This is the rough bare forgings for 970/1070/1275cc block type cranks only.
These are what we use for machining our EN40B steel crankshafts but are made available for those wishing to get their machine shops to do their own design.
These were designed to make 58-88mm stroke cranks--970 upwards but Mini Spares can only get them made in batches of 10 for each type, per different stroke with Arrow Engineering.
used for our
C-AEG479 81.3mm S crank 1.625"big end
C-AEG478 86mm S crank 1.625"big end
C-STR931 81.3 1300 big end journal 1.75" big end