Gents, i have a 96 fatty as per the title. 

The bike i bought is dead stock, and was going to polish the existing calipers, until i noticed that the newer bikes have 4spot? calipers, which makes me wonder if it's possible to upgrade my bike with the later brakes? or is it more trouble than its worth? personally i like the idea so i can get a bigger pad/ contact surface. if it is possible, would the existing plumbing/ brake lines be OK, and the master cylinder diameter be ok?

Would upgrading to aftermarket calipers be a better bet ?

Sorry if these questions have been asked before, but i had a look and found not too much.

Thanks for any replies in advance, cheers.

Can't go past

Performance Machine
6 piston fronts, 4 piston rear

thanks for the reply Crowy.

Is it possible to use the factory 9/16 master cylinder which is new, or is that needing the boot too? where would the best place be to get the bits? ebay US? or someone in AUS supply the right gear?

sorry about all of the Q's, im new to this game. cheers

stay away from ebay/no name generic crap. They all leak as they are made in china from very poor quality alloy. Either use a gen HD or Performance Machine one. If your making the power to need top end brakes, the larger 13" rotor and 6 piston from PM is a very good combo. Otherwise a 4 piston and floating rotor will do fine.  Stock Master cylinders still work well with the 6 piston.

T1

theres a guy on ebay us that sells bembo 4 spot with adaptor plate to suit softail $190 plus shipping i got one about 8mths ago fits the bike great comes with pads but i upgradad them to lyndell pads no master mods cant say how good it is for sure havnt riddin new bike yet still recovering from a accident not sure if the pm calipers are legal in oz something to do with no dust sills for insurance sake road regs maybe choppawezza knows ? as for the rear i went 2000 + std harley 4 spot  but i did change swing arm to go 160 tyre

edit

hes name is taraqtmi ebay usa has good feedback had no probs with him just search brembo caliper

All the main brand 4 Pistons use the same size Pistons You carnt go wrong with Willwood, HHI, PM , Attitude Inc, or Rev Tec, but if your bike is a 96 you will need to stick with EVO fitment, anything late model will not bolt on to your
bike

cheers all for the great advice.

I know the questions are probably obvious to most, but i'm a first time player to the HD brand and i know i'm not about to gamble in the anchor department.

stay tuned for more newb questions like this.

thanks again, cheers

forgot to mention the calper i recommend is the same as late model victory 4spot