I recently got a Yamaha xs650 s2. It was running on one cylinder and recently got the left to start running due to a spark plug issue. A bunch of smoke came out of the left side due to it not firing. The left pipe coming out of the chamber is reading 404 degree Fahrenheit and the right is between 175-200 degrees? Any suggestions. The left pipe gets RED at night.
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Left head pipes burning up more than right
- Thread starter zurek4
- Start date
Tomterrific
XS650 Junkie
Could be timing.
Could be idle jet plugged.
Could be carb balance.
Sorry, can't be more specific.
Tom
Posted via Mobile
Could be idle jet plugged.
Could be carb balance.
Sorry, can't be more specific.
Tom
Posted via Mobile
Most of the time when one cylinder runs and one doesn't, the problem is dirty carbs.
www.amckayltd.com/carbguide.pdf is the best source of info on our carbs. Read it, print it out and read it. Read it till it starts to make sense.
Now put it too use by following the steps to tear down, clean, inspect what you have. Pay particular attention to the idle and enrichener circuits.
Now if your inspection reveals worn or damaged parts buy just the parts you need.
These carbs, with some varaition where used on many bikes other than the XS650. Most carb kits may work with the most popular bikes but seldom work well on ours. The float bowl gasket and float valve are about all that work.
When you do the tear down and cleaning. write down all the numbers on the brass parts.
There is a chart on what these brass parts are by year of the carbs in the carb guide. Compare what you have against what the chart says should be in there.
A PO may have been in there and bot the wreong parts inthere.
Leo
www.amckayltd.com/carbguide.pdf is the best source of info on our carbs. Read it, print it out and read it. Read it till it starts to make sense.
Now put it too use by following the steps to tear down, clean, inspect what you have. Pay particular attention to the idle and enrichener circuits.
Now if your inspection reveals worn or damaged parts buy just the parts you need.
These carbs, with some varaition where used on many bikes other than the XS650. Most carb kits may work with the most popular bikes but seldom work well on ours. The float bowl gasket and float valve are about all that work.
When you do the tear down and cleaning. write down all the numbers on the brass parts.
There is a chart on what these brass parts are by year of the carbs in the carb guide. Compare what you have against what the chart says should be in there.
A PO may have been in there and bot the wreong parts inthere.
Leo
Almost forgot, before you get too far you might want to do a frew things to varify you have the mechanical and electrical stuff right.
Do them in thuis order.
#1 Adjust cam chain.
#2 adjust the valve cleatrance.
#2 check ignition. On your bike being an S11 don't tell us enough. They built them several years. Some had points, Some TCI. What year is your bike?
On points check gap and timing. On TCI check timing.
Get these right before moving on to the carbs.
Your repair manual outlines how to do these things.
Leo
Do them in thuis order.
#1 Adjust cam chain.
#2 adjust the valve cleatrance.
#2 check ignition. On your bike being an S11 don't tell us enough. They built them several years. Some had points, Some TCI. What year is your bike?
On points check gap and timing. On TCI check timing.
Get these right before moving on to the carbs.
Your repair manual outlines how to do these things.
Leo
