I purchased a blown up 2002 Mountain 500 APV carb sled from a friend for $200. Sled is in great shape except both cylinders are shot beyond repair. I then found a nice 2002 ZR600 APV carb engine for a great price. My question is, do i need to find a 2002 ZR600 CDI to swap with the engine? Or will the 500 CDI work also. Going to be used primarily for ice fishing and short trail use.