don't worry, you'll have tons of fun with it.
just set it up so it's not all to agressive.
different throttle cam, needle, some adjusting of the power valve, heavier flywheel weight... those are all options to alter the caracter of your engine.
just give it a go and give yourself some time to adjust to it.
maybe you won't even have to adjust too much because you might like it as is.
afterall,all that counts is that you can go and ride, right?
ciao, Hannes.