Hello everyone, im new here, and i want ask about carburetor size and jets sizes. I have Yamaha DT 50 MX 1991r. I have Airsal 70ccm cylinder, and Dellorto PHBG 21 carburetor, i buyed motorbike on that configuration, so i want ask that carburetor isnt too big for that cylinder, and also what you think what jets size i should use on it to get best performance, i read many topics and almost on everyone guys says 17,5mm carburetor are the best for 70ccm. Should i buy new carburetor ? Motorbike works, also i have unlocked cdi unit, but max speed what i get its about 55-60km/h. That speed are everythink what i can expect ?
PS. sorry if i my question are dumb but this is my first contact with motorbikes.