i did the top 3 holes:
Static Rebalanced:
Small end weight When levelled:
Pri side 203 gr, timing 200gr = 403 gr
Pistons complete each 457 gr
Formula: free to The Man:
Weight to balance (where we take the % from) = small end + pistons complete
1317gr = 403 +2(*457)
Test: % of wieght - smallend=FG (FG: being weight to the smallend when in balance)
638 - 403= 235gr
So 638 is 48,4 % of 1317 (being 100% reciprocating weight)
To balance to about 55%
By drilling the 4 top holes to 13mm and the middle top holes milled 12,5 and milled bit to the top
After some extra drilling FG became 303gr leaving the balance weight to 706
this being
53.6% balance factor from 1317gr
that worked for me,
although still not Dynamically balanced, (one need to make a bob wieght exactly running in true, let allone the weight....) have to say i did frist both flywheels on a knife edge, bit cumbersome but one gets them more or less the same, when done in two axis.
well of course this is all shit so may god and good luck be with you, when finally you start her and she jumps like a horse