1
British Bikes / Re: Dunelt and Barnstormers
« on: July 02, 2022, 11:03:31 PM »71 and 92 series pistons are tin plated 007 thick.
What are they when they are home ?
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What are they when they are home ?
2
Identify these bikes! / Re: Help To Identify This Bike Please
« on: June 30, 2022, 09:17:26 AM »
And from the other side.
Obviously need to know yer vintage Sunbeams to nail it here !
Quite a bike in its day.
Obviously need to know yer vintage Sunbeams to nail it here !
Quite a bike in its day.
3
British Bikes / Re: Dunelt and Barnstormers
« on: June 29, 2022, 11:01:37 PM »How do we know the plating won't flake off?
By the quality of the plating, and (hopefully) previous trial-and-error ??
You ever see a tin can in the supermarket with the plating not adhering ?
Although piston duty plating may be a different matter ..
If this is a reliable form of recondition, could negate the need for many a rebore ?
4
Identify these bikes! / Re: Help To Identify This Bike Please
« on: June 29, 2022, 10:55:42 PM »
Thats easy - its a motorcycle built for 3 !
That must narrow it down, considerably ...
What a great photo.
It does obscure a great deal of the bike though, like you say.
May we ask what country this is likely to be ?
That helps eliminating bikes its unlikely to be.
That front number plate looks somewhere continental, by the lettering ?
The inverted handlebar levers suggests 1920s, although did linger into the 1930s maybe.
The headlamp is acetylene, and looks european ?
So 1920s there too.
The exhaust pipe is quite tall the way its shown there, so not a run-of-the-mill small 2 stroke ?
Be interesting to see what future submissions make of this ...
That must narrow it down, considerably ...
What a great photo.
It does obscure a great deal of the bike though, like you say.
May we ask what country this is likely to be ?
That helps eliminating bikes its unlikely to be.
That front number plate looks somewhere continental, by the lettering ?
The inverted handlebar levers suggests 1920s, although did linger into the 1930s maybe.
The headlamp is acetylene, and looks european ?
So 1920s there too.
The exhaust pipe is quite tall the way its shown there, so not a run-of-the-mill small 2 stroke ?
Be interesting to see what future submissions make of this ...
6
British Bikes / Re: She's hot
« on: June 19, 2022, 10:55:57 PM »
Ha !
I've been to enough farm clearing sales to know that the scrap man makes a tidy living from
snapping up old 'collectables' - about anything metal falls into this category.
And that was before the price of scrap steel skyrocketted.
We are getting well away from ailing old BSA's though.
I've been to enough farm clearing sales to know that the scrap man makes a tidy living from
snapping up old 'collectables' - about anything metal falls into this category.
And that was before the price of scrap steel skyrocketted.
We are getting well away from ailing old BSA's though.
7
British Bikes / Re: She's hot
« on: June 18, 2022, 10:48:35 PM »
Don't knock it, thats saved 97% * of old bikes from oblivion.
* figure plucked at random from the sky.
Motorcyclists tenacity in holding on to worn/knackered/obsolete/past it bikes is legendary.
Although a heck of a lot of 'collectors' of about nearly everything mechanical show this trait ?
* figure plucked at random from the sky.
Motorcyclists tenacity in holding on to worn/knackered/obsolete/past it bikes is legendary.
Although a heck of a lot of 'collectors' of about nearly everything mechanical show this trait ?
8
British Bikes / Re: She's hot
« on: June 18, 2022, 07:40:23 AM »
And as someone unfamous once said, anything that goes wrong with
your pride and joy can be fixed, with a mere wad of $$$ ...
your pride and joy can be fixed, with a mere wad of $$$ ...
9
British Bikes / Re: She's hot
« on: June 17, 2022, 11:57:19 PM »
I'm not saying I agree or disagree with any of this.
But we all know what an 'expert' is, right ?
X = an unknown quantity.
spurt = a drip under pressure.
So an expert is the unknown quantity of a drip under pressure !
??
There certainly are varying levels of expertise though ....
But we all know what an 'expert' is, right ?
X = an unknown quantity.
spurt = a drip under pressure.
So an expert is the unknown quantity of a drip under pressure !
??There certainly are varying levels of expertise though ....
10
British Bikes / Re: She's hot
« on: June 04, 2022, 02:23:43 AM »
If the ignition timing is not right, could be the reason it blew that head gasket.
