I think they are actually cast aluminum not magnesium and yes they are heavier
Some 1976 Kz900 LTD had magnesium cast wheels. They were more of a Gary color than black. Can’t help with weight, but at over 40 years old they should not be used for racing. I have no first hand experience with them but been told they are brittle.
I can't answer the question, but I can measure what I have and maybe someone else can add to the list, as I don't have a spoke wheel to measure. Anyone have a front and rear spoke wheel set they can measure, or a Kz1000 19" cast front or 16" cast rear? Anything else? Dymag?
I used my
, which is reasonably accurate. I used kilograms just because...
In all cases these wheels are completely stripped of everything but the wheel bearings. No tire, no bead locks, no disc or chain hub. Just the wheel and bearings. The GSXR wheel has a rubber valve stem as well.
'78 Kz1000 Z1-R Front, 18 x 2.15: 5.01 kg
'78 Kz1000 Z1-R Rear, 18 x 2.15: 6.07 kg
Lester rear for kz1000 (4 bolt disc), 18 x 2.15 : 6.73 kg
'86 GSXR1100 rear, 18 x 4.0 : 6.69 kg
'78 Z1-R in blue, '78 Z1-R in black, '78 Z1-R in pieces
'95 GPZ1100 (sold) , '00 ZRX1100