Date: Mon, 25 Oct 1999 08:57:05 -0400
From: Chris L Johnson 
Subject: Re: gasser wiring

On Sat, 23 Oct 1999 10:09:09 +0100 "BRAIN FAMILY"
 writes:
>  CHRIS
> 
> CAN YOU POST A WIRING DIAGRAM ON YOUR TECH PAGE SHOWING WIRING AND 
> COLOURS
> ON MY JTR370. I AM PARTICULARY INTERESTED IN HOW TO WIRE UP AN 
> ENGINE CUTOUT SWITCH AS I DONT HAVE ONE!
> 
> CHEERS 
> GARY B

No diagram needed, and I can hear just fine.  Please, YOU DON"T NEED TO
SHOUT! :-)

The engine cut-out switch is a simple affair.  It is nothing more than a
circuit to ground one the othe leads of the ignition coil.  On most - if
not all - bikes, there is a black wire going from the coil to the
handlebar kill switch, plugged into the coil.  Your bike will probably
have, as my `95 Gas-Gas does with Ducati ignition, a clearly-labelled
STOP molded into the body of the coil.  STOP is one of the four leads
going into the coil.

Buy a Japanese-style, two-wire kill button from one of their dirt bikes. 
Install in the center of your handlebars between the clamps.  Run one
wire to the STOP lead on the coil.  Ground the other wire to one of the
two the coil retension screws.

That's it.  No mystery.  If you use a Euro-style, single wire kill
button, the ground will be into the handlebars and through the steering
head bearings into the frame.  Make sure the metal retension band on the
kill button gets a good ground on the bars.  Again, the two-wire models
are much better.  Cut off excess wire or zip tie the wires neatly,
running them kink free through frame to bars.

Chris Johnson
Scorpa 250 EZ Fun/Gas-Gas 160/Fantic 305/Yamaha Virago 1,100/XV920RH Euro
and now vintage `74 TY 250
chris "at" college-park.com as Director of Engineering at College Park
see www.college-park.com and papazit "at" juno.com (personal address)

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I just hooked up a kill switch on my 99 321 there is a four prong connector
that goes to the handle bar switch.  The wire on the bike side is blue.  I
used an old connector from a car stereo speaker wire so I could just hook up
to the terminal with out cutting into the wiring.   The 99 had such a rats
nest of wires that it was hard to trace them back to the black box.

Byron Okubo

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Byron:

So good to have an experienced word from an actual owner.  I am at a
disadvantage in that all my bikes have had the rats nest removed. 
Probably wasn't good of me to assume the stock stuff was still on on the
bike.  I recently de-rat's nested my Scorpa.  There is very little excess
space under the tank on a Scorpa!  Things sure made more sense after the
pile was on the table and not on the bike!

Chris Johnson