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From: R. LaCasse on 9 Jul 2009 21:49
On Thu, 9 Jul 2009 15:32:26 -0600, "Bob Myers"
<nospamplease(a)address.invalid> wrote:

|>> Standard?? You're a dying breed, Bob.
|>
|>Aren't we all?
|>
Yeah I feel that way..

|>Actually, there's still a pretty fair number of bikes out there that
|>satisfy my tastes; not everything coming out of Japan is wrapped
|>up in unwanted plastic*, and there are definitely some tasty options

A lot of Jap stuff is from Taiwan, and all the other mainland China
that are called Red China...

|>still coming out of England, Italy, and Germany too. So there
|>MUST be a few others out there besides just me...
|>

They make a lot of good Jap Bike parts, plus a few good whole bikes,
that don't change their design every year like the Cell Phone fads and
hard/software systems.

|>
|>* What's unfortunate is the number of such Japanese models
|>that, for whatever reason, never make it to these shores.

That's a supply and demand "bulk Purchase" factor like all the made
in China shipment policies, so they fall off the side because some aren't
worth the 3-->12 month warranty.

(Yamaha Majesty/Skyliner 400).

Motor = Italy Minamelli/Motobi/Moytobi and affiliates something

Metal Body/Frame= North industries Complex/Iron rice bowl

Electronics = ECU/first and secondary ignition system is All Japanese

Flexible plastics = Taiwan

Hard plastics like headlight covers = All China factories.

ASSEMBLY of ALL this stuff = Yamaha/MBK France..

Pre Mass Production Testing Motobi/Moytobi/Majesty/Skyliner 400/etc....

Exportation/Importation of the YProduct all Zionist Guvmint Borders plus
DOT/CSA/ANSI standards approvals.
From: paul c on 9 Jul 2009 22:46
paul c wrote:
....
> Well, I'd say Vito is right - the later CB750's, such as the 1982
> models, had twin cams and wasted spark. Any engine that doesn't have a
> distributor driven off the camshaft or equivalent electronics wastes a
> spark on the exhaust stroke, ...

(talking about 4-stroke engines, not 2-strokes.)
From: Stephen Cowell on 10 Jul 2009 08:31

"Vito" <vito(a)cfl.rr.com> wrote
....
> For many, chrome was better than daily polishing.

Chrome is the optimal exhaust finish... it helps
keep the temperature high on the way out the
pipe; any cooling takes away from horsepower
by reducing exhaust velocity and therefore aspiration.
Black is the worst finish for exhaust, since it
radiates heat fastest. Wrapped pipes solve this.
__
Steve
..


From: R. LaCasse on 17 Jul 2009 19:32
On Fri, 10 Jul 2009 07:41:15 -0400, "Vito" <vito(a)cfl.rr.com> wrote:

|>> valve job instead of simply rectifying the cdi/regulator of a single
|>> fire...
|>
|>Your statement is still unclear. I've owned half a dozen Brit twins, 10
|>Harleys, 8 airhead BMWs and god knows how many Jap multi's that "wasted"
|>sparks and not one ever needed a valve job because of it - nor have I ever
|>heard of one that did. The extra spark happens when the effected cylinder
|>is incapable of firing. The one exception is a Harley with its narrow V.
|>If the engine is turning over slow enough, like when a weak battery or
|>person is trying to start it, the extra spark *may* cause the motor to "kick
|>back". But burn a valve? Never.

That's right, I guess my "statement" was a bit unclear, although old
Harleys still fire both plugs at once, and when your valves wear out, this
causes backfiring, choking and sputtering.

|>>
|>> Or do you mean, you have 2 spark plugs per cylinder. which is about
|>> as good an idea as the 4 valve cylinder...
|>>
|>No. 4+ valve cylinders are needed to get the most power out of a given
|>displacement - like in a racing class. Otherwise cubic inches are cheaper.

Your right, cubes are cheaper than xtra valves....
From: R. LaCasse on 17 Jul 2009 19:42
On Fri, 10 Jul 2009 02:18:16 GMT, paul c <toledobythesea(a)oohay.ac> wrote:

|>Well, I'd say Vito is right - the later CB750's, such as the 1982
|>models, had twin cams and wasted spark. Any engine that doesn't have a
|>distributor driven off the camshaft or equivalent electronics wastes a
|>spark on the exhaust stroke, for that matter lots of modern cars waste
|>spark. Number of cylinders doesn't matter and it's nothing to do with
|>CDI, if the ignition pickup or exciter is driven by the crankkshaft, I
|>don't see how to avoid a waste spark.

The rectifier is mostly battery and primary regulated voltage, CDI
is spark to "secondary" coil and the ("you say" ignition pickup or exciter)
*Crankshaft Position TDC SENSOR* is timed by ECU/ECM....., am I right on
that so far?

Bob
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