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MY YAMAHA DTR 125 PAWER VALVE ?

MY YAMAHA DTR 125 O3 REG PAWER VALVE DOES NOT WARK YOU CAN BE ON BIKE RIDEING IT FOR 1HR OR SO THEN IT PICKS UP AND GO,S LIKE STINK FOR 2 MINS THIN ITS BACK TO SLOW CAN YOU HELP THANKS
DAVEYLISH, July 2008
change your spark plug it sounds like what mine was doing and its much better now

v6xtreme, August 2008
link Click here to see other fixes for Yamaha 125.