This Problem Across All Years
OUTSIDE TEMPERATURE: 95+F, SUNNY, CLEAR NO PASSENGER, JUST DRIVER JUST PULLED INTO THE DRIVEWAY AFTER AN 60 - 90 MINUTE RIDE. SHUTDOWN MOTORCYCLE. RAW GASOLINE, LEAKING FROM THE CARBURETOR, DRIPPING ONTO THE ENGINE AND EXHAUST PIPES. AMOUNT OF GAS EXPELLED ONTO THE ENGINE, I WOULD ESTIMATE 2OZ - 4OZ. FUEL DELIVERY SYSTEM WAS STOCK AT THAT TIME. NO MODIFICATIONS MADE PRIOR TO THE INCIDENT. READ ON INTERNET FORUMS FOR THIS MOTORCYCLE, THIS IS A COMMON ISSUE FOR THIS BRAND OF MOTORCYCLE. DESCRIPTION OF FUEL DELIVERY SYSTEM. FROM TANK - THROUGH FUEL FILTER - TO ELECTRONIC FUEL PUMP - TO CARBURETOR INLET. FUEL LINE IS RUBBER 5/16" FUEL HOSE FROM TANK - TO FILTER - TO PUMP. METAL FUEL LINE FROM FUEL PUMP TO CARBURETOR. METAL FUEL LINE WAS WRAPPED IN 2,000 DEG F HEAT PROTECTIVE TAPE. THIS METAL FUEL LINE RUNS IN BETWEEN THE CYLINDER HEADS OF THE V-TWIN ENGINE FROM THE FUEL PUMP TO THE CARBURETOR. THIS FUEL SYSTEM IS UNDER CONSTANT PRESSURE FROM THE FUEL PUMP TO THE CARBURETOR. ENGINE HEAT EXPANDS THE COOLER FUEL IN THE FUEL LINES AND CARBURETOR, RESULTING IN FUEL EXPANSION AND BOIL. AS A RESULT, RAW FUEL EXPANDS AND SEEKS ITS WAY OUT OF THE CARBURETOR AND ONTO THE ENGINE AND EXHAUST PIPES. THERE IS NO PRESSURE RELIEF EXCEPT FORCING THE FUEL OUT OF CARBURETOR. OWNER CORRECTIONS / MODIFICATIONS TO PREVENT FUTURE INCIDENTS OF RAW GASOLINE POURING ONTO THE HOT ENGINE AND EXHAUST PIPES. 1. RELOCATE FUEL PUMP TO RIGHT SIDE AWAY FROM ENGINE, REMOVE AND DISCARD METAL FUEL LINE. UTILIZE 5/16 RUBBER FUEL HOSE, WIRE SPRING HOSE PROTECTION, DOUBLE INSULATE WITH 2,000K HEAT PROTECTIVE TAPE. THIS NEW LINE RUNS IN BETWEEN THE CYLINDER HEADS TO THE CARBURETOR. 2. ALTERNATE GRAVITY FED FUEL SYSTEM FIX, INCREASE SIZE OF FLOAT BOWL NEEDLE AND SEAT. REPLACE FUEL PETCOCK WITH HIGH FLOW PETCOCK. VENT STOCK GAS CAP. REMOVE FUEL PUMP. *TR
OUTSIDE TEMPERATURE: 95+F, SUNNY, CLEAR NO PASSENGER, JUST DRIVER JUST PULLED INTO THE DRIVEWAY AFTER AN 60 - 90 MINUTE RIDE. SHUTDOWN MOTORCYCLE. RAW GASOLINE, LEAKING FROM THE CARBURETOR, DRIPPING ONTO THE ENGINE AND EXHAUST PIPES. AMOUNT OF GAS EXPELLED ONTO THE ENGINE, I WOULD ESTIMATE 2OZ - 4OZ. FUEL DELIVERY SYSTEM WAS STOCK AT THAT TIME. NO MODIFICATIONS MADE PRIOR TO THE INCIDENT. READ ON INTERNET