I'm still holding off from to buying a juggernaut because after what I've seen I'm not actually convinced that the juggernaut is actually better than a well tuned comet. yes it vibrates less but the rpm gains it claims appear to be from the lack of an overdrive which can be achieved with a comet by adding a spacer. and the top speed gains I've seen have only been within a few miles an hour of an un tuned comet. I'm willing to bet a comet with the overdrive spacer and a set of the lighter aluminum weights could beet or at least match a juggernaut.
the type of testing that could prove which is better would need to test the juggernaut against a stock genuine comet 20 and comet 30 then against Chinese copy's of both, then a well tuned comet 20 and 30 with the lighter weights and the 30 first having the lighter weights and an overdrive spacer and then without the spacer. and repeat all the tests with both 6 and 7 inch driven clutches and 3 different gearing's ( high, medium, low) for each set up. then throw in a run against a properly set up salsbury 340 racing edition just for good measure.
as far as the test
bike they should use just 1
bike and it needs to be a fully built up big cam high rpm racing motor for best results and it should be fully broken in for best accuracy the testing it should be done on a long strait flat track, a drag strip type setup if at all possible. and the motor should be setup with a tachometer and top speed should be checked as well as time taken to go set distances you may encounter in a race or on the trail 50, 100, 150, 200 feet and so on. it might also be good to check these with several different riders with different weights from light to very heavy.
this may seem extreme but this would prove beyond a shadow of a doubt which setup is the best.