If your putting a dr kit on I’d 100% for sure put a new crank in. I’ve seen a few snap that used the stock crank and kit combo and the variator and clutch bell took off never to be seen from again. Save yourself the pain and do it right the first time. Also the dr is A great choice for your hobbit! If you don’t want to fuss with the stock carb I really like this setup on dr https://www.treatland.tv/honda-hobbit-carb-UPGRADE-pack-vm20-p/hobbit-carb-pack-vm20.htm
Makes jetting a breeze on hobbits!