PRECISION EFI STAGE 1 - 850 E-TEC
 
After several months of development followed by tests on dyno and in real conditions, here is the Precision EFI 850 E-TEC Stage 1 available for 2018,19 and 20. (2021 + currently in developpement)
One of the most important improvements of the new reflash is the optimization of combustion, which eliminates the loss of power when the tune pipe is hot. A drag race  between a barely warm 850 E-TEC and a hot one running for more than 30 minutes, clearly shows a good difference.
Thanks to the new Precision EFI  850 E-TEC Stage 1, the sensation of weak acceleration is gone, giving way to a more stable and efficient power curve with a significant gain of 6 hp, without changing or adding any parts.