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Messages - cardan

Pages: 1 [2] 3 4 ... 49
16

Often there's a recommended clearance from the piston manufacturer. If not, Villiers clearance would be a guide. If someone tells you less than 2.5 thou, or more than 4, I'd double check.

Leon

17
British Bikes / Re: 1920 sturmey archer 2sp gearbox
« on: May 11, 2018, 11:57:05 PM »

At best I think there might be a parts list - no repair manuals as such back then.

But it's a very simple box. What's the problem?

Leon

18
Hi Graham,

Terrot built tens of thousands of bikes, so let's assume the little bike worked fine when it was new, and worked OK until it stopped working. Most likely it wore out. Probably at the end the owner got sick of it not starting on the kick-starter and having to push it down the hill and jump on when it fired.

The idea of restoration is to measure and check everything, replace what needs replacing and fix what needs fixing, then enjoy the bike as it was when it was new. If you want the bike to run, you'll have to do these things - sadly no amount of forum chat will make it run if the thing is worn out. If the man at the engine shop tells you the bore is worn out, it's probably worn out. New rings won't help, because they are round, and the wear in two-stroke bore is not. How's the big end? The little end? Does it have any compression? If the engine is worn out, it will be very hard to start.

I'd be more than happy to have a look at it for you, but I suspect I'm on the other side of the planet. Perhaps you can hook up with someone experienced who lives locally? In the meantime, if you want it to run take the advice above and spin it over with a drill (or whatever), or just push it down a big hill. It will run, with the rattle and clank of a worn-out two stroke.

Cheers

Leon

19
British Bikes / Re: Royal Enfield 505
« on: May 09, 2018, 11:09:01 PM »

20
British Bikes / Re: Cush drive , necessary or not
« on: May 04, 2018, 01:30:50 AM »
I would think a big single bike with no cush-druve arrangements would be so horrible as to be unrideable.

A lesson well learned from the earliest days! Here's the cush arrangement in my 1903 Columbia. It lives on a counter shaft in the normal clutch position. The previous year, the "cush" was achieved by mounting the engine drive sprocket clamped between two large washers, but otherwise unconnected to the mainshaft of the motor. It things got snatchy, the sprocket just slipped. Crude, and not very effective, but Indian used a similar arrangement on their back sprocket for a number of years.

"Something's gotta give!"

Leon

21
British Bikes / Re: AJS model D needs a sidecar ?
« on: May 02, 2018, 12:34:55 AM »

Hi Karsten,

That's quite a sidecar - just perfect.

I wonder if the paint is from the AJS factory, or if it has been repainted at some time. If it's the original paint, I'd just clean and polish it, and have fun with the conversation that starts when people ask why the sidecar doesn't match the bike.

If it's not the original paint, I'd still leave it as it is, but I wouldn't be disappointed if you decided to repaint it.

These days there are many, many shiny things that are fake. If you have something that is genuine, enjoy it and tell people that yours (at least) is real.

I don't like fake patination - I'm sick of "barn find" board track racers and "racing" cyclecars.

Cheers

Leon

22

I'm a bit amazed that the timing side bush is unchanged, and that you're intending to leave the bore as is. But I guess you know when "the man" described it as "stepped and scored" that this is not good. Many restorations are like this: very pretty but rubbish mechanicals. Pity, as there is real joy to be had riding a machine that runs as it should. Measurement and fit are words just-about lost to motorcycle restoration these days.

Make sure you put the piston in the right way around. Was it correct before? The motor won't start if it's back-to-front.

Good luck.

Leon

23
Identify these bikes! / Re: Barr and Stroud mystery bike
« on: April 13, 2018, 12:12:41 AM »

What a pity that thought didn't stand up to scrutiny - it would have been a classic story.

On the sleeve-valve-motors-in-Melbourne theme: If a Barr and Stroud and Minerva - with full length sleeves controlling the ports - was called a sleeve valve, what was the Peugeot effort - with  very short sleeve - called?

"Cuff valve"! The late Jack Nelson owned one, as a young man in Melbourne just after the war. Nice car.

Cheers

Leon

24
Identify these bikes! / Re: Barr and Stroud mystery bike
« on: April 12, 2018, 01:32:36 AM »

Davies lived at 7 Zetland Road, Mont Albert. Maybe you can see if he's home? If not, check the crumbling shed at the bottom of the garden...

