Medium spring 3.0 mm

Special steel Medium spring 3.0 mm 1/5 On road

Recommended minimum preload at 0.7, maximum 1.3 +/-. 

The pre load changes depending on some parameters:

-engine power 

-engine capacity 23 cc/ 26 cc / 29 cc

-different use of rollers art 150270 or 150280 

-different shimming of the bell clearance art 150300

-different shimming between art 150200 and bearing art 500140 positioned under the bell housing