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Ohh Could anyone look it up for me?? I cant find it... Its a 1986 Yamaha Tri Z 250... An Those Calculations Dont Include weight an friction into the situation. But I thank you all for helping :wai:

Yeah Well stock gearing is 13/42...with 22 in tires... i just dont thnk it will have much speed.. :/:ack2:

Whats the back sprocket size an front too?

Im building a go kart with a YTZ250 2 stroke engine. I want it to have good acceleration with a fastt Top speed. I have 16in tires.an the drive sprocket is a 15Tooth but can be changed if needed. Please help I was kinda thinkn of using to jack shaft set ups to have a real good top end an good...