timing chain

Hi, I just bought a used KTM 525exc 2005. Sort of a beginner when it comes to dirt bike engine issues especially with a 4 stroke. The bike runs and rides okay but I have trouble starting it as it just has way too much compression, and some times I even feel like I'm chipping off kickstarter...

I just bought a 2006 Rmz 450 and I take it out for a ride and their is oil leaking out of the cylinder head so I take the head apart to find that the head bolts are not stock and heli-coiled to fit the smaller bolt! So I get the bolts out and take the cam cap out and then I purchased the...