YAMAHA Complaints

THE BATTERY HAS LEAKED, SPILLING ACID AND CAUSING CORROSION TO MAJOR SUSPENSION AND DRIVE COMPONENTS OF THE MOTORCYCLE. THE REAR SWINGARM, SHOCK RESERVOIR, CHAIN, AND REAR SUBRAME ALL HAVE CORROSION.*AK

BATTERY BOIL AND ACID LEAKS ALL OVER SWING ARM, FOOTPEG, CHAIN ETC. IT'S A RECURRENT PROBLEMS AND DEALERSHIP REFUSES TO ADMIT THAT THE PRODUCT MIGHT BE DEFECTIVE.*AK

ONLY HAD THE BIKE FOR 2 MONTHS AND NOTICED A LEAK (BATTERY ACID)COMING FROM UNDER THE DRIVERS SEAT WHICH IS WHERE THE BATTERY IS LOCATED. A WHITE LIKE SUBSTANCE IS FORMING ON THE SWINGARM, CHAIN, AND SHOCK. CALLED DEALERSHIP SAME DAY OF NOTICE. PROBLEM NOT RESOLVED AS OF YET.*AK

WHILE CONSUMER WAS DRIVING PASSING LIGHTS FELL OFF WHEN METAL PIECE BROKE AT THE HANDLES. CONTACTED DEALER, AND THE DEALER WAS NOT WILLING TO DO ANYTHING.*AK

BATTERY LEAKED ACID OUT OF BATTERY, DOWN THE TRAY AND ONTO REAR SHOCK, REAR SWINGARM AND CHAIN. METAL HAS BEEN ETCHED ALL OVER AND RUINED.*AK

I HAVE EXPERIENCED PROBLEMS WITH THE OPERATION OF MY FOUR WHEELER BOTH RELATED TO A NEAR STALLING PROBLEM WHEN GOING UP AN INCLINE AS WELL AS BOILING GAS IN MY GAS TANK. I WAS NOT INJURED, HOWEVER IF THE MACHINE HAD NOT RECOVERED FROM SPUTTERING AND LOSING ALL POWER I FEAR I MAY HAVE BEEN INJURED BADLY BY ROLLING OVER BACKWARDS. AS I MENTIONED I HAVE ALSO EXPEREINCED BOILING GAS COMING FROM EITHER MY GAS TANK OR MY CARBURETOR, NOT SURE WHICH. IF GAS GETS HOT ENOUGH TO BOIL I AM SURE THE FLASH POINT IS NOT THAT FAR OFF. I HAVE READ COUNTLESS ACCOUNTS OF OTHER 660 GRIZZLY OWNERS ON VARIOUS WEB SITE'S FORUM SECTIONS UNDER "YAMAHA" RELATED TO ATV'S SUCH AS WWW.HIGHLIFTER.COM, WWW.ATVNATION.COM, AND WWW.ATVCONNECTION.COM. THERE HAVE BEEN MINOR INJURIES AS A RESULT OF THESE SAME MECHANICAL FAILURES AS I HAVE EXPERIENCED. GOD FORBID THAT MY WIFE SHOULD EXPERIENCE THE SAME PROBLEMS THAT I HAVE WHILE SHE IS RIDING THE MACHINE OVER THE SAME TYPE OF RIDING CONDITIONS, WHICH WERE VERY NOVICE RIDING CONDITIONS, UNLESS THERE IS A FAILURE OF THE MACHINE TO OPERATE. SOMETHING NEEDS TO BE DONE ABOUT THIS PROBLEM IMMEDIATELY BEFORE SOMEONE IS BADLY INJURED OR KILLED.*AK

ORIGINAL BATTERY LEAK APPEARED 03/03/2002, YAMAHA FIXED UNDER WARRANTY. THEY REPLACED SWINGARM, SHOCK (BOTH ACID DAMAGED) AND REPLACED BATTERY. SECOND BATTERY LEAK APPEARED 07/12/2002. SAME PROBLEM. BIKE NOW OUT OF WARRANTY. CONTACTED YAMAHA, THEY DIDN'T SEEM TO CARE. BATTERY LEAKED ON SWINGARM, CHAIN, SHOCK. CHAIN COULD BREAK BECAUSE ACID HAS BEEN EATING ON IT. YAMAHA HAS BEEN NON RESPONSIVE. AS FAR AS I AM CONCERNED, THEY NEED TO FIX THIS PROBLEM, BECAUSE THE ORIGINAL REPAIR ONLY LASTED 4 MONTHS. THIS COULD LEAD TO A DISASTER BEAUSE BATTERY IS DIRECTLY LOCATED UNDER DRIVERS SEAT, ACID DRIPS DOWN ONTO CHAIN WHICH COULD BREAK UNDER LOAD, AND ACID CAN GET ONTO REAR TIRE, CAUSING AN ACCIDENT.*AK

HAVE REPLACED THREE BATTERIES AND A VOLTAGE REGULATOR- DO NOT KNOW IF PROBLEM IS EVEN FIXED. BATTERY ACID HAS ALSO CORRODED MY SWINGARM AND COMPONENTS UNDER MY SEAT.*AK

ON THIS THE FIRST YEAR OF THE NEW MODEL OF THE YAMAHA GRIZZLY 660, DUE TO THE DESIGN OF THE ENGINE COMPARTMENT, THERE IS A PROBLEM WITH THE ENGINE VAPOR LOCKING DUE TO THE GASOLINE IN THE FUEL TANK AND CARBURETOR BOILING. WHAT HAPPENS IS WHEN YOU ARE DOING SOME SLOW TECHNICAL TRAIL RIDING, THERE DOESNT SEEM TO BE SUFFICIENT VENTILATION TO KEEP THE ENGINE COMPARTMENT COOL. BECAUSE OF THIS, THE FUEL ACTUALLY BOILS. YOU CAN TAKE THE GAS CAP OFF THE FUEL TANK AND HEAR THE PRESSURE RELEASE, THEN LOOK IN THE GAS TANK AND ACTUALLY SEE, AND HEAR THE GASOLINE BUBBLING (BOILING).*AK

DISCOVERED FOREIGN MATERIAL ON SHOCK ABSORBER AND SWING ARM. TRACED SOURCE TO LEAKAGE FROM SMALL HOLES IN BATTERY.