ok so I deleted tors,oil injection and parking brake.... running klotz 2 cycle oil 40:1 mix.... got a new NGK plug in it... it is stock as for as I know... runs great, usually starts first kick!idles fine and goes through the gears fine with plenty of power... so here is my problem! it will run perfectly normal for 15 to 20 min and then it acts like it loses spark or gas and just dies... imeadiatly after dying I can kick it and will start right back up just as normal but then die again after a short ride, and has been backfiring every once in a while... this last time I rode it... it backfired and wouldn't start back up... I am new to the forum and this is the first blaster I have ever owned please help me out