crazypj
Split personality, I fake being smart
The weight of inner spring isn't the problem the resonant frequency could be.
Beehive springs have a naturally higher frequency, plus, the generally smaller retainer is lighter, if your using the same size or larger it's a disadvantage (rocker arm will probably contact retainer edge)
On a CB175/200 you would have to rev it to about 38,000 rpm before valve spring resonance is a problem ;D
The parasitic power loss is usually lower with beehive springs, but, it's easier to put a 30 degree back cut on valves to make them lighter and use stock springs (the back cut also helps low lift flow)
Beehive springs have a naturally higher frequency, plus, the generally smaller retainer is lighter, if your using the same size or larger it's a disadvantage (rocker arm will probably contact retainer edge)
On a CB175/200 you would have to rev it to about 38,000 rpm before valve spring resonance is a problem ;D
The parasitic power loss is usually lower with beehive springs, but, it's easier to put a 30 degree back cut on valves to make them lighter and use stock springs (the back cut also helps low lift flow)