Part #17 on the Clutch Diagram
The main clutch spring is a thick, black compression spring that is located over the clutch shaft between the two 202 main bearings on all 2-stroke bicycle engines. This spring is not to be confused with the thin tension/extension clutch spring sometimes found located on top of the clutch cover on some older make and models. This spring is much larger, thicker and does not compress easily. A near complete disassemble of the gas bike engine may be required to replace this part given its location in the center of the clutch.
Main Clutch Spring
Part Number (See Parts Manual): Clutch-17