Free 2 Stroke Calculators

30 mini calculators are on one spreadsheet downloadable from

You don’t even need Excel on your computer/phone. Just go to and make a free account, enter and click on Excel, Blank Workbook, One Drive, My Files/(folder on your computer to look for the spreadsheet you want to use), Upload Files, then after it is uploaded into your One Drive just double click on it to use it on-line.

Very cool, thanks! :checkered_flag::racing_car:

Free Also -
Keihin Needle Decoder available from Keihin Needle Decoder
Analyzer Of Needle Clearance available from Analyzing Needle/Jet Clearance