just wondering..would a 87 kx 250 carb fit a 87 tecate 4? in need for one and it seems i can get one off a friend's bike. also can get a 250r carb. what size carb should i be going with for best results? 38,39.34,mikuni,keihin etc? what carbs should i be looking into?? just got it 2 days ago. kind of new at this lol. any help would be . thanks.