[undy]

The best way to adjust ,IMO, is to set the linkage where the back carb if fully open when the front carb is too. That's the end product you want, at WOT both carbs are open 100% simultaneously. I think it works out to the front carb being open about 50% brfore the rear set starts to pick up. The rear carb opens about twice as fast as the front.

Make sure you adjust both front and rear idle jets, not just the front. Also make sure your accellerator pumps are adjusted properly, the actuator lever just touching the AP's diaphram.

I had to use the lightest spring (I believe the white one) on both secondary diaphrams, also ensure both secondary diaphrams are tied together, vacuum wise.

With no adjustments mine knocked down a 12.6 AFR on the chassis dyno, PERFECT!

The "design" was originally worked out by me with Quick Fuel for my Pond 482 setup. I bought the setup through Barry. Afterwards I forwarded the carb "design" to Barry since it worked out so well and he had interest.