650/X-2 750 x2 jetting recommendations

Hello. I just built two 750 kawi x2s. They both run fine, but not optimal. Since I don't have much experience with kawi engines, I need some jetting recommendations to start tuning. Thanks in advance.

Here are the specs:

1st ski:
750 SP
Stock twin Keihin CDKII 40mm with blowsion Flame arrestors
PJS 650 exhaust and waterbox
650 electronics

2nd ski:
750 BP
Twin 44 SBN's with blowsion Flame arrestors
West Coast 650 exhaust
Drilled stock waterbox
750 electronics
 
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