Thanks Burner ,
I can pick up my bike with not much difficulty , but I reckon 4 cylinder bikes are more top heavy ( high C of G ) which is the crux of the weighty issue .
Yeah I know sportbikes aren't learner bikes , I have been riding 7 years ( more if scooters included ) and mine is pretty slow and I find the RD350 within my scope . I have friends who've ridden Hayabusa's and Blackbirds , CBR600s , they say as long as one doesn't open throttle too fast , they'll be fine . Just a matter of discipline and concentration .
Hopefully a friend will arrange for me to ride a CBR600 soon , but it'll be very long before I buy one of my own .