- Fri Sep 16, 2016 1:59 pm
#62300
Gwilly, they BOTH retard the ignition at start-up, or should do!
The green TCI box is the later version with the spark DELAY, developed as an answer to the original black box TCI causing the kicking back on start up. As far as I know both use a the same electronic advance and retard curve, the spark delay version is intended to let the engine spin up to a decent cranking speed. The sudden load on the electrical system caused by the electric starter can cause a voltage drop. It sounds like the original black TCI would behave in the same way as a Boyer Bransden Mk3 on an electric start Norton Commando and go fully advanced if the battery output was less than perfect. Crunch bang.
I quote from Paul Goff's web site for the Pazon Sure Fire ignition here:
"The Pazon Sure Fire system has several advantages over the Boyer unit.
It will start the bike even if the battery Voltage is low, down to 8 Volts. The Boyer unit goes full advance at anything under 10 Volts resulting in spitting through the carb or violently kicking back.
Very useful on a Mk3 Commando preventing backfiring destroying the sprag clutch drive from the starter motor."
http://www.norbsa02.freeuk.com/goffypazon.htm
As an interim measure Watsonain-Squire, the previous UK RE importers, came up with a separate spark delay module prior to the green TCI boxes being made available, many as FOC replacements.
Apart from getting your carb set up, the other major factor in a successful E/S Electra is having a decent battery, my OEM version and its first lead-acid replacement weren't up to the job, use a Motobatt 14AH AGM battery or similar if you haven't already got one.
A.
The green TCI box is the later version with the spark DELAY, developed as an answer to the original black box TCI causing the kicking back on start up. As far as I know both use a the same electronic advance and retard curve, the spark delay version is intended to let the engine spin up to a decent cranking speed. The sudden load on the electrical system caused by the electric starter can cause a voltage drop. It sounds like the original black TCI would behave in the same way as a Boyer Bransden Mk3 on an electric start Norton Commando and go fully advanced if the battery output was less than perfect. Crunch bang.
I quote from Paul Goff's web site for the Pazon Sure Fire ignition here:
"The Pazon Sure Fire system has several advantages over the Boyer unit.
It will start the bike even if the battery Voltage is low, down to 8 Volts. The Boyer unit goes full advance at anything under 10 Volts resulting in spitting through the carb or violently kicking back.
Very useful on a Mk3 Commando preventing backfiring destroying the sprag clutch drive from the starter motor."
http://www.norbsa02.freeuk.com/goffypazon.htm
As an interim measure Watsonain-Squire, the previous UK RE importers, came up with a separate spark delay module prior to the green TCI boxes being made available, many as FOC replacements.
Apart from getting your carb set up, the other major factor in a successful E/S Electra is having a decent battery, my OEM version and its first lead-acid replacement weren't up to the job, use a Motobatt 14AH AGM battery or similar if you haven't already got one.
A.
