Yep, COP is the way to go, but it's slightly more difficult on your '85 since you have the old style analog ignition. Hooking up COPs directly to the coil leads will burn out the box in short order since COPs have a lower resistance than the stock coils. You need inline resistors. Gannon (88vmx12) made some adapter harness kits with resistors built in, not sure if there's any left, I'd ask him. Then it'd be a plug and play swap. Not that my bike was hard to start before, but after COPs it fires noticeably quicker...just tap the starter and on the first compression it pops.
A set of 4 coil sticks can be found on ebay for $20-$50. Don't pay any more than that. Yes, they're like $100/apiece dealer list, sellers try to convince you that $200 for four is therefore a stunning deal. I paid $25 shipped for a set of 2009 GSXR 600 coil sticks.
COPs are pretty standard. They all use the same connector and are pretty much all the same size and length regardless of brand of what bike they came off. Avoid sticks from Honda 9xx series bikes, they're considerably longer and are tough to fit on the Max. All others are shorter and fit easily.