200S engine mod??

[AbusedBigRed]

Hello im looking for an HP gain for my 200S, thinking about a xr 200 cam and carb , wich year should I look for? Or is there any better mod?
Thanks!

[YTZ drew]

Any year of the 2 valve xr200 can donate the carb and can, but get the intake manifold too. The bigger carb doesn't fit the atc intake correctly.

[ironchop]

You can also use aftermarket cams from Web Camshaft or Megacycles that are manufactured for the 83-85 ATC200X in that 200S

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[125Mmadness]

If your going to do the carb and cam you might as well throw in a high comp piston like from a 200x or xr200