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BikeRider12345 · 07-09-2009, 10:30 AM

Hey guys. This is weird because I have checked the ONLY things I could think is wrong with this bike, I don't even know if this makes any sense.

This bike only has 2 out of four cylinders running. It has spark, compression and fuel. I saw on another site a guy was having this problem and it was caused by the spark plug cables being reversed. Mine are not. Any ideas? The bike runs, but it takes forever to warm up having only half of it running.

longride · 07-09-2009, 10:34 AM

"It has spark, compression and fuel."

You have that on all four cylinders? Can't be. I would say one of the coils is bad since it fires 2 cylinders, and a bad coil is probably the most likely.

mscuddy · 07-09-2009, 11:25 AM

Try turning on the choke, do the other cylinders start to work? If so you're carbs on the offending cylinders have plugged up jets. You're welcome.

07-09-2009, 10:30 AM	#1
BikeRider12345 Registered Member Join Date: Jun 2009 Posts: 6	1983 Yamaha XJ 650 Carb issue Hey guys. This is weird because I have checked the ONLY things I could think is wrong with this bike, I don't even know if this makes any sense. This bike only has 2 out of four cylinders running. It has spark, compression and fuel. I saw on another site a guy was having this problem and it was caused by the spark plug cables being reversed. Mine are not. Any ideas? The bike runs, but it takes forever to warm up having only half of it running.

07-09-2009, 10:34 AM	#2
longride Super Duper Mod Man Join Date: Nov 2001 Location: Anywhere they let me Posts: 10,484	"It has spark, compression and fuel." You have that on all four cylinders? Can't be. I would say one of the coils is bad since it fires 2 cylinders, and a bad coil is probably the most likely. __________________ I'm a knucklehead

07-09-2009, 11:25 AM	#3
mscuddy MODERATOR X Join Date: Jun 2007 Location: Next to my still checkin the temp. Posts: 5,444	Try turning on the choke, do the other cylinders start to work? If so you're carbs on the offending cylinders have plugged up jets. You're welcome. __________________ A gun is a tool, Marian; no better or no worse than any other tool: an axe, a shovel or anything. A gun is as good or as bad as the man using it. Remember that.

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