View Single Post
Old 05-12-2014, 09:51 PM
rackemblue's Avatar
rackemblue rackemblue is offline
Motorized Bicycle Senior Member
Join Date: Jan 2014
Location: Orange,Tex
Posts: 72
Default Re: Pull starting a chinagirl

The main reason all motors run better after they have warmed up is mainly due to the fact that pistons are not completely straight up and down the sides of the pistons. If you mic one you will find that the pistons are smaller diameter at the top than the bottom and they are made that way because heat on the top of the piston causes it to expand more than the bottom. So until they have warmed up and the pistons have expanded they loose power until proper expansion increases compression. rackemblue
Reply With Quote