1st Hello Everyone!, long time reader...1st time poster. Purchased my son a used 03' KX85 a couple months ago....he has ridden it 7 or 8 times now and is getting a little braver each lap....his bike was bogging down in the low end so I decided to replace the reeds and re-jet the carb. Boysen - Power Reeds Re-Jet - 138 Main - 42 Pilot (from stock 140 - 45) NAPE Needle 2nd position removed cleaned and Repacked Pro circut R304 silencer Well now I cant get it started (Bruised my foot trying to get it to crank !) Started a couple times and ran breifly, still bogged on the low end - ran great up top, but started sputtering, then backfired a few times and died. Like i said ran breifly......now I cant even get it to think about firing, when I did try it sounded like it was loaded up, give it a little throttle chokes and dies...... What I've done since and what has been checked. New Plug (tried 2) Removed cleaned the carb (twice) all passages (air and carb cleaner) Put the old reeds back in - No difference - reinstalled the power reeds Spark tested - OK Plugs are Wet Silencer is open (packing didnt get caught up in it - still wide open Changed the gaskets, O-rings and springs on the exhaust manifold. New Air filter Checked Compression (155psi) Could the backfire have damaged the stator Key or could this thing get out of sync? I say I have spark - it aint a lightning bolt, but still visable - How can I check if I'm getting enough juice to the plug? What can I do to rule out the kill switch - just disconect the wires ? Any help or suggestions would be greatly appreciated...Thanks!