If polaris delays valve opening RPM for emissions , can we assume that disableing this may help prevent the lean midrange....Or is this a fine tuning of the torque curve for these new motors....I just installed a digatron to help with dialing in my '07 600 this winter but has anybody with EGT's experimented with plugging this vent....Also , for the 600 carb the RPM is delayed till 6700 or 7200 depending on throttle position
On the bold, regarding mid-range LEAN condition, NO THIS WON'T HELP!
I installed a PC III on my D-7 to cure the mid-range lean condition @ 5000+/- R.P.M. added 5-7% more fuel, runs perfect now, and before the "stumble" was so bad it seemed like the sled "shut-off"