And if that ignition timing is still not right, future problems you might ? see is a part
molten piston coming out into the exhaust pipe, or the big end giving up the ghost. !!
Trusting to blind luck without any science to it is not really a plan for long-term ownership ...
And if that ignition timing is still not right, future problems you might ? see is a part
molten piston coming out into the exhaust pipe, or the big end giving up the ghost. !!
Trusting to blind luck without any science to it is not really a plan for long-term ownership ...
11
British Bikes / Re: She's hot
« on: June 01, 2022, 11:15:33 PM »
Pic should be clickable ?
https://scontent-lcy1-1.xx.fbcdn.net/v/t39.30808-6/285550733_2784230041885948_2004379972179408339_n.jpg?_nc_cat=100&ccb=1-7&_nc_sid=730e14&_nc_ohc=kgEahhfweGMAX_6YTo0&_nc_ht=scontent-lcy1-1.xx&oh=00_AT_M86D_ypgItVJR8t-v3zK5We0YrpMnV2gvJwfxxOrA2A&oe=629C2B83
The only one of any real interest is the points.
Which as Leon sez looks like .003 is about as open as they will get.
Makes you wonder where the timing is ??
https://scontent-lcy1-1.xx.fbcdn.net/v/t39.30808-6/285550733_2784230041885948_2004379972179408339_n.jpg?_nc_cat=100&ccb=1-7&_nc_sid=730e14&_nc_ohc=kgEahhfweGMAX_6YTo0&_nc_ht=scontent-lcy1-1.xx&oh=00_AT_M86D_ypgItVJR8t-v3zK5We0YrpMnV2gvJwfxxOrA2A&oe=629C2B83
The only one of any real interest is the points.
Which as Leon sez looks like .003 is about as open as they will get.
Makes you wonder where the timing is ??
12
British Bikes / Re: She's hot
« on: May 29, 2022, 10:29:45 PM »
You will also need to check exactly where your ignition timing is at some point !
13
British Bikes / Re: 1973 Bonneville Wiring
« on: May 29, 2022, 10:27:41 PM »
Going off on a tangent here - but some generic horn/dip switches I bought recently only came with about 18" of wiring on them.
So for general/most use, the wiring is too short to fully reach inside the headlamp.
And all on the market seem to be similar.
Who's brilliant idea was that. !
Yes I know anything to save a few pence ....
So for general/most use, the wiring is too short to fully reach inside the headlamp.
And all on the market seem to be similar.
Who's brilliant idea was that. !
Yes I know anything to save a few pence ....
14
British Bikes / Re: She's hot
« on: May 27, 2022, 11:07:03 PM »
And/or take it apart and degrease all the components then.
Sounds like what is missing is friction ?
Sounds like what is missing is friction ?
15
British Bikes / Re: She's hot
« on: May 25, 2022, 11:29:53 PM »
Not only is it passing x cubic feet of air per minute, its vapourizing the fuel into the airstream.
Most cars have heated manifolds, to prevent carburettor icing from this.
I once had a split water hose which forced a rejig to the heating to go elsewhere,
and the result was carburettor icing HELL - the carb would ice up, block off the flow,
the engine would cut out, freewheel for a while, the blockage would melt,
and the whole process repeat. You wondered if it was going to get home.
(It was a damp day.)
I note the above mentions only half advancing the timing.
This means its running with retarded timing.
Most engines hate this, it can leading to overheating most promptly.
Riders really need to control this function quite diligently.
Not fully opening the air lever means its effectively running with the choke part/half on.
Most engines hate this, and will chuff black smoke and carry on.
Riders really need to control this function quite diligently.
Most cars have heated manifolds, to prevent carburettor icing from this.
I once had a split water hose which forced a rejig to the heating to go elsewhere,
and the result was carburettor icing HELL - the carb would ice up, block off the flow,
the engine would cut out, freewheel for a while, the blockage would melt,
and the whole process repeat. You wondered if it was going to get home.
(It was a damp day.)
I note the above mentions only half advancing the timing.
This means its running with retarded timing.
Most engines hate this, it can leading to overheating most promptly.
Riders really need to control this function quite diligently.
Not fully opening the air lever means its effectively running with the choke part/half on.
Most engines hate this, and will chuff black smoke and carry on.
Riders really need to control this function quite diligently.