Ok, a I've recently been doing work on the wr and have ran into problems. I have the fmf powercore4 slip on w/ stock header and have recently taken it off to get to my linkage & replace bearings. Anyway, after reinstalling my fmf I had an exhaust leak at the mid pipe connection. That caused popping and backfiring until it finally cut out all together. Well I went back with a hammer and got a better seal I thought, bike ran fine for a little over a week until the same thing happend, popping & motor cuts out. I've put her in the garage and removed the fmf pipe & reinstalled the stock exhaust to see if it was an exhaust problem again. Now I've got no compression when I kick the motor there's nothing there. I can crank it over with my hand & the battery is dead from trying to use the e-start too much. Any help trouble shooting my problems would be appreciated.