Question about 1987 Yamaha FZ 750 MG (Europe-US)

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Yamaha runing on 2 cylinders

I am writing to see if anyone knows of a common trait with this engine. Sometimes the engine only runs on the two left cylinders. The two right cylinders kick in sometimes for 5 minutes of riding time to 30 seconds of run time. There is fire to the plugs and gas in the carborator bowls when the cylinders are not working. What could be wrong that is o.k sometimes and goes bad other times? The boots on the carbarators are not cracked. What would maybe cause the vacuum from coming and then disappearing? Any ideas?

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  • 10 Answers

Carburater needles to much wear not seating properly, or coil or plug wre problem.

Posted on Oct 30, 2012

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SOURCE: I purchased a 2006 yamaha vstar 1100. It

There is somthing wrong internaly with that engine.Both carb intakes should **** air in not blow out.sounds like you could have a piston with a hole in it or cracked cylender.But i would not run that engine till you break it down and see whats going on.

Posted on Mar 08, 2011

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2002 yamaha v-star 1100 rear cylinder is running hot


Hi, Anonymous and the usual suspects are:
1. Engine oil level and SAE weight are too low or not circulating.
2. Insufficient or blocked air flow over the engine.
3. Heavy combustion chamber carbon deposits.
4. Ignition timing retarded due to faulty MAP, CKP, or CMP sensor.
5. Carburetor jetted too lean.
6. Leaking intake or exhaust valve.
7. Water coolant old or low change every two years.
8. Water pump failure.
9. Radiator clogged, cap loose or malfunctioning.
10. Radiator fans not coming on.
11. Clutch slipping, brakes dragging, heavy load, towing a trailer etc.
12. Idling too long without moving.
13. For constant hot weather temperatures, mountain, or desert riding conditions consider adding an oil cooler and or cylinder head cooler.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
rear cylinder running hot 2002 yamaha star 1100
HELP 04 1100 custom not firing on rear cylinder
http://www.sloneservices.com/SilverBack/Other-Stuff/V-StarShopManual99-07.pdf
OEM parts for Yamaha
YAMAHA XVS1100A Owner Manual

Feb 20, 2012 | 2002 Yamaha V Star 1100 Custom

1 Answer

Distributor cap. Please mark cylinder No.s on distributor cap connection.


STANDING IN FRONT OF CAR.CYLINDERS FACING YOU FROM LEFT TO RIGHT IS 1 2 3 THIS INFORMATION I GAVE YOU FOR THE 3 CYLINDER 993 CC ENGINE. DRAW A CIRCLE ON PAPER WRITE DOWN THE NUMBER 3 ON TOP OF CIRCLE AND NUMBER 1 AND 2 UNDER THREE THATS YOUR DISTRIBUTOR WIRE LOCATION.NOW IF YOU HAVE THE 1295CC 4 CYLINDER ENGINE.STANDING IN FRONT OF CAR CYLINDERS FACING YOU LEFT TO RIGHT IS CYLINDERS 1 2 3 4 DRAW CIRCLE ON PAPER WRITE NUMBER 4 TOP OF CIRCLE WRITE NUMBER 1 BOTTOM OF CIRCLE.ON LEFT CIRCLE WRITE NUMBER 2 AND FROM RIGHT OF CIRCLE WRITE NUMBER 3 THATS ALL SPARK PLUG WIRES LOCATION ON DISTRIBUTOR WHILE STANDING FACING THE FRONT OF THE ENGINE.

Apr 01, 2011 | Daihatsu Rocky Cars & Trucks

1 Answer

95 montero,3.0l,need a diagram of firing order.HELP!


FIRING ORDER IS 1 2 3 4 5 6 STANDING IN FRONT VECHICLE CYLINDERS TO THE LEFT SIDE ENGINE FACING YOU ARE 1 3 5 CYLINDERS ON THE RIGHT SIDE FACING YOU IS 2 4 6. NOW DRAW A LARGE CIRCLE TOP OF CIRCLE WRITE NUMBER 1 BOTTOM OF CIRCLE WRITE NUMBER 4 ON LEFT SIDE CIRCLE UNDER NUMBER1 WRITE NUMBERS IS 2 AND 3 ON THE RIGHT SIDE CIRCLE BELOW NUMBER 1 WRITE NUMBER 6 AND 5 THAT CIRCLE YOU DREW IS YOUR DISTRIBUTOR PLUGS LOCATION NOW YOU CAN PLACE PLUGS WIRES FROM DISTRIBUTOR TO THE RIGHT SPARK PLUGS LOCATION TO THE CYLINDER BLOCK.LET ME KNOW HOW IT WORKS OUT.

