Yeah too much money for two bikes which will see occasional use at best.
I did pull of the the 52 tooth chainwheel from my old bike and eyed it up against the origional Tokyo chainwheel.
It will definately fit (by which I mean I can weld the 52 chainring to the 48 tooth) which will give me another 11% upgear. The chain will not hit the frame with this size gear at least.
I will put a call out to my bike shop friends to keep an eye out for parts..I have two Tokyos and want to upgrade both chainwheels cus my Wife will be mad if mine is faster than hers..
Frank