Of course keeping the C of G low will help whatever configuration.
Jim.

28
British Bikes / Re: anyone interested in old cars as well as bikes ?
« on: July 26, 2013, 09:25:43 AM »
anyone who thinks one wheel at the front is more stable than two has never driven a reliant , i dont care what science says

You are blaming wheel configuration when you should be considering  the centre of gravity dictated by engine position. Put the single wheel AND the engine at the back and handling can become frightening.
I had a smart looking three wheeler, I believe was called a Coronet ( though I may be wrong - it was over 50 years ago) with Anzani 3 cylinder engine at the rear. Almost new.
Yes I am that old and there were lots of 3 wheelers still being produced. of which I have driven many!
The Coronet looked fantastic and had a fair turn of speed, but using the speed on a corner was a different matter. "Sucking eggs" seems to fit here and to me science is more reliable than beliefs.
I can also vouch that a Reliant Robin is perhaps more stable on the water than on the road! ;)

Yes that is me with a Robin!

Jim

29
British Bikes / Re: anyone interested in old cars as well as bikes ?
« on: July 24, 2013, 10:30:31 PM »
If you study stability and wheel arrangement scientifically you will fint that a single FRONT wheel is inherently more stable. Unless of course you are daft enough to slam the brakes on on a sharp corner.
Three wheelers below 8cwt could be driven on a motorbike licence, making them an easy transition from motorcycling to covered motoring without a car test. But not if fitted with reverse gear I believe. Though Siba Dynastart which ran the a 2 stroke engine avoided that that.
Jim.

30
British Bikes / Re: anyone interested in old cars as well as bikes ?
« on: June 25, 2013, 10:00:06 AM »
TF not TC, which had separate headlamps.
 Although often called a "Kit Car" it is not really. It is almost totally Triumph Vitesse with a different body rather than a kit of parts sourced from different places.

 Perhaps this car could be called a "Kit Car" because only the chassis and running gear were made under the makers name it carries. The body was designed and made by Park Ward.
 By the way, the bloke holding the door open was my dad and when he did not drive it I generally did!

http://www.imageshack.com/i/0mcu1939rollsroycesilverwj

Jim.

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