FORUMS FOR THIS MOTORCYCLE, THIS IS A COMMON ISSUE FOR THIS BRAND OF MOTORCYCLE. DESCRIPTION OF FUEL DELIVERY SYSTEM. FROM TANK - THROUGH FUEL FILTER - TO ELECTRONIC FUEL PUMP - TO CARBURETOR INLET. FUEL LINE IS RUBBER 5/16" FUEL HOSE FROM TANK - TO FILTER - TO PUMP. METAL FUEL LINE FROM FUEL PUMP TO CARBURETOR. METAL FUEL LINE WAS WRAPPED IN 2,000 DEG F HEAT PROTECTIVE TAPE. THIS METAL FUEL LINE RUNS IN BETWEEN THE CYLINDER HEADS OF THE V-TWIN ENGINE FROM THE FUEL PUMP TO THE CARBURETOR. THIS FUEL SYSTEM IS UNDER CONSTANT PRESSURE FROM THE FUEL PUMP TO THE CARBURETOR. ENGINE HEAT EXPANDS THE COOLER FUEL IN THE FUEL LINES AND CARBURETOR, RESULTING IN FUEL EXPANSION AND BOIL. AS A RESULT, RAW FUEL EXPANDS AND SEEKS ITS WAY OUT OF THE CARBURETOR AND ONTO THE ENGINE AND EXHAUST PIPES. THERE IS NO PRESSURE RELIEF EXCEPT FORCING THE FUEL OUT OF CARBURETOR. OWNER CORRECTIONS / MODIFICATIONS TO PREVENT FUTURE INCIDENTS OF RAW GASOLINE POURING ONTO THE HOT ENGINE AND EXHAUST PIPES. 1. RELOCATE FUEL PUMP TO RIGHT SIDE AWAY FROM ENGINE, REMOVE AND DISCARD METAL FUEL LINE. UTILIZE 5/16 RUBBER FUEL HOSE, WIRE SPRING HOSE PROTECTION, DOUBLE INSULATE WITH 2,000K HEAT PROTECTIVE TAPE. THIS NEW LINE RUNS IN BETWEEN THE CYLINDER HEADS TO THE CARBURETOR. 2. ALTERNATE GRAVITY FED FUEL SYSTEM FIX, INCREASE SIZE OF FLOAT BOWL NEEDLE AND SEAT. REPLACE FUEL PETCOCK WITH HIGH FLOW PETCOCK. VENT STOCK GAS CAP. REMOVE FUEL PUMP. *TR
MY 2006 YAMAHA SILVERADO 1700 THAT ONLY HAD 4,700 MILES ON IT WHEN I GOT IT 10/2009 PUKES FUEL FROM THE CARB ALL OVER THE HOT MOTOR POST HOT SHUT DOWN WHICH S A FIRE HAZARD I DIAGNOSED IT TO EXTREME HEAT ISSUES WITH CARB & FLOAT BOWL OVERHEATING / METAL FUEL LINE INBETWEEN THE CYLS/ OVERHEATING/ METAL BODY OF ELEC F-PUMP OVER HEATING ALL FROM THE EXCESSIVE HEAT PRODUCED BY THE LRG 1700CC V-TWIN AIR COOLED MOTOR AND YAMAH NOT PROPERLY /FULLY INSULATING THE COMPLETE FUEL SYSTEM WITH A HI TECH HI TEMP INSULATING MATERIAL TO PROTECT THE IT FROM THE EXCESSIVE HEAT AND STOP THE CARB PUKING FUEL WHEN HOT. I INSULATED MY BIKES COMPLETE FUEL SYSTEM WITH A HIGH TECH SPACE AGE 2,000 DEG INSULATING MATERIAL USED IN AUTO RACING APPS. THAT INCLUDED TRIPLE LAYERING IT ON THE METAL FUEL LINE THAT RUNS INBETWEEN THE CYLS ALONG WITH INSULATING THE CARB