25
Identify these bikes! / Re: Barr and Stroud mystery bike
« on: April 12, 2018, 01:15:52 AM »

Hi 33d6,

Oh it's a cute thing! I do like a good cycle car.

JFerg and I recently discovered that quite a number of "Coventry B&S" motorcycles came in to Western Australia, complete with B&S engines, so in Australia we had both B&S bikes and loose engines.

I have method in my file names: yyyy-mm-dd-papername, so in this case 1928-08-20-herald-melbourne.jpg translates to the Herald, 20 August 1928. I don't usually use page numbers - I've found in the past that the Adelaide newspapers had several editions per day, and sometimes articles were moved.

Getting better photos is tough. In this case the Trove scan is pretty good, and a scan from the original newspaper wouldn't be too much better. At the State Library of South Australia, processing for Trove involved separating pages, and the papers were then properly packaged and put into "deep storage". I think I paid $60 to get a paper out last time I wanted a photo, but in that case the Trove scan was total rubbish. The staff at the library were amazed that I had been able to convince the powers that be to get the relevant paper out at all, and it was only because I convinced them that I was doing serious research, and the Trove scan was not fit for purpose.

Since the Herald is still around, I wonder if they still have an archive of photos that goes back to 1928? Now that would be interesting.

Cheers

Leon

26
Identify these bikes! / Re: Does anyone know what bike this is?
« on: April 11, 2018, 01:03:57 AM »

Levis introduced their "new low-built diamond frame" in late 1927 (for the 1928 season) on the K2 model.

According to the VMCC Register of Machines, frame number 19xxx would fit in with Levis from 1928.

A bit of googling and you'll see Levis machines with their frame numbers in the same position as on the mystery bike.

Looks pretty Levis-like to me.

Cheers

Leon

27
Identify these bikes! / Re: Barr and Stroud mystery bike
« on: April 11, 2018, 12:43:21 AM »
It might have two-times the number of regulation wheels, but have you got this one on your list JFerg? I suppose we could call it the Davies Cycle Car, and the article comes from the Melbourne Herald, in August 1928. I suppose the Barr and Stroud motor would have been one of the "loose" motors, rather than from a dismantled bike?

[Edit: Just realised there's only wheel at the back, so change "two-times" to "one-and-a-half-times"! Edit the edit: ah, there are 4 wheels if you look at the whole photo!!]

Cheers

Leon

28

There is something seriously wrong with those ports! Manufacturing problem? The whole idea of the two-stroke engine is that the piston rings control the port opening and closing with some precision. That ain't going to happen here. A small engine re-conditioner - if there are still such places - will advise.

Re the magneto-side shaft and bush. A bush is fine to act as both bearing and seal, but it wouldn't usually have an oil spiral; at least make sure it doesn't run all the way through the bush. The shaft needs to be round, unworn (not smaller diameter than the outer end!) and straight, and the fit in the bush pretty neat - maybe only a thou or so.

Cheers

Leon

29
The engine is all original, the bore is really good, piston is standard size and a nice fit, rings are new. When I stripped the engine the rings were solid in the piston due to carbon. There was a lot of carbon build up in the lower crank case which must be evidence of blow by.

Very hard to contribute on issues like this from a distance, but since it's getting desperate...

1. Re the bore, how do you define "really good"? Wear in a two-stroke bore is often not just at the top (as it is on a 4-stroke), but also just above and just below the ports. This is hard to measure, but on a little bike like this one even 0.005" wear in the wrong spot might correspond to "worn out". A worn out 2-stroke is hard to start - possibly why the bike was put into retirement? Certainly carbon in the crankcase sounds pretty grim. New rings won't help with wear near the ports because the bore here is no longer circular. The bore can be good at the top, and good at the bottom, but if it's worn out around the ports, the cylinder will need a rebore.

2. Replace the condenser.

Good luck.

Leon

30
British Bikes / Re: Massey & Massey Arran motorcycles
« on: March 04, 2018, 09:43:50 PM »

Fascinating! The front fork on the Triple H bikes in the advert is the "Maplestone". These were designed and built in Melbourne, Australia before WW1 by A. N. (Norm) Maplestone. After the war he took the design to the UK where it was at first built by Precision Gauges Ltd in Birmingham as the "Maplestone Cantilever Fork". The design was sold to Webb c1922 and was the basis of their very successful fork.

Does your bike have the Maplestone fork Keith? A little bit of history.

Cheers

Leon


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