1999 YAMAHA YAMAHA Engine And Engine Coolingenginegasoline Problems

I RIDE THE MOTORCYCLE UNTIL THE ENGINE HAS REACHED NORMAL OPERATING TEMPERATURE AND THEN PARK IT AND SHUT OFF THE ENGINE. AFTER A FEW MINUTES WHEN I PUSH THE STARTER BUTTON GASOLINE POURS FROM THE CARBURETOR ONTO THE HOT ENGINE. THIS CONTINUES UNTIL I RELEASE THE STARTER BUTTON. THE ENGINE WILL NOT START WHILE THE GASOLINE IS SPILLING ONTO THE ENGINE. AFTER LETTING THE MOTORCYCLE COOL FOR A FEW MINUTES, SOMETIMES IT WILL THEN START OR THE GASOLINE WILL AGAIN POUR ONTO THE HOT ENGINE. YAMAHA MOTOR COMPANY HAS ACKNOWLEDGED THE THIS IS A PROBLEM ON THIS MODEL OF MOTORCYCLE WHEN RIDDEN IN HIGH ALTITUDE SITUATIONS. I HAVE HAD THE PROBLEM IN COLORADO, PHEONIX AZ, EDMONTON AB CANADA, AND NORTH CAROLINA. THE DEALERSHIP, UNDER DIRECTION FROM YAMAHA, HAS REPLACED THE CARBURETOR AND FUEL PUMP. THIS HAS NOT FIXED THE PROBLEM AS IT REOCCURED ON 02/27/2000. I WILL CONTINUE TO WORK...

MOTORCYCLE BEGAN BACKFIRING AT ABOUT 2000 MILES. SHAWNEE CYCLE SALES, WHICH WAS NOT THE SELLING DEALER, SAID THE CARBS HAD BEEN ADJUSTED PREVIOUSLY (APPARENTLY BY THE SELLING DEALER AT THE 600 MILE SERVICE. THEY THEN ATTEMPTE A FIX, IT DIDN'T WORK AND 2 WEEKS LATER I TOOK IT BACK. THIS WAS THE 2ND ATTEMPT BY SHAWNEE, PLUS THE ONE ADJUSTMENT AT 600 MILES, FOR A TOTAL OF 3 ADJUSTMENTS. THE MOTORCYCLE CONTINUE S TO BACKFIRE. THE MANUFACTURER IS NO HELP, ALL THEY SAY IS TAKE IT BACK TO THE DEALER, THE DEALER WON'T EVEN LOOK AT IT FOR 6-8 WEEKS. THE MFR CLAIMS THEY HAVE NEVER HEARD OF THIS, YET MANY OWNERS HAVE MADE THE SAME CLAIM. THIS MOTORCYCLE HAS A 5 YEAR WARRANTY, AND THEY ARE NOT STANDING BEHIND IT.

ENGINE CONTINUALLY MAKES NOISE. MJS

I HAVE A SEVERE ENGINE KNOCK IN MY MOTORCYCLE. I'M AFRAID TO RIDE IT AS I FEAR THE ENGINE MAY SIEZE AND CAUSE INJURY. *AK.