Oct 26, 2010 | Mitsubishi Montero Cars & Trucks

2 Answers

I have a 2009 1100 vstar and the engine spits occasionally back into the carburetor and some times pops so hard that it kills the engine. I took it back to the dealer they reset everthing and they say that...


When Harley's spit through the carburetors they usually pull off the intake manifolds and reseal the them . New gaskets, o-rings, or even manifolds, whatever it takes to seal the intake. You may want to run some Yamaha Ring Free Fuel Additive ( Chevron Techron Fuel Additive) through the bike. A bad spark plug or spark plug cap could also be contributing to the pre-ignition that you are experiencing. If you can fix it yourself may be Yamaha will be kind enough to cover the parts cost if you are still under warranty and you are very polite in the letter you write.

Sep 05, 2010 | Yamaha V Star 1100 Classic Motorcycles

1 Answer

FIRING ORDER ON A 2000 YAMAHA XVZ13TFL motorcycle need to know how pistin are number


The firing order on the V-4 engine in Royal Stars from 1996 up is 1-3-2-4, number 1 being the left (shift side) rear cylinder, 2 the right rear, 3 the left front, and 4 the right front.

Aug 02, 2010 | 2000 Yamaha Royal Star Venture

1 Answer

I didnt understan the response regarding spark plug wiring arrangements in escort 98 for which i got this answer (Firing order 1-3-4-2 --- | 1 | front | | | 2 | of | | | 3 | vehicle | | | 4 | --- --- coil...


WELL I SEE TWO DIFFERENT 2.0 ENGINES ONE IS VIN P THE OTHER IS VIN 3. BUT THE FIRING ORDER IS THE SAME 1 3 4 2 .STANDING IN FRONT OF VECHICLE LEFT TO RIGHT. 1 2 3 4. THAT THE CYLINDERS ORDER.NOW I AM LOOKING AT 2 DIFFERENT SET UP FOR PLUGS WIRES ON COIL PACK.GET A SHEET OF PAPER. WRITE THESE FOUR NUMBER DOWN.THAT WILL BE PLUG NUMBER TO THAT CYLINDER.TAKE A PIECE OF PAPER WRITE NUMBER 3 UPPER LEFT 4 BOTTOM LEFT 2 UPPER RIGHT 1 LOWER LEFT.HOLDING PIECE PAPERSTANDING IN FRONT OF ENGINE THIS IS YOUR PLUG WIRES TO COILS THEN YOU MATCH THEM TO THE CYLINDER NUMBERS.THAT WAS THE 2.0 VIN P ENGINE.NOW FOR THE VIN 3 ENGINE.TAKE ANOTHER PIECE OF PAPER WRITE NUMBERS DOWN. NUMBER 1 UPPER LEFT 4 BOTTOM LEFT 3 UPPER RIGHT 2 BOTTOM RIGHT.STANDING IN FRONT OF VECHICLE MATCH NUMBERS FROM BOTH PAPERS TO COILS THEN TO THE CYLINDERS .THIS SHOULD GET YOU BACK ON TRACK.LET ME KNOW IF YOU HAVE TROUBLE.

Apr 15, 2010 | 1998 Ford Escort

1 Answer

Pluged in the computer to my truck and it said there is a o2 sensor malfunction of bank 2. how do i find it? also it says the truck is running to lean. is this cause by the o2 sensor?


Yes, this too lean runing engine is due of oxygen O2 sensor malfunction. Must be replaced with new one. You can find it very simply on bank 2. The bank 1 of V8 engine is the cylinder bank on the right (passenger's) side of the car, (for Left Hand Drive vehicles). So the bank 2 is placed on the left (driver's) side of the car, (for Left Hand Drive vehicles). The bad oxygen O2 sensor is fitted on bank 2, so you can replace it.

Please rate my response. Thanks!

Apr 11, 2010 | Ford F-150 Cars & Trucks

1 Answer

I WAS WORKING ON GRAND AM GT 3.4L GT. I REPLACE THE HEAD GASKETS AND REPAIR 2 CYLINDER ROCKER ARM TORQUE EVERYTHING AND REINSTALL ALL THE PARTS. I RUN THE ENGINE FILL THE COOLANT AND BLEED IT WORKS VERY...


The manual is very specific about instillation of the presure regulator. All of the o rings need to be replaced, and the pressure regulator mounting screw should be the very last thing you tighten or else leaks will develop. Also coat the o rings with engine oil before assembly

Jan 14, 2010 | 2000 Pontiac Grand Am GT

2 Answers

Rd500 running on 2 cylinders


ok so now its a 500 then!!! same engine in it,,,try cleaning the carbereter jets out and a new set of spark plugs wont hurt,,if its still missfiring check for spark if its there and a good spark have a compreshion test done as it could be 2 + 3 pistons have over heated or a head gasket blown

Nov 22, 2009 | 1986 Yamaha RD 350

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