hey guy

i have a mc21 chassis and i am putting a mc 16 motor in coz i already have tho motor and cant find a mc21 motor.

it basicly fits in but how will i make sure it is centered and balanced weight wise in the bike so the bike doest become uneven when riding?

will i be able to change cyclinders to later model ones? any benifits?

will i be able to put some performace pipes on it along with reeds and airbox mod?

what will i do with the GPS coz the mc16 doesnt have one?

any other tips are welcome.

thanks for any help
mike