FLOAT BOWL & CARB MAIN BODY WHERE IT WOULD NOT INTERFERE WITH THROTTLE CABLES ETC . I ALSO INSULATED THE FUEL FILTER & ASSOCIATED FUEL LINES TOO. WITH STOCK FUEL PUMP COVER INSTALLED AND LRG STOCK AIR CLEANER ASSEMBLY YOU CANT SEE MOST OF THE INSULATING MATERIAL ACCEPT FOR WHERE ITS ON THE FUEL LINES ON F-PUMP & FUEL FILTER. DONG THAT FIXED MY BIKE PUKING FUEL 4 OF EVERY 5 TIMES I SHUT IT DOWN HOT EVEN WITH F-PUMP OFF AND IGN SW OFF. I HAVE ALSO SINCE RUN IT IN 95 DEG HH TEMPS WITH NO CARB PUKING FUEL AT ALL. IF YAMAH STEPPED UP TO THE PLATE AND DID THIS 1.5HR /$20 PROCESS I PUT TOGETHER THEY COULD EITHER STOP ALL CARB PUKE ISSUES OR AT LEAST GREATLY REDUCE IT . THE CARB PUKING RAW FUEL, ONTO THE HOT MOTOR IS A REAL SAFETY ISSUE TOO. WHEN IT DID IT ON MY BIKE IT MADE A HISSING SOUND AND WHITE SMOKE WAS COMING FROM THE FUEL HITTING THE HOT MOTOR AND PUSHROD TUBES LOOKING LIKE IT WAS GOING TO IGNITE ANY SECOND WITH 5 GALS OF FUEL JUST WAITING TO GO UP WITH IT SITTING RIGHT ON TOP. NICE DESIGN WORK FROM YAMAHA THAT WONT TAKE RESP FOR CORRECTING IT SINCE THEY KNOW WHAT ISSUES ARE WITH TODAYS PUMP FUELS WITH RESPECT TO HEAT ISSUES. *TR
MY 2006 YAMAHA SILVERADO 1700 THAT ONLY HAD 4,700 MILES ON IT WHEN I GOT IT 10/2009 PUKES FUEL FROM THE CARB ALL OVER THE HOT MOTOR POST HOT SHUT DOWN WHICH S A FIRE HAZARD I DIAGNOSED IT TO EXTREME HEAT ISSUES WITH CARB & FLOAT BOWL OVERHEATING / METAL FUEL LINE INBETWEEN THE CYLS/ OVERHEATING/ METAL BODY OF ELEC F-PUMP OVER HEATING ALL FROM THE EXCESSIVE HEAT PRODUCED BY THE LRG 1700CC V-TWIN AIR COOLED MOTOR AND YAMAH NOT PROPERLY /FULLY INSULATING THE COMPLETE FUEL SYSTEM WITH A HI TECH HI TEMP INSULATING MATERIAL TO PROTECT THE IT FROM THE EXCESSIVE HEAT AND STOP THE CARB PUKING FUEL WHEN HOT. I INSULATED MY BIKES COMPLETE FUEL SYSTEM WITH A HIGH TECH SPACE AGE 2,000 DEG INSULATING MATERIAL USED IN AUTO RACING APPS. THAT INCLUDED TRIPLE LAYERING IT ON THE METAL FUEL LINE THAT RUNS INBETWEEN THE CYLS ALONG WITH INSULATING THE CARB FLOAT BOWL & CARB MAIN BODY WHERE IT WOULD NOT INTERFERE WITH THROTTLE CABLES ETC . I ALSO INSULATED THE FUEL FILTER & ASSOCIATED FUEL LINES TOO. WITH STOCK FUEL PUMP COVER INSTALLED AND LRG STOCK AIR CLEANER ASSEMBLY YOU CANT SEE MOST OF THE INSULATING MATERIAL ACCEPT FOR WHERE ITS ON