Mikuni carb parts

In message <1ibolti.16ejavw1ec7a24N%totallydeadmailbox@yahoo.co.uk>, The
Older Gentleman <totallydeadmailbox DeleteThis @yahoo.co.uk> writes
>Pete Fisher <Peter DeleteThis @ps-fisher.demon.co.uk> wrote:
>>
>> FI is wonderful when it is working, and it seems at least in some forms
>> to have a reasonably long life span. I can't help wondering though if
>> the latest ECU FI bikes will survive to be VMCC eligible. Perhaps only
>> very desirable bikes will survive that it is worth paying for a new
>> brain to keep running.
>
>If there's a demand for it, and there's a bob or two to be made,
>somebody will step in. Somebody always does.
>
>

For maim stream machines with long production runs you are probably
right. For ultra-exotica the owner can have a one-off built if they have
the specs or can get the unit reverse engineered. As I said, it's the
rare but not sought after that may not survive. No demand unless the
price is realistic. Hoh, hum, a sort of SOB survival of the most
desirable if not necessarily the fittest I suppose.

>> The really pikey stuff with carbs and simple CDI
>> will also survive. A whole range of interesting stuff in between may not
>> even if cosseted, once the ECU fails. The cost of some ignition black
>> boxes is also enough to consign a bike to a TOG's Ebay death by a
>> thousand cuts.
>
>See above, you cheeky monkey.
>
>

TBF, I am overdue for a bimble over to NLM to get one of their
new-fangled Morini electronic ignition pickups and probably a pair of
pattern transducers to go with it. So, yes there will be niche markets
for electronic unit replacements if sufficient numbers of machines
survive otherwise.

Surprising what can be lashed up on the ignition side with a few simple
components and the right knowledge. There are already developments in
the FI field by the look of this:

http://www.megamanual.com/v22manual/mintro.htm
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Pete Fisher <Peter DeleteThis @ps-fisher.demon.co.uk> wrote:

> As I said, it's the
> rare but not sought after that may not survive.

I think that's the same with any generation of bikes.

Think of all those horrible Villiers-engined things of the 1950s, the
British scooters of the 1960s, and the Honda CB500Ts of the 1970s.

The word you want is "undesirable"


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 >> Stay informed about: Mikuni carb parts 

In communiqué <1ibona6.1mb4qx0zua0poN%totallydeadmailbox@yahoo.co.uk>,
The Older Gentleman <totallydeadmailbox.DeleteThis@yahoo.co.uk> cast forth these
pearls of wisdom
>Pete Fisher <Peter.DeleteThis@ps-fisher.demon.co.uk> wrote:
>
>> As I said, it's the
>> rare but not sought after that may not survive.
>
>I think that's the same with any generation of bikes.
>

True, but some cranks will seek after almost anything.

>Think of all those horrible Villiers-engined things of the 1950s, the
>British scooters of the 1960s, and the Honda CB500Ts of the 1970s.
>
>The word you want is "undesirable"
>
>

<looks at sig even more ruefully>

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Mungo "Two Sheds" Toadfoot wrote:

> Champ wrote:
> > On Fri, 1 Feb 2008 22:55:20 -0000, "Mungo "Two Sheds" Toadfoot"
> ><eastREMOVEkent.TakeThisOut@gmail.com> wrote:
> >
> > > I'll still buy a couple of kits from Andy though,
> > > mainly because I like taking carburettors apart. It's the accuracy
> > > of them. I likes precision, me.
> >
> > Given that a carburettor has been described as a device to deliver
> > exactly the wrong quantity of fuel to an engine at any time, I think
> > you are a bit confused.
> >
> > If you want accuracy, you want injection.
>
> I refer to the accuracy of the machining and the balletic operation
> of the interlinked mechanisms, Mr.Champion, not the functionality.
> Heathen.


Carbs are much like crufty old bits of software...

You start out with an air intake, and a capillary tube and a small fuel
source. Then somebody comes along and wants variable output power, so
they add a throttle. That makes the engine run too rich at small
throttle openings, so someone else adds a variety of capillary tubes at
different heights to approximate the right fuelling for each throttle
opening, and opens and closes them off with a specially tapered needle.

Then somebody wants to run it at a low revs while it's idling to reduce
fuel consumption, so they add another capillary tube and another small
air intake.

Then you get tired of cleaning all the little tubes out, so you add a
filter.

Then some bright spark says that the throttle takes too much
concentration to use while driving, so they add a second throttle,
controlled by the engine and not the driver, actuated by a system of
vaccume tubes and plungers.

Then someone wants to use it when it's cold, so they add a mechanism to
temporarily enrich the mixture.

Then a different person says, "Umm, what I'd really like to do is link
four of them together..." and you end up with a series of levers and
locking screws to make them all run in roughly the same way.

Then a particularly able chap comes along and says "I can increase the
efficiency of the carb, and thus the power of the engine, by tuning the
resonant length of the intake to match the frequency of the valves
opening and closing".

Then some Japanese chap decides to get a cheap power boost by
pressurising the whole thing with a complex network of tubes and
chambers
and baffles, and so drills a hole in the side of each the fuel chambers
and plumbs them into one of the chambers with little rubber tubes.

When all that has happened, and the damned things won't fuel your
motorbike properly while you're riding in the alps, you have to employ
an expert to spend 4 days muttering under his breath before suggesting
you throw the whole lot away and upgrade to this nice simple FI system
that he can get you for cost plus time spent.
 >> Stay informed about: Mikuni carb parts 

Simian wrote:
>
> Carbs are much like crufty old bits of software...
>

<Large snip>

*Applause*

Well observed and written, that Simian.

--
Si - XV535
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On Sat, 02 Feb 2008 19:20:15 -0000, in
<13q9gjfjsefp663.TakeThisOut@news.supernews.com>, "Simian"
<simian.TakeThisOut@in_valid.semi-evolved.org> wrote:


>When all that has happened, and the damned things won't fuel your
>motorbike properly while you're riding in the alps, you have to employ
>an expert to spend 4 days muttering under his breath before suggesting
>you throw the whole lot away and upgrade to this nice simple FI system
>that he can get you for cost plus time spent.

Heh. Bet it saved you a fortune in unburnt fuel too. When I'd dropped
back behind you guys in the alps I could actually tell when I was
getting within a mile or so by the pungent tang of petrol vapour in
the air.

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