The pink cylinder head is OE Polaris, they used a lot of pink. That particular setup was three Mikuni carbs, look to be 34s, but later versions used a rudimentary EFI setup. No battery, no starter, but fairly reliable if you could pull them over far enough. They needed about three revolutions in a row to actually start. That actually looks like an awesome setup, I nearly put an A/C 500 twin on my Honda MT250 chassis. I may throw it on my Yamaha DT400 if I can't find a good jug for it-