FCR Jetting?

[400exrip]

I wanted some of you guys opinion on what jet sizes I should run, this is with the 39mm FCR from Curtis Sparks
Motor:
440 with 12:5:1
Ported and polished head
Stage 3 hotcam
Kibblewhite valves
Hard faced rocker arms

list goes on and on, This is a fully built National race motor for TT racing, Engine builder sent me a 165 main And I think that is WAY to lean. Any help is appreciated, remember this is for the 39mm FCR.

[drew416ex]

Yeah the 165main is what they sent me for my 416 with the fcr. With my current setup i am at a 190-200 main and i believe a 45-50 pilot.

[IMSROLL450R]

Very similar motor with a 170 main and 48 pilot.

[drew416ex]

Your best bet its to get someone with a dyno and sniffer to tune it. I had mine at a 175 and it ran great with no problems, but as it turned out I was on the lean side. Actually gained 10 hp after the rejet.