Thanks for the info guys, sorry it's taken me so long to reply back, have just got Black Budgie back on the road.
Those numbers aren't as short as I would have thought actually so it still should remain quite driveable.
I'll have to keep my eyes and ears open for any gear-sets etc that might happen to present themselves in the near future. Until then though, she's plenty quick enough to keep me entertained at least for the near future anyway