The COPS design has just been updated to make the transition from pull-start to non-pull-start much easier and cost saving.

On the previous version of the COPS design, to change from pull-start to non-pull-start, the user will have to replace both the crankshaft and the end cap. But the new design has allowed the user to keep the original crankshaft (cost saving) and replace only the pull-start with an end cap. 

Please check the updated instruction manuals below.

Hyper 21 Engine Manual (COPS)-20160524

Hyper 30 Engine Manual (COPS)-20160524

Mac 28 Engine Manual (COPS)-20160524