Question about 1986 Yamaha RD 350

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How much compresion should a 01 banshee have on each cylinder

What is the lowest compresion you can have

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Anything under 105 psi you definately need to rebuild your top end.new pistons/rings and a bore.A stock cylinder banshee with factory pistons should average around 125 psi.After a bore and new pistons you will be around 135-140 psi

Posted on May 30, 2009

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The bike will still run even at 7:1 or a little lower, but the specifications call for about 10:1.

Posted on Feb 12, 2009

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1998 Banshee. Why is there no throttle response when wheels are straight?


Hi, John your throttle cables may be out of adjustment, you have pinched or kinked the cables either at the steering neck area or in between the tank and frame area or the cables are dry and clogged with dirt and or rust for more information about your question and valuable "FREE" downloads that you will need please visit the websites below. Good luck and have a nice day.
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Dec 25, 2015 | Yamaha Motorcycles

1 Answer

Wiring diagram racing banshee


The best thing to do would be to get the diagram for a RD/RZ 350LC and the diagram for your KX and use this for comparison. There is no such thing as a "Banshee" diagram. It is a custom built motor, made using a Yamaha RD LC engine.

Dec 11, 2011 | 1986 Yamaha RD 350

1 Answer

I have a 2001 banshee. took my cylinders to yamaha and there bored them out and did the rings i installed everything. has compression spark n air. fuels getting to the carbs but it still wont start. called...


is the timing set properly? you might have an issue unrelated to the cylinder work....can you give me more information....what have you checked, and the exact symptoms....when you took the carb off, did you mess with the TPS ?

Apr 11, 2011 | Yamaha YZ 450 F Motorcycles

1 Answer

Compresion in sump


HI I THINK IT IS BEST TO FIRST SHECK THE COMPRESION IN THE CYLINDERS, USING A COMPRESION TESTER FITED INTO THE SPARK PLUG HOLE, SPIN OVER THE ENGINE AND CHECK THE READING RECORDING IT, ON PAPER FOR EACH CYLINDER WHEN YOU HAVE COMPLETED THIS ON ALL 4 CYLINDERS CHECK OVER YOUR RECORDED NOTES, IT IS NOT ALWAYS LIKELY THE READINGS WILL BE AS SPECIFIED IN THE WORKSHOP MANUAL AS A BIKE OF 10 YEARS OLD WOULD HAVE LOST SOME OF ITS ORIGINAL COMPRESION, BUT YOU ARE LOOKING FOR A READING SIMILAR ON ALL 4 CYLINDERS, IF 1 IS SIGNIFICANTLY LESS THEN YOU COULD HAVE A PROBLEM WHERE THE PISTON OR PISTON RINGS HAVE FAILED, 1ST TRY THE AFORE MENTIONED CHECK BEFORE YOU START GETTING INVOLVED IN ANY EXPENSIVE REBUILD, IF YOU WERE TO REMOVE THE ENGINE OIL FILLER AND RUN THE ENGINE, IT WOULD BE QUITE NORMAL TO EXPERIENCE SOME SORT OF PRESSURE HERE ALTHOUGH IT COULD GET MESSY AS OIL WILL EMERGE, HOPE THIS HELPS

Dec 05, 2010 | 2000 Yamaha YZF-R6

1 Answer

My banshee pushes coolant out of the overflow


Typically, with this type of problem , you are dealing with a leaking head gasket. Compressed gas and air from the compression stroke is forcing gas past the head o-ring or gasket into the coolant side of the cylinder. The expanding air bubble forces coolant past the cap causing the bottle to over flow.

Aug 16, 2010 | 2002 Yamaha TT-R 250

1 Answer

How to fix a cooling leck on my banshee 350 1990 i need a pic of the moter


go to bikebandit.com and look up yamaha 1990 banshee, they have all the schematics and parts you need. if it's leaking from the radiators, try bars leaks from your local parts stores, from a hose, tighten otreplace hoses, if itcoming from the top end (cylinders) replace your head gaskets/o-rings, if you are getting water in the crankcase oil, you need a new impeller shaft seal and if it's just coming out of the overflow bottle (under the seat) you have too much antifreeze in in or you are overheating fror some reason, usually running lean, too slow or internal engine damage...

best of luck and happy riding

Mar 16, 2010 | 1986 Yamaha RD 350

4 Answers

Banshee wont rev


Usually related to TORS, specifically the safety switch in the clutch/park brake assembly. If it's defective the engine won't rev. Solution: look for a TORS removal kit.

Jun 16, 2009 | 1986 Yamaha RD 350

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