when i was searching the web to make my set by myself i gothered some info , Someone might find it useful
129700-3630, 1.3 Ohm's primary, xxxx K Ohm's secondary, length xxxx
Used on 1999-2003 ZX9,
129700-3881, 2.5-3.1 Ohm primary, 11.8K to 15 K Ohm secondary,
Charge time ~ 3.1 ms (from internet...