Hello all, well I a proud new owner of a 2002 RS Warrior. well my front cylinder does not have any compression when I do the test. I unplugged the decompression solenoid, and had the throttle on full open to test and … Zero psi. the back one is at 125 PSI. the bike was backfiring on start up and on throttle down. the front cylinder was cold unless I gave it throttle up to 2500 Rpms. it has new coil and spark plugs on it and the backfire is still there.