THE FUEL LINES ON F-PUMP & FUEL FILTER. DONG THAT FIXED MY BIKE PUKING FUEL 4 OF EVERY 5 TIMES I SHUT IT DOWN HOT EVEN WITH F-PUMP OFF AND IGN SW OFF. I HAVE ALSO SINCE RUN IT IN 95 DEG HH TEMPS WITH NO CARB PUKING FUEL AT ALL. IF YAMAH STEPPED UP TO THE PLATE AND DID THIS 1.5HR /$20 PROCESS I PUT TOGETHER THEY COULD EITHER STOP ALL CARB PUKE ISSUES OR AT LEAST GREATLY REDUCE IT . THE CARB PUKING RAW FUEL, ONTO THE HOT MOTOR IS A REAL SAFETY ISSUE TOO. WHEN IT DID IT ON MY BIKE IT MADE A HISSING SOUND AND WHITE SMOKE WAS COMING FROM THE FUEL HITTING THE HOT MOTOR AND PUSHROD TUBES LOOKING LIKE IT WAS GOING TO IGNITE ANY SECOND WITH 5 GALS OF FUEL JUST WAITING TO GO UP WITH IT SITTING RIGHT ON TOP. NICE DESIGN WORK FROM YAMAHA THAT WONT TAKE RESP FOR CORRECTING IT SINCE THEY KNOW WHAT ISSUES ARE WITH TODAYS PUMP FUELS WITH RESPECT TO HEAT ISSUES. *TR
MY 2006 YAMAHA ROADSTAR EXHIBITS FUEL LEAKAGE OUT OF THE CARBURETOR WHEN THE ENGINE IS HOT. THIS USUALLY OCCURS AFTER STOPPING AND THE ENGINE IS WARM AND HEAT SOAKS THE CARB. THIS IS A VERY COMMON PROBLEM WITH THE MODEL. MY CONCERN IS THE POTENTIAL FOR A FIRE WHILE I AM SITTING ON THE MOTORCYCLE. YAMAHA SERVICE REPS HAVE BEEN CONTACTED AND ARE AWARE OF THE PROBLEM BUT YAMAHA DOES NOT HAVE A FIX IN PLACE AT THIS TIME NOR DID THEY SUGGEST THAT THEY WERE WORKING ON ONE. I WOULD HAVE FOR SOMEONE TO BE BURNT OR KILLED AS A RESULT OF THIS ISSUE. *CN
MY 2006 YAMAHA ROADSTAR EXHIBITS FUEL LEAKAGE OUT OF THE CARBURETOR WHEN THE ENGINE IS HOT. THIS USUALLY OCCURS AFTER STOPPING AND THE ENGINE IS WARM AND HEAT SOAKS THE CARB. THIS IS A VERY COMMON PROBLEM WITH THE MODEL. MY CONCERN IS THE POTENTIAL FOR A FIRE WHILE I AM SITTING ON THE MOTORCYCLE. YAMAHA SERVICE REPS HAVE BEEN CONTACTED AND ARE AWARE OF THE PROBLEM BUT YAMAHA DOES NOT HAVE A FIX IN PLACE AT THIS TIME NOR DID THEY SUGGEST THAT THEY WERE WORKING ON ONE. I WOULD HAVE FOR SOMEONE TO BE BURNT OR KILLED AS A RESULT OF THIS ISSUE. *CN
I HAVE DISCOVERED THAT WHEN I SHUT THE ENGINE OFF AFTER RIDING ON A HOT DAY OR AFTER EXTENDED IDLING IN HEAVY TRAFFIC, SOMETHING CAUSES A JET OF GAS TO BE SPRAYED FROM THE RIGHT SIDE OF THE ENGINE BEHIND THE AIR CLEANER COVER, IT FLOWS DOWN THE SIDE OF THE HOT ENGINE VERY NEAR AN EXHAUST PIPE. (HOT ENGINE AND FLOWING GAS NOT GOOD). THE DEALER HAS REPLACED THE FLOAT VALVE AND SEAL. HE IS ORDERING ANOTHER ONE BUT DOESN'T REALLY THINK THAT GOING TO CURE THE PROBLEM. I HAVE BEEN IN CONTACT WITH SEVERAL OTHER YAMAHA MOTORCYCLE OWNERS OF THE ROAD STAR MODEL WITH THE 1700CC ENGINE IN A YAMAHA CHAT ROOM WHO ARE EXPERIENCING THE SAME PROBLEM. YAMAHA IS APPARENTLY DOING NOTHING ABOUT THE CARBURETOR MODELS OF THIS ENGINE BUT WENT TO FUEL INJECTION IN 2007. THIS FUEL EVENT HAS HAPPENED ON SEVERAL OCCASIONS, THE DATE LISTED BELOW IS THE MOST RECENT. THIS CONDITION HAS HAPPENED SEVERAL TIMES SINCE I PURCHASED IT NEW, THE MILEAGE I LISTED IS THE LAST INCIDENT. *TR
I HAVE DISCOVERED THAT WHEN I SHUT THE ENGINE OFF AFTER RIDING ON A HOT DAY OR AFTER EXTENDED IDLING IN HEAVY TRAFFIC, SOMETHING CAUSES A JET OF GAS TO BE SPRAYED FROM THE RIGHT SIDE OF THE ENGINE BEHIND THE AIR CLEANER COVER, IT FLOWS DOWN THE SIDE OF THE HOT ENGINE VERY NEAR AN EXHAUST PIPE. (HOT ENGINE AND FLOWING GAS NOT GOOD). THE DEALER HAS REPLACED THE FLOAT VALVE AND SEAL. HE IS ORDERING ANOTHER ONE BUT DOESN'T REALLY THINK THAT GOING TO CURE THE PROBLEM. I HAVE BEEN IN CONTACT WITH SEVERAL OTHER YAMAHA MOTORCYCLE OWNERS OF THE ROAD STAR MODEL WITH THE 1700CC ENGINE IN A YAMAHA CHAT ROOM WHO ARE EXPERIENCING THE SAME PROBLEM. YAMAHA IS APPARENTLY DOING NOTHING ABOUT THE CARBURETOR MODELS OF THIS ENGINE BUT WENT TO FUEL INJECTION IN 2007. THIS FUEL EVENT HAS HAPPENED ON SEVERAL OCCASIONS, THE DATE LISTED BELOW IS THE MOST RECENT. THIS CONDITION HAS HAPPENED SEVERAL TIMES SINCE I PURCHASED IT NEW, THE MILEAGE I LISTED IS THE LAST INCIDENT. *TR
FUEL SYSTEM LEAKING GAS ONTO HOT ENGINE AFTER BEING DRIVEN. *TR
FUEL SYSTEM LEAKING GAS ONTO HOT ENGINE AFTER BEING DRIVEN. *TR
2006 YAMAHA ROADSTAR CAST - I HAD 4,000 MILES ON THE BIKE. I WAS RIDING IN CONGESTED TRAFFIC ONE DAY AND BEING AN AIR COOLED MOTORCYCLE IT WAS RUNNING A LITTLE WARM. AFTER THE BIKE WAS SHUT DOWN FOR A FEW MINUTES IT FLOODED ON RESTART. I CHECKED THE SIDE OF THE ENGINE AND GASOLINE WAS POURING OUT OF THE AIRBOX ONTO THE STILL HOT ENGINE AND EXAUST. I TURNED THE PETCOCK OFF AND WAS ABLE TO START THE ENGINE BY HOLDING THE THROTTLE OPEN AND CRANKING THE ENGINE FOR A FEW SECONDS. I TURNED THE PECOCK BACK ON AND EVERYTHING SEEMED OK. THE NEXT DAY THE INCIDENT REPEATED AFTER AN EASY RIDE OF 60 MILES IN COOL MORNING AIR. YESTERDAY IT HAPPENED AGAIN AFTER AN EASY RIDE AROUND TOWN IN 60 DEGREE TEMPERATURES. IN LOOKING FOR A SOLUTION I RAN ACROSS A WEB SITE CALLED ROADSTAR FORUM. IT SEEMS THIS IS A VERY COMMON OCCURANCE WITH THIS PARTICULAR MODEL. ESPECIALLY THOSE PRODUCED SINCE 2004. THE DEALER TELLS ME THAT IT IS CARBURATOR PERCOLATION AND NOTHING CAN BE DONE ABOUT IT. MY ARGUMENT IS THAT IT DIDN'T HAPPEN FOR THE FIRST 4000K SO WHY IS IT HAPPENING NOW? THERE IS A DESIGN FLAW OR QUALITY ISSUE WITH THIS MACHINE THAT IS CAUSING THIS VERY DANGEROUS MALFUNCTION. SEVERAL OUNCES OF GASOLINE INSTANTLY VAPORIZED ON A HOT EXAUST SYSTEM COULD CAUSE AN EXPLOSION UNDER THE RIGHT CONDITIONS NOT TO MENTION CATCHING THE BIKE OR IT'S PASSENGERS ON FIRE. IF THIS SITE IS FOR CARS ONLY PLEASE EMAIL ME WITH THE ADDRESS OF THE PROPER AGENCY TO FILE A COMPLAINT. BEST REGARDS, S. WARD *TR
2006 YAMAHA ROADSTAR CAST - I HAD 4,000 MILES ON THE BIKE. I WAS RIDING IN CONGESTED TRAFFIC ONE DAY AND BEING AN AIR COOLED MOTORCYCLE IT WAS RUNNING A LITTLE WARM. AFTER THE BIKE WAS SHUT DOWN FOR A FEW MINUTES IT FLOODED ON RESTART. I CHECKED THE SIDE OF THE ENGINE AND GASOLINE WAS POURING OUT OF THE AIRBOX ONTO THE STILL HOT ENGINE AND EXAUST. I TURNED THE PETCOCK OFF AND WAS ABLE TO START THE ENGINE BY HOLDING THE THROTTLE OPEN AND CRANKING THE ENGINE FOR A FEW SECONDS. I TURNED THE PECOCK BACK ON AND EVERYTHING SEEMED OK. THE NEXT DAY THE INCIDENT REPEATED AFTER AN EASY RIDE OF 60 MILES IN COOL MORNING AIR. YESTERDAY IT HAPPENED AGAIN AFTER AN EASY RIDE AROUND TOWN IN 60 DEGREE TEMPERATURES. IN LOOKING FOR A SOLUTION I RAN ACROSS A WEB SITE CALLED ROADSTAR FORUM. IT SEEMS THIS IS A VERY COMMON OCCURANCE WITH THIS PARTICULAR MODEL. ESPECIALLY THOSE PRODUCED SINCE 2004. THE DEALER TELLS ME THAT IT IS CARBURATOR PERCOLATION AND NOTHING CAN BE DONE ABOUT IT. MY ARGUMENT IS THAT IT DIDN'T HAPPEN FOR THE FIRST 4000K SO WHY IS IT HAPPENING NOW? THERE IS A DESIGN FLAW OR QUALITY ISSUE WITH THIS MACHINE THAT IS CAUSING THIS VERY DANGEROUS MALFUNCTION. SEVERAL OUNCES OF GASOLINE INSTANTLY VAPORIZED ON A HOT EXAUST SYSTEM COULD CAUSE AN EXPLOSION UNDER THE RIGHT CONDITIONS NOT TO MENTION CATCHING THE BIKE OR IT'S PASSENGERS ON FIRE. IF THIS SITE IS FOR CARS ONLY PLEASE EMAIL ME WITH THE ADDRESS OF THE PROPER AGENCY TO FILE A COMPLAINT. BEST REGARDS, S. WARD *TR
WHILE PULLING OUT INTO TRAFFIC, THE MOTORCYCLE 2006 YAMAHA ROADSTAR LOST POWER, BACK FIRED AND ALMOST DIED. THERE WAS TRAFFIC APPROACHING, AND I WAS ABLE TO PULL INTO A DRIVEWAY TO AVOID AN ACCIDENT. THIS HAS HAPPENED MANY TIMES. I HAVE CONTACTED THE LOCAL DEALER , AND WAS TOLD THE STEPS TO STOP THIS FROM HAPPENING. WHAT WAS CAUSING THE PROBLEM WAS A STICKY INTAKE VALVE. THE DEALER STATED , PER TSB FROM YAMAHA, IT WAS DUE TO TOO MUCH OIL IN THE ENGINE, 4.5 QUARTS, WHICH WAS WHAT YAMAHA PUT IN THE MOTORCYCLE , AND THE CARBURETOR WAS SET TO RICH. I DID AS THE TECHNICAL SERVICE BULLETIN (TSB) STATED. I RAN A BOTTLE OF RING FREE THROUGH THE GAS TANK, AND DID AN OIL CHANGE, PUT IN 4.0 QUARTS PER TSB, AND IT WAS RUNNING LEAN, NOT RICH. THE PROBLEM WAS STILL THERE. THE GAS MILEAGE DROPPED AND BACK SPARK PLUGS WERE WET WHEN I REMOVED THEM. *AK
WHILE PULLING OUT INTO TRAFFIC, THE MOTORCYCLE 2006 YAMAHA ROADSTAR LOST POWER, BACK FIRED AND ALMOST DIED. THERE WAS TRAFFIC APPROACHING, AND I WAS ABLE TO PULL INTO A DRIVEWAY TO AVOID AN ACCIDENT. THIS HAS HAPPENED MANY TIMES. I HAVE CONTACTED THE LOCAL DEALER , AND WAS TOLD THE STEPS TO STOP THIS FROM HAPPENING. WHAT WAS CAUSING THE PROBLEM WAS A STICKY INTAKE VALVE. THE DEALER STATED , PER TSB FROM YAMAHA, IT WAS DUE TO TOO MUCH OIL IN THE ENGINE, 4.5 QUARTS, WHICH WAS WHAT YAMAHA PUT IN THE MOTORCYCLE , AND THE CARBURETOR WAS SET TO RICH. I DID AS THE TECHNICAL SERVICE BULLETIN (TSB) STATED. I RAN A BOTTLE OF RING FREE THROUGH THE GAS TANK, AND DID AN OIL CHANGE, PUT IN 4.0 QUARTS PER TSB, AND IT WAS RUNNING LEAN, NOT RICH. THE PROBLEM WAS STILL THERE. THE GAS MILEAGE DROPPED AND BACK SPARK PLUGS WERE WET WHEN I REMOVED THEM. *AK
GAS SEEMS TO BOIL OUT OF THE CARBURETOR AFTER SHUTTING OFF THE MOTORCYCLE WHEN HOT AND OVERFLOWS ONTO THE HOT ENGINE CASE AND EXHAUST. THIS HAPPENS QUITE OFTEN WHEN SHUTTING OFF THE ENGINE WHEN IT IS HOT. VERY SCARY. *AK
GAS SEEMS TO BOIL OUT OF THE CARBURETOR AFTER SHUTTING OFF THE MOTORCYCLE WHEN HOT AND OVERFLOWS ONTO THE HOT ENGINE CASE AND EXHAUST. THIS HAPPENS QUITE OFTEN WHEN SHUTTING OFF THE ENGINE WHEN IT IS HOT. VERY SCARY. *AK