Topica Loopframe_Guzzi Archive
 

Subject: Re: Spark Plug Reading

Author: Martin Cooke

Date: Aug 6, 2002, 12:13 AM

Post ID: 1710743445

sounds ok, but (disclaimer) i've not seen them.

but it seems it's been running ok & all you've done is change the plugs, so
i don't see any probs there.

i can't remember if higher no's mean hotter or colder plugs* with NGK. if
you're running a colder plug you will get more deposits.

you can tell by comparing the business ends of the 2 plugs. more ceramic
nose contacting inner wall of main plug body means colder plug. BTW a hotter
plug will not make your motor run hotter, only the plug.

i'm sure you're fine.

cookie

----- Original Message -----
From: "Keith Ruff" <klru-@fcc.net>
To: <Loopfram-@topica.com>
Sent: Monday, August 05, 2002 4:19 PM
Subject: RE: Spark Plug Reading


 "if you just take the plugs out after general riding, not stuck in
traffic you can get some idea of the general running of your motor
though."

Thats the condition here, general riding no traffic, can you tell how
the bike running based on my explanation of what the plugs look like?
Too rich? Too lean? Right on?

Thanx.

Keith Ruff
71 Police Ambassador - NJ

Martin Cooke wrote:
 you are right about how to take a reading. i think you're talking about
a
"plug chop" done to acertain fuelling at full throttle by main jet.
useful
for racing bikes (cos not many street bikes see the main jet working on
it's
own).

if you just take the plugs out after general riding, not stuck in
traffic
you can get some idea of the general running of your motor though.

cookie


----- Original Message -----
From: "Jay Williams" <cj7-@hotmail.com>
To: <Loopfram-@topica.com>
Sent: Monday, August 05, 2002 3:31 PM
Subject: Re: Spark Plug Reading


 Unless there is some special technique for Guzzi engines that I'm not
aware
 of, the way to take a spark plug reading is to get the vehicle up to
operating temperature, accelerate at full throttle for 10-15 seconds,
kill
the engine and pull the plugs after coasting to a stop. The idea is to
get
a
 reading based on "under load" conditions.
Pulling the plugs after decelerating or idling generally won't give
the
 
 
 readings you want.


From: Keith Ruff <klru-@fcc.net>
Reply-To: Loopfram-@topica.com
To: Loopfram-@topica.com
Subject: Spark Plug Reading
Date: Mon, 5 Aug 2002 12:27:50 +0000

Good Morning All,

Wanted to get a reading/opinions on my new spark plugs. Installed the
NGK BP6ES' as prescribed by the manual and Mark Ethridge (saw his post
some time back). My mechanic had a set of B7ES' in there prior,
seemed
 
 
 OK, but they were black/brown when I pulled them after only a few
hundred miles. 1st, how long does it take to get a reading on plugs?
I've got about 100 miles on these new sets. When I pulled them, I was
glad to see they are showing the exact same type of wear, but they
look
 
 
 a bit strange to me, not really matching what the book readings say.
They are both clean mostly (probably because they are new), but half
of
 
 
 the ceramic center is white/tan, the other half has is brown, thought
it
 
 
 was "blistering" as the book says, but when I touched it with my nail,
it was almost like trying to scrape dried syrup off of a table top -
perhaps that is blistering? Bike seems to run fine, but I wonder if I
need to readjust the fuel mixture?

Thoughts? Thanx!

Keith Ruff
71 Police Ambassador - NJ






_________________________________________________________________
Join the world's largest e-mail service with MSN Hotmail.
http://www.hotmail.com

Entire thread: