yeah, but this is an art to do really well.
It is easy to do the plug cut, but hard to accurately
read the colour and match that to mixture requirements.
Tis more of an art than a science... Took me quite a while to
get it right back when I was racing production 2 stroke
motorbikes. You wanted it lean for HP, but not *too* lean
because you'd seize the motor. I got good at catching the
seize with the clutch long before I was accurate enough on
the plug reads!!!
Far easier, more accurate and *quantitative* to go to a
rolling road dyno where they know SUs or Webers or
whatever your preference.
Mike
----- Original Message -----
From <Daniel1312 at aol.com>
To: <NewNGsInfo@cs.com>
Cc: <spridgets@autox.team.net>
Sent: Sunday, March 04, 2001 5:14 AM
Subject: Re: SU Carb. needle info and CHARTS!
> Hi John,
>
> I'm not surprised because it is a typo. CUTS should be CUTS.
>
> To accurately read the colour of the deposits on a spark plug you need to
> know what they look like for any given rpm. EG run the motor up to 5K, hold
> steady, then switch off the engine and dip the clutch. Then have a look at
> the plugs, the deposits on them are the ones from running the engine at 5K
> rather than after you decelerated went down through the gears, idled the
> motor and stopped.
>
> Daniel
>
> In a message dated 03/03/01 08:24:16 Pacific Standard Time, NewNGsInfo@cs.com
> writes:
>
> << I don't understand that phrase/operation. Help?
>
> Thnx, John >>
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