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for single cylinder,1 ^& H+ Z9 F1 F; k: D3 D5 @: l: l
1. Weigh the rotating parts (bottom of connecting rod, lower connecting rod bearing, counterweight pin)1 q1 E/ ~6 ^, Q# B
2. Weight the reciprocating parts (piston, rings, wrist pin, top of connecting rod, top connecting rod bearing)( g) h* b6 C) c& ^
3. Use 100% of the weight from #1 and 50% of the weight from #2.% a1 H# T( d8 i
4. multiply result of #3 by 50% of the stroke length to get the torque needed for the counterweight
, ^3 a- v0 d" O$ L# u+ ]' D$ _; u1 q |
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