Dirt Bikes Engine

How hard is it to rebuild engine dirt bike
on a scale of 1 to 10 how hard is to rebuild 2 stroke 125cc engine
MAINLY DEPENDS ON YOUR ABILITY AND KNOWLEDGE MECHANICS HOW.ALSO need the right tools and PARTS.SO If you consider yourself MECHANICALLY RIGHT mind, I would say 7.BUT You never know until you try BOUT THE CAPS Sorry.
Dirt Bike Engine On Gokart (Part 3)