I believe there is about 170,000 km on the motor. I will be sure to run a compression test and see where I'm at. I can't get at it for now so it'll have to wait. In all honesty, I just chose the thumpr because I heard they give the engine a nice lope and had decent performance. I really don't know too much about cams. I'll look into hydraulic rollers but I don't think it'll fit into my budget. Any suggestions for rollers? Alright, I have a push rod length checker in my wishlist on summit. Thanks for the input my friend.