OK so one last review after the last race of 2021. I gave 721 SV one last chance on this weekends race. At first I was really skeptical of running this engine again but it was an expensive investment and I really wanted it to perform as it was advertised.
I put the stock carb back on and hit the track but this time I set the idle slightly higher and put on a brand new os p3 plug. Suprisingly with the idle slightly higher than what I would normally run with os speed or novarossi, SV performed perfectly. It is really fast and responsive.
One thing hovewer initially I ran reds 2143 with medium header then I changed the pipe to mielke efra 2041 turbo. I believe 2041 works much better but it is subjective. All in all REDS is great but you need to understand how these engines need to be tuned properly.
Last edited by cansoykal; 10-24-2021 at 08:21 AM.