Originally posted by Taffy: Matt i stand corrected on those tolerances. we are agreed that each ignition has it's benefits (wr best at bottom & yz at top). so the vortex covers it all hey!!!! plug! plug! plug! (you've more teeth with that salesmans smile than james coburn!) clark used to have a steady throttle stutter which was, in his case, not cured i believe. the ignition was modified to 'ISDE'. also why have two curves when one is never used. how much!!! yes... we are agreed! I can't quite get my head around the teeth thing.. (I thikn its the brown liquids fault! ) I think you'd use both curves when you get used ot having the switch there.. 1 for wood and another for WFO stuff. I'd have to check.. but for the Vortex Dual Curve prob about $280-$300+freight.. The Vortex distributer in the US is charging around $365+p&p. I'd do them for the best price I can/around! ------------------ -- **Ride it like you Stole it!** Matt Porritt 99 YZ400F Vist the Rubber Chicken Racing Online Shop Discounts for ThumperTalk members.