Hey guys ..
I hope someone can guid me to proper EFI sitting that can help with increasing high speed.
Before the stage II setup the boat was too slow compairing to my buddy Sedoo RXP215 .. he was kicking mine from the start all the way to high speed.. but when I installed Stage II setup + ported cylender and 14\20 impeller it was fast at low speed but lazy on high speed .. so when I tried it my buudy I kick start strongly but he pull at high speed.
I think I got somthing wrong with the EFI sitting or it might be the empeller ..

Another thing to say .. is the GP1300 has a cut off controller (Ignition) ?

GP1300 build:
Stage II
Ported cylender
14\20 impeller
EFI adjusted to according to riva stage II adjustment instructions

Thanks in advance