cbecker301
New Member
Hi! I have a quick question for you all. I was wondering if there was a way to determine engine RPM based off of speed and the gear ratio that I am running on my 2 stroke 49cc motor bike. I would like to start some experiments to see which gear ratio would give me the optimal speed (around 35 - 40 mph) but in order for me to determine which sprocket I should buy, I need to know the engine RPM. If any of you know of any mathematical formulas or advice to help me solve this problem that would be great! I was tinkering around on the gear ratio calculator posted in the performance section as well. Thank